Thermal Effect of Food: How Meals Naturally Burn Calories

Scrambled eggs on a chilly Thursday morning in Chicago, Illinois, breakfast eaten quickly before heading out the door, and a body already working hard before the first step outside. Not just digesting the food, but burning calories in the process. That phenomenon is called the Thermic Effect of Food, or TEF, and it is one of the most underappreciated components of daily calorie burn in mainstream nutrition conversation. Understanding how meals naturally burn calories through digestion gave me a completely different lens for thinking about food choices, not just what I eat, but how different foods create different metabolic demands. This guide covers the science clearly, the practical applications honestly, and the common myths directly.

What Is the Thermic Effect of Food (TEF)?

The Thermic Effect of Food, also called diet-induced thermogenesis or postprandial energy expenditure, refers to the energy your body uses to digest, absorb, and metabolize nutrients from the food you eat. It is a real, measurable component of daily calorie burn. And it is one that the food you choose directly influences.

The Basic Definition of TEF

Every time you eat, your body must perform a complex series of biological tasks to convert food into usable energy and building materials:

• Break food down mechanically and chemically, chewing initiates the process; stomach acid and digestive enzymes complete the chemical breakdown
• Absorb nutrients into the bloodstream, the small intestine transfers digested nutrients across its lining into circulation
• Convert nutrients into usable energy or storage, glucose is either burned immediately or stored as glycogen; amino acids are used for protein synthesis or energy; fats are transported and stored or oxidized

Each of these steps requires energy, calories burned in the process of processing the calories you consumed. That energy expenditure is the Thermic Effect of Food.

Why Digestion Requires Energy

Digestion is not passive. It is a complex, energy-intensive biological process involving multiple organ systems working in coordination:

• Stomach acids, the production and maintenance of hydrochloric acid in the stomach requires meaningful energy expenditure
• Digestive enzymes, pancreatic lipases, proteases, and amylases are synthesized and secreted specifically to break down fat, protein, and carbohydrates respectively, enzyme production has an energy cost
• Intestinal absorption, active transport mechanisms in the intestinal lining use energy to move nutrients across the gut wall into the bloodstream
• Protein metabolism specifically, converting amino acids into either usable proteins or energy involves nitrogen processing that has a particularly high metabolic cost

The National Institutes of Health estimates that TEF accounts for approximately 8-15% of total daily energy expenditure in most healthy adults, a meaningful contribution that varies significantly based on what you eat.

Another Name for TEF

In metabolic research literature, the Thermic Effect of Food appears under several terms that mean essentially the same thing:

• Diet-Induced Thermogenesis (DIT): the most common term in scientific literature, emphasizes the heat production that accompanies elevated metabolic activity during digestion
• Postprandial Energy Expenditure: describes the elevated calorie burn that occurs in the hours following a meal
• Specific Dynamic Action (SDA): an older term for the same phenomenon, still seen in older research

Regardless of the label, all of these terms describe the same metabolic reality: eating requires energy, and the amount of energy required varies by food type.

How TEF Fits Into Your Total Daily Calorie Burn

To understand how the Thermic Effect of Food fits into the complete picture, it helps to see it alongside the other components of daily energy expenditure. TEF is one of four distinct metabolic processes that together determine your Total Daily Energy Expenditure (TDEE).

Components of Total Daily Energy Expenditure (TDEE)

Your body burns calories through four separate mechanisms each day. Understanding all four prevents the common error of thinking only about exercise when estimating daily calorie burn:

• Basal Metabolic Rate (BMR): 60-70% of total daily burn, the energy your body uses at complete rest to maintain vital function
• Physical Activity: 15-30%, intentional exercise and structured movement
• Thermic Effect of Food: ~8-15%, the metabolic cost of digestion, absorption, and nutrient processing
• Non-Exercise Activity Thermogenesis (NEAT): 5-15%, incidental daily movement including walking, standing, fidgeting, and household activity

Table 1: Major Components of Daily Calorie Burn

Nutrition researchers divide energy expenditure into these metabolic categories to explain how digestion contributes to daily calorie burn alongside the more commonly discussed components of metabolism and physical activity.

