A raw food diet centers on eating uncooked, unprocessed foods kept below a specific temperature threshold, typically between 104°F and 118°F depending on the plan. The idea is that heating food above these temperatures destroys nutrients and natural enzymes that benefit your body. Most followers eat predominantly fruits, vegetables, nuts, and seeds, though some versions include raw animal products.
How the Diet Works
The core rule is simple: nothing cooked, nothing heavily processed. Instead of heating food on a stove or in an oven, raw foodists rely on blending, dehydrating at low temperatures, soaking, sprouting, and fermenting. A dehydrator set below 118°F can make crackers, fruit leathers, and dried vegetables that still qualify as “raw” under most definitions.
The typical grocery list includes all fresh fruits and vegetables, raw nuts and seeds, sprouted or soaked grains and legumes, dried fruits, raw nut milks and nut butters, cold-pressed olive and coconut oils, fermented foods like kimchi and sauerkraut, seaweed, and sprouts. Some people also include raw eggs, unpasteurized dairy, and even raw meat or fish. What you won’t find on the list: anything roasted, baked, pasteurized, refined, or cooked with added chemicals.
The Three Main Variations
Not everyone follows the same version. The most common type is the raw vegan diet, which combines raw eating with a fully plant-based approach, eliminating all animal products. A raw vegetarian diet excludes meat, fish, and poultry but allows raw eggs and unpasteurized dairy. And a raw omnivorous diet permits all food categories, including raw meat and fish, as long as everything stays uncooked and unprocessed.
The raw vegan version dominates the conversation online, but the omnivorous version has its own following, sometimes called a “primal” raw diet. The nutritional profiles of these approaches differ significantly, especially when it comes to protein, B12, and fat intake.
What Happens to Your Body Weight
Weight loss is one of the most consistent and dramatic effects. In a large survey of long-term raw food dieters, men lost an average of 9.9 kg (about 22 pounds) and women lost an average of 12 kg (about 26 pounds) after adopting the diet. That’s a substantial shift, and for many people, it’s the primary appeal.
But the weight loss isn’t always a good thing. In that same survey, 14.7% of men and 25% of women had a BMI below 18.5, which is classified as underweight. The more raw food someone ate and the longer they stayed on the diet, the lower their BMI tended to drop. For people starting at a higher weight, that trajectory might be welcome. For those already at a healthy weight, it raises concerns about muscle loss and inadequate calorie intake. Raw foods are high in fiber and water, which fills you up fast but delivers fewer calories per bite than cooked meals.
Nutrient Benefits and Gaps
Raw diets tend to be exceptionally high in fiber, vitamin C, folate, and potassium. You’re eating large quantities of fruits, vegetables, and nuts every day, which delivers a flood of plant compounds that most people don’t get enough of. Triglyceride levels tend to run lower in raw food eaters, which is generally favorable for heart health.
The gaps, however, are serious and well-documented. Vitamin B12 is the most critical concern, especially for raw vegans. In a study of strict raw food eaters, those who didn’t supplement with B12 had a median blood level of just 152 ng/L, well below the range most doctors consider adequate. Half of the raw food participants in that study showed elevated homocysteine, a marker that rises when B12 is insufficient and that’s linked to cardiovascular risk. Those who did take a B12 supplement had much healthier levels, around 399 ng/L.
Vitamin D and zinc also ran low in raw food eaters compared to people eating conventional diets. These aren’t minor nutrients. Zinc supports immune function and wound healing, and vitamin D is essential for calcium absorption and bone health.
The Bone Density Problem
One of the more striking findings in raw food research involves bone health. A study published in JAMA Internal Medicine found that long-term raw vegetarian dieters had markedly lower bone mineral content and density in the lumbar spine, hip, and total body compared to people eating a standard diet. The differences were statistically significant and clinically meaningful, affecting the exact skeletal regions where fractures cause the most harm in later life.
Interestingly, the researchers didn’t find evidence that vitamin D status or bone turnover rates explained the difference. The low bone mass appeared to be connected to the diet itself, possibly through lower calorie and protein intake, lower body weight (which puts less mechanical stress on bones), or reduced intake of certain minerals over time.
The Enzyme Argument
A central claim behind raw food diets is that cooking destroys enzymes naturally present in food, and that these enzymes help you digest meals more efficiently. While it’s true that heat denatures most plant enzymes, the practical significance is debatable. Your body produces its own powerful digestive enzymes in the stomach and pancreas, and most plant enzymes get broken down by stomach acid before they could contribute meaningfully to digestion. The enzyme argument sounds intuitive, but the science behind it is thin.
Cooking Sometimes Increases Nutrient Value
One of the assumptions baked into raw food philosophy is that cooking always degrades nutrition. That’s not universally true. Research on cherry tomatoes, for example, found that cooking significantly increased blood levels of two beneficial plant compounds (a flavonoid and a polyphenol) compared to eating the same tomatoes raw. The raw tomatoes didn’t raise blood levels of these compounds at all.
Carrots, spinach, and mushrooms also deliver more of certain nutrients when cooked, because heat breaks down tough cell walls and makes compounds easier to absorb. This doesn’t mean cooking is always better, but it does mean the raw-is-always-superior framing oversimplifies how nutrition actually works. Some nutrients are best preserved raw, others are best unlocked by heat, and the ideal diet probably includes both.
Food Safety Considerations
Eating everything raw introduces food safety risks that cooking would otherwise eliminate. CDC data shows that produce accounts for nearly half of all foodborne illnesses in the United States, most often caused by norovirus. Sprouts are a particular concern because the warm, humid conditions they need to grow are also ideal for bacteria like Salmonella and E. coli. Unpasteurized dairy and raw eggs carry their own well-established risks.
If you follow a raw omnivorous diet that includes raw meat or fish, the stakes are higher. Cooking meat to proper temperatures kills pathogens that cause serious illness. Raw fish served as sushi is typically flash-frozen first to kill parasites, but raw meat prepared at home doesn’t have that safeguard. Careful sourcing and handling become essential.
Who It Works Best For
People who thrive on raw food diets tend to approach them flexibly rather than rigidly. Eating 50% to 75% raw while still including some cooked foods lets you capture many of the benefits (more produce, less processed food, lower calorie density) without the steep nutritional tradeoffs that come with 100% raw eating. If you do go fully raw, supplementing B12 is non-negotiable, and monitoring vitamin D, zinc, and bone health over time is worth the effort. The diet demands more planning than most eating patterns, but for people willing to put in that work, it can deliver a genuinely nutrient-dense way of eating.