TDEE Component	Percentage of Daily Calorie Burn
Basal Metabolic Rate (BMR)	60-70%, organ function, circulation, temperature, cell repair
Physical Activity	15-30%, intentional exercise and structured movement
Thermic Effect of Food (TEF)	~8-15%, digestion, absorption, and nutrient metabolism
Non-Exercise Activity Thermogenesis (NEAT)	5-15%, incidental movement, standing, fidgeting

Why TEF Matters More Than People Think

At 8-15% of total daily expenditure, TEF is smaller than BMR or physical activity, but it is far from negligible. For a person with a TDEE of 2,200 calories, TEF contributes approximately 175-330 calories per day of metabolic work just from processing food.

That range, 175 to 330 daily calories, represents a meaningful difference that is entirely within your control through food choice. A high-protein, whole-food diet generates significantly more daily TEF than a low-protein, ultra-processed diet at identical total calorie levels. Over weeks and months, this difference compounds into a real metabolic advantage for people who eat accordingly.

Why Different Foods Have Different Thermic Effects

The Thermic Effect of Food varies significantly by macronutrient and food type. This variation is not arbitrary, it reflects genuine differences in the biological complexity of processing different nutrients.

Macronutrient Digestion Differences

The three macronutrients, protein, carbohydrates, and fat, require very different amounts of metabolic work to process:

• Protein: 20-30% thermic effect, by far the most metabolically expensive macronutrient to digest and process; breaking down proteins into amino acids and then rebuilding or converting them requires significant enzymatic and hepatic (liver) work
• Carbohydrates: 5-10% thermic effect, moderate digestive effort; simple sugars require relatively little processing while complex carbohydrates require more enzymatic breakdown
• Fat: 0-3% thermic effect, the most efficiently processed macronutrient; dietary fat requires minimal energy to absorb and is easily stored, which is partly why it is so calorically dense in net effect

Digestive Complexity

The relationship between digestive complexity and thermic effect is direct: the more biochemical steps required to process a food, the more energy the body expends in doing so. Complex molecular structures, long protein chains, complex polysaccharides, dense fibrous plant cell walls, require more enzymatic activity, more intestinal processing, and more hepatic metabolism.

Ultra-processed foods are specifically designed for minimal digestive resistance, they are pre-broken down, refined, and modified so that absorption is fast and easy. Fast, easy absorption means low thermic effect. Whole, minimally processed foods retain their complexity, more digestive work, higher thermic effect.

Whole Foods vs Processed Foods

Research comparing whole food and ultra-processed food diets at matched calorie levels consistently finds that whole food diets produce higher TEF. A landmark study published in the journal Cell Metabolism found that participants eating ultra-processed food diets, matched for calories, sugar, fat, and fiber content, consumed approximately 500 more calories per day than those eating whole food diets, largely because of the reduced TEF and satiety differences between the two.

The practical implication: two diets with identical calorie counts on paper may produce different actual calorie absorption and metabolic work depending on food quality, with whole foods generating more digestive energy expenditure and lower net calorie delivery.

Protein Has the Highest Thermic Effect

Protein is metabolically exceptional. Its 20-30% thermic effect is not just higher than other macronutrients, it is significantly higher. Understanding why protein generates such elevated digestive energy expenditure explains both its metabolic advantages and its role in weight management.

Why Protein Is Metabolically Expensive

The elevated thermic effect of protein comes from the biological complexity of protein metabolism:

• Breaking proteins into amino acids, proteins are long, complex chains; enzymatic breakdown into individual amino acids requires multiple sequential steps across stomach and small intestine
• Rebuilding proteins for tissues, amino acids absorbed from food are reassembled into structural proteins, enzymes, hormones, and antibodies, all energy-requiring biosynthesis processes
• Removing excess nitrogen, protein is the only macronutrient that contains nitrogen; when amino acids are used for energy rather than protein synthesis, the nitrogen must be converted to urea in the liver and excreted by the kidneys, this urea cycle has a significant metabolic energy cost

These three processes combined produce a thermic effect that burns 20-30% of protein calories before any usable energy or structural benefit is delivered. No other macronutrient comes close to this metabolic cost.

Table 2: Thermic Effect by Macronutrient

Researchers measure the thermic effect of macronutrients by comparing oxygen consumption and carbon dioxide production before and after meals of different compositions. These ranges reflect the scientific consensus published in metabolic research and referenced by the American College of Sports Medicine and National Institutes of Health.

Macronutrient	Thermic Effect (% of Calories Burned in Digestion)
Protein	20-30%, highest metabolic cost of any macronutrient
Carbohydrates	5-10%, moderate digestive energy cost
Fat	0-3%, lowest digestive energy cost
Fiber (within carbohydrates)	~5-10%, additional digestive work from fermentation in gut

Real-Life Example

Here is what the thermic effect difference means in practical terms. You eat two 100-calorie portions, one pure protein, one pure fat. The protein generates a 20-30 calorie thermic effect, delivering 70-80 net usable calories. The fat generates a 0-3 calorie thermic effect, delivering 97-100 net usable calories.

Scale that to a full day’s worth of food. A person eating 150 grams of protein per day, 600 protein calories, burns 120-180 calories just processing that protein. A person eating 50 grams of protein per day, 200 protein calories, burns 40-60 calories processing protein. The 100-gram-per-day difference in protein intake creates a 80-120 calorie per day difference in TEF alone. Over a month, that is 2,400-3,600 additional calories burned without any change in exercise or activity.

Carbohydrates and Their Moderate Thermic Effect

Carbohydrates sit in the middle of the thermic effect spectrum, meaningfully above fat, substantially below protein. Their thermic effect varies depending on the type and complexity of the carbohydrate.

How Carbs Are Digested

Carbohydrate digestion begins in the mouth, salivary amylase starts breaking down starch even before food reaches the stomach. The small intestine completes carbohydrate digestion using pancreatic amylase and brush-border enzymes, converting complex carbohydrates into monosaccharides (primarily glucose) for absorption into the bloodstream.

Once absorbed, glucose is either burned immediately for energy, stored as glycogen in muscles and liver (a process requiring ATP energy), or converted to fat for long-term storage. The glycogen storage step, converting glucose into glycogen, has its own energy cost that contributes to carbohydrate’s moderate thermic effect.

Simple vs Complex Carbohydrates

The thermic effect of carbohydrates varies meaningfully between simple and complex forms:

• Simple sugars (white sugar, glucose, fructose): require minimal enzymatic processing, they are already in their absorbed form or one step away; low end of carbohydrate thermic effect range
• Complex carbohydrates (oats, quinoa, brown rice, sweet potato): require more extensive enzymatic breakdown across multiple steps; higher end of carbohydrate thermic effect range
• Resistant starch (green banana, cooked and cooled potato, legumes): escapes small intestine digestion entirely and undergoes fermentation in the large intestine, producing short-chain fatty acids and generating significant digestive energy expenditure

Fiber and Digestive Effort

Dietary fiber, technically a carbohydrate, has its own distinct thermic contribution. Insoluble fiber passes through the digestive system relatively intact, but soluble fiber undergoes fermentation by gut bacteria in the large intestine, producing short-chain fatty acids (SCFAs) like butyrate, acetate, and propionate. This fermentation process:

• Requires metabolic work from gut bacteria, increasing digestive energy expenditure
• Produces SCFAs that directly fuel colonocytes (intestinal wall cells)
• Slows overall digestion, extending the thermic effect window across more hours post-meal

High-fiber foods, legumes, oats, vegetables, fruit, generate meaningfully more digestive energy expenditure than low-fiber equivalents at the same calorie level. This is one reason fiber-rich diets consistently produce better body composition outcomes than matched low-fiber diets.

Why Dietary Fat Has the Lowest TEF

Fat has a thermic effect of essentially zero to three percent, the lowest of any macronutrient by a wide margin. This is not a reason to avoid dietary fat, but understanding why fat is so efficiently processed helps explain the metabolic advantage of higher-protein, higher-fiber diets.

Efficient Fat Storage

The body can store excess dietary fat almost directly. Dietary triglycerides are broken down into fatty acids and glycerol for absorption, then reassembled into triglycerides for transport via chylomicrons through the lymphatic system before entering the bloodstream. The metabolic work involved is minimal compared to the extensive enzymatic cascades required for protein and complex carbohydrate digestion.

This efficiency is evolutionarily logical, storing fat for future energy use was a survival advantage in environments with variable food availability. The body conserves as much energy as possible from fat intake, resulting in near-zero digestive energy expenditure.

Why Fat Is Calorie Dense

Fat contains 9 calories per gram, more than double the 4 calories per gram of both protein and carbohydrates. Combined with its near-zero thermic effect, fat delivers the highest net caloric energy per gram of any macronutrient. This caloric density is why fat management is so important in total calorie calculations, small portions contain significant energy that is nearly fully absorbed.

Does This Mean Fat Is Bad?

No, and this distinction is important. Low thermic effect does not equal unhealthy. Dietary fat is essential for multiple biological functions:

• Hormone production, steroid hormones including testosterone, estrogen, and cortisol require dietary cholesterol and fatty acids as precursors
• Brain function, the human brain is approximately 60% fat by dry weight; adequate dietary fat supports neurological structure and function
• Fat-soluble vitamin absorption, vitamins A, D, E, and K require dietary fat for absorption; a very low-fat diet impairs absorption of these essential micronutrients

The Harvard T.H. Chan School of Public Health identifies healthy fat intake as important for long-term cardiovascular health, hormonal function, and metabolic health. The practical takeaway: fat has a low thermic effect, so it contributes fewer calories to digestion, but it contributes essential biology that protein and carbohydrates cannot replace.

Real-Life Food Examples and Their TEF Impact

The Thermic Effect of Food becomes concrete when comparing real meals that share similar calorie counts but differ significantly in macronutrient composition.

Table 3: Example Meals and Estimated Thermic Effects

Dietitians illustrate TEF differences by comparing meals with similar calorie totals but different macronutrient profiles. The net usable calories column shows what remains after digestive energy expenditure, a practical illustration of how meals naturally burn calories at different rates.

Meal Example	Total Calories	Estimated TEF	Net Usable Calories
Chicken breast + vegetables + brown rice	500 calories	High (~15-20%)	~400-425 usable
Pasta with cream sauce and bread	500 calories	Moderate (~8-10%)	~450-460 usable
Fried snack foods (chips, crackers)	500 calories	Low (~3-5%)	~475-485 usable
Greek yogurt + nuts + fruit	400 calories	High (~15%)	~340 usable

Why High-Protein Meals Burn More Calories

The chicken breast and vegetable meal in the table above burns 75-100 more calories through digestion than the fried snack food meal, at the same total calorie count. Over time, consistently choosing high-protein, whole-food meals versus processed equivalents generates hundreds of additional weekly calories burned through TEF alone.

This is not a dramatic metabolism hack. It is a real, documented metabolic advantage that accumulates slowly and consistently, exactly the kind of sustainable edge that matters over months and years of eating.

How Food Quality Affects Metabolism

Beyond TEF itself, whole food meals produce metabolic benefits that extend beyond the immediate digestion window:

• Higher satiety per calorie, protein and fiber extend fullness, naturally reducing subsequent intake without requiring calorie counting
• More stable blood sugar, complex carbohydrates and fiber slow glucose absorption, reducing the insulin spikes and energy crashes that drive subsequent hunger and overeating
• Gut microbiome support, fiber fermentation feeds beneficial gut bacteria, supporting the microbial ecosystem associated with healthy metabolism and weight management

Expert Insights on the Thermic Effect of Food

Metabolic researchers have studied TEF for decades, and the evidence consistently supports its relevance to practical nutrition planning, even if it remains less discussed than macros and calorie counts in popular diet culture.

“The thermic effect of food represents a meaningful component of energy expenditure and varies depending on the macronutrient composition of meals,” says Dr. Eric Ravussin, a leading metabolic researcher at the Pennington Biomedical Research Center in Baton Rouge, Louisiana and one of the most published scientists in the field of energy metabolism. “Higher-protein diets consistently produce greater postprandial thermogenesis, meaning that protein genuinely burns more calories in digestion, not just in theory but in measured clinical studies.”

Guidance From U.S. Nutrition Experts

The Academy of Nutrition and Dietetics, the largest organization of food and nutrition professionals in the United States, identifies balanced meals containing adequate protein, fiber, and whole foods as supporting metabolic efficiency across the lifecycle. Their evidence-based practice guidelines consistently recommend:

• Protein distribution across multiple meals per day rather than concentrated in one meal, optimizes both protein synthesis and cumulative TEF contribution
• Whole, minimally processed foods as the dietary foundation, higher fiber content and greater digestive complexity support higher TEF
• Fiber intake at or above recommended levels (25-35 grams per day for adults), directly supports gut fermentation processes that contribute to digestive energy expenditure

What Dietitians Often Recommend

From working with nutrition professionals and reviewing clinical practice guidelines, three recommendations consistently appear in TEF-informed nutrition planning:

• Higher protein intake, 1.6-2.2 grams per kilogram of body weight for active adults supports both muscle maintenance and maximum thermic effect contribution
• Whole foods as the dietary default, choosing minimally processed foods over ultra-processed alternatives generates consistently higher TEF at the same calorie level
• Balanced meals with protein, fiber, and complex carbohydrates, this combination maximizes both immediate satiety and postprandial thermogenesis

Can You Increase the Thermic Effect of Food?

Yes, and the strategies for doing so overlap substantially with the recommendations for overall diet quality. Maximizing TEF does not require unusual foods or complicated approaches. It requires consistent choices about what types of food make up most of your diet.

Eat More Protein

Increasing protein intake is the single most direct way to increase TEF. Every gram of protein burns 0.20-0.30 calories in digestion. Increasing daily protein from 100 grams to 150 grams adds approximately 10-15 additional daily calories burned through TEF, modest in isolation, meaningful across months. Practical high-protein food choices:

• Eggs, 6g protein per egg, complete amino acid profile, highly versatile
• Chicken breast, 52g protein per 6 oz cooked, lean, neutral flavor
• Greek yogurt, 17g protein per cup, portable, fast prep
• Legumes (lentils, chickpeas, beans), plant-based protein with high fiber, double TEF benefit from both macronutrients

Choose Whole Foods

Replacing ultra-processed foods with whole food equivalents increases TEF at the same calorie level. The substitution does not need to be dramatic to be effective. Practical examples:

• Brown rice instead of white rice, more fiber, more bran layer intact, modestly higher thermic effect
• Whole fruit instead of fruit juice, fiber retained, slower digestion, higher thermic effect
• Steel-cut or rolled oats instead of instant oats, less processed, more digestive work required
• Whole nuts instead of nut-based crackers or snack products, intact cell structure increases digestive complexity

Eat Balanced Meals

Meals that combine protein, fiber-rich carbohydrates, and healthy fat generate the highest sustained TEF over the hours following eating. The combination matters because:

• Protein contributes the highest immediate thermic spike
• Fiber extends the digestive window, fermentation in the large intestine continues generating TEF energy expenditure for hours after initial digestion
• The combination produces the most stable blood sugar, avoiding the rapid absorption that characterizes low-TEF processed meals

Common Myths About the Thermic Effect of Food

TEF is frequently misrepresented in diet culture, often overclaimed as a metabolism-boosting magic trick, and occasionally dismissed as irrelevant. The truth is more measured and more interesting than either extreme.

Myth: Certain Foods Burn Fat

No food has a negative calorie effect, where digestion burns more calories than the food contains. This claim circulates persistently around foods like celery (6 calories per stalk) and cucumber, but the thermic effect of any food is a percentage of its caloric content, never exceeding it. A 6-calorie stick of celery generates perhaps 0.3-0.6 calories of digestive energy expenditure. It does not create a calorie deficit through eating.

The practical takeaway: very low-calorie vegetables are excellent foods for weight management because they provide volume, fiber, and micronutrients for minimal calorie cost, not because they burn fat through digestion.

Myth: Spicy Foods Dramatically Boost Metabolism

Capsaicin, the compound in chili peppers responsible for their heat, does produce a modest, transient increase in metabolic rate and thermogenesis. Research on capsaicin supplementation shows calorie burn increases of approximately 50-70 calories above baseline in some studies. This is real, but it is small and temporary, the effect diminishes with regular consumption as tolerance builds.

Spicy foods are not a meaningful metabolism-boosting strategy for most people. They are a pleasant flavor addition with a minor, inconsistent, temporary metabolic effect. Protein intake produces TEF effects 10 to 20 times larger that persist with every meal consumed.

Myth: TEF Can Replace Exercise

Physical activity, both structured exercise and NEAT, contributes 15-30% of daily calorie burn. TEF contributes 8-15%. They are different in scale, mechanism, and type of metabolic benefit. Optimizing TEF through diet composition is a valuable, compounding strategy for metabolic health. It does not replace exercise’s unique benefits for cardiovascular health, muscle maintenance, insulin sensitivity, bone density, and mental health.

Use TEF optimization as a dietary tool alongside exercise, not as an alternative to it.

Practical Strategies to Use TEF in Everyday Eating

The practical application of Thermic Effect of Food knowledge does not require complex meal planning or unusual foods. It requires consistent emphasis on the food types that generate the most metabolic work.

Prioritize Protein at Each Meal

Including a meaningful protein source at every meal is the highest-leverage single application of TEF knowledge. Protein at breakfast prevents the low-TEF, blood-sugar-spike-and-crash pattern of carbohydrate-only mornings. Protein at lunch and dinner extends satiety and generates the highest thermic contribution across the day. Practical protein choices for every meal:

• Breakfast: eggs (scrambled, poached, or boiled), Greek yogurt with nuts, cottage cheese with fruit
• Lunch: grilled chicken, canned salmon or tuna, legume-based soups or salads
• Dinner: fish, lean beef, turkey, tofu with a high-protein marinade
• Snacks: hard-boiled eggs, string cheese, edamame, a handful of almonds with Greek yogurt

Include Fiber-Rich Foods

Fiber adds digestive complexity that extends TEF contribution beyond the immediate post-meal window. Specific fiber-rich foods that produce the highest digestive energy expenditure:

• Legumes (lentils, black beans, chickpeas), both protein and fiber, producing double TEF contribution
• Oats, high soluble fiber, extended fermentation in the gut, strong satiety response
• Cruciferous vegetables (broccoli, cauliflower, Brussels sprouts), high insoluble fiber and indigestible carbohydrates
• Berries and apples, high pectin content (soluble fiber) plus antioxidants with minimal sugar impact

Avoid Excessive Ultra-Processed Foods

Ultra-processed foods are metabolically efficient, meaning they require minimal energy to digest and deliver nearly all of their caloric content as net available energy. Replacing ultra-processed choices with whole-food equivalents is the simplest way to consistently increase TEF without changing calorie intake:

• Whole grain bread instead of white bread, more fiber, more bran, higher digestive complexity
• Whole fruit instead of fruit snacks or gummies, fiber retained, no added sugar, higher TEF
• Plain Greek yogurt instead of flavored processed yogurt, more protein, less added sugar, higher thermic contribution
• Homemade meals with whole ingredients instead of packaged convenience food, ingredient complexity naturally increases digestive energy expenditure

Final Thoughts on the Thermic Effect of Food

The Thermic Effect of Food is not the largest component of daily calorie burn, but it is one of the most directly controllable. Every meal you eat requires energy to process, and the amount of energy required depends significantly on what that meal contains. High-protein, whole-food meals generate meaningfully more digestive energy expenditure than low-protein, ultra-processed meals at the same calorie level.

By consistently prioritizing protein-rich meals, whole foods, and fiber-rich carbohydrates, you are not just choosing better nutrition in a general sense, you are actively choosing a dietary pattern that burns more calories in digestion, produces more stable blood sugar, and supports the gut microbiome that influences long-term metabolic health.

Your body is already doing the work. Choosing foods that make digestion work harder, in the productive biological sense, is a strategy that compounds quietly and consistently over months and years.

Final Recommendation

After years of applying TEF knowledge in nutrition coaching and in my own eating approach, here is the practical, concise recommendation:

Prioritize protein at every meal. This is the single highest-leverage TEF strategy available. Aim for 1.6-2.0 grams of protein per kilogram of body weight per day, distributed across three to four meals. The TEF contribution alone burns an additional 80-150 calories daily compared to a low-protein equivalent diet, compounding into a real metabolic advantage over months.

Choose whole foods over ultra-processed alternatives at every practical opportunity. Whole foods generate 2-5 times the thermic effect of their processed equivalents per calorie. This does not require perfection, it requires consistent preference for whole food options when both are available.

Include fiber at every meal. Legumes, oats, vegetables, and fruit generate extended TEF contribution through gut fermentation. Hitting 25-35 grams of daily fiber supports both thermic effect and the gut microbiome health that influences long-term metabolic function.

Do not rely on TEF as a primary weight management strategy. It is a meaningful metabolic tool, not a replacement for calorie awareness, physical activity, or overall diet quality. Use it as one consistent, compounding advantage within a complete nutrition approach.

The Thermic Effect of Food is real, meaningful, and entirely within your control through food choice. That is all the reason needed to let it inform how you eat.

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