Academy of Nutrition position + Drouin-Chartier 2020 egg meta-analysis

Ovo-Vegetarian Diet: Eggs Yes, Dairy No

Ovo-vegetarianism is the less-discussed sibling of lacto-vegetarianism. The diet includes plants and eggs but excludes dairy. It overlaps strongly with lactose intolerance, with cow milk protein allergy, and with people who reject dairy industry practices while remaining comfortable with egg production. This page covers the nutrient logistics, the egg-versus-dairy substitution kit, and the practical question of how many eggs are reasonable per week.

The short answer. Ovo-vegetarian = plants + eggs. Excludes dairy, meat, fish, seafood. Calcium needs fortified plant milks or calcium-set tofu. B12 from eggs plus fortified foods or a low-dose supplement. Choline from eggs is excellent (147 mg per large egg). The diet is straightforward to plan; it is essentially a vegan diet plus eggs.

Why someone chooses ovo-vegetarian

The most common path to ovo-vegetarianism is medical. Lactose intolerance affects approximately 65% of the global adult population (highest in East Asian and Sub-Saharan African populations, lowest in Northern European populations) and cow milk protein allergy affects 2 to 3% of infants with most outgrowing by age five. An ethically vegetarian person with one or both conditions naturally lands at ovo-vegetarian. The diet is also sometimes adopted by people transitioning from lacto-ovo to vegan, dropping dairy first as the larger ethical and environmental change, retaining eggs as a practical bridge.

The other common motivation is ethical. Modern industrial dairy production involves calf separation (calves removed from cows shortly after birth so milk can be collected), routine antibiotic and hormone use in some jurisdictions, and the eventual slaughter of dairy cows when milk production declines (typically at 4 to 6 years rather than the natural 20-plus year lifespan). Egg production has its own welfare concerns (battery cage and barn systems, the killing of male chicks at hatcheries, and beak trimming), but some people find higher-welfare egg sources (free-range, organic, smallholder) ethically acceptable while finding dairy harder to source at comparable welfare standards.

From a strict animal-welfare perspective, neither position is fully defensible (and a vegan would argue both are problematic). The point is that ovo-vegetarianism is a coherent position for a specific subset of practitioners and not a default for new vegetarians.

Nutrient profile: dairy gone, eggs add what they add

Nutrient	Ovo-only delivery	What dairy would add	Action needed
Protein	Good (eggs + legumes + grains)	8 g per cup milk, 17 g per 170 g yogurt	Eat tofu, tempeh, legumes daily
B12	Adequate (eggs 0.6 mcg each)	1.1 mcg per cup milk	Fortified milks or 10 mcg supplement
Calcium	None from eggs	300 mg per cup milk	Fortified soy milk + calcium-set tofu
Vitamin D	Modest (eggs 1-2 mcg each)	~100 IU per US-fortified cup; UK milk not fortified	10 mcg supplement winter
Iodine (UK)	Modest (eggs 25 mcg each)	50-150 mcg per cup UK milk	150 mcg supplement or seaweed
Choline	Excellent (eggs 147 mg each)	38 mg per cup milk	None; surplus
Iron	Slight from eggs (0.9 mg)	Trace from dairy	Eat tofu, legumes, leafy greens
Zinc	Modest from eggs (0.6 mg)	0.9 mg per 30 g cheese	Pumpkin seeds, legumes, tofu
Selenium	Excellent (eggs 15 mcg each)	Modest from dairy	1-2 brazil nuts daily

The structural challenge of the ovo-vegetarian diet is calcium and iodine, both of which dairy supplies generously in the UK food chain. Fortified plant milks (preferably soy because of its protein and complete profile) and calcium-set tofu solve calcium. Iodine needs either iodised salt (not standard in the UK), seaweed (use nori, not kelp), or a 150 mcg potassium iodide supplement. Choline and selenium are easier than for vegans because eggs deliver both.

How many eggs per week is reasonable

The question of egg consumption and cardiovascular risk has a long and contested history. The original concern, from the 1960s and 1970s, was that dietary cholesterol in egg yolks (about 186 mg per large egg, against a former 300 mg per day upper limit) would raise blood cholesterol and cardiovascular risk. The 2015 US Dietary Guidelines removed the 300 mg cholesterol cap, citing inadequate evidence linking dietary cholesterol to blood cholesterol in healthy adults. Most contemporary lipid metabolism research supports the view that saturated fat (not dietary cholesterol per se) is the more important driver of blood LDL.

The 2020 Drouin-Chartier meta-analysis in BMJ (three US cohorts plus pooled analysis of 28 prospective studies) found no association between moderate egg consumption (up to one per day) and incident cardiovascular disease in healthy adults. The PURE international cohort (Dehghan 2020) reached similar conclusions across 21 countries. A subgroup-specific concern remains for people with type 2 diabetes, where pooled cohorts show a small but consistent positive association between high egg intake and cardiovascular events; in this group, three to four eggs per week is a reasonable cap.

For ovo-vegetarians without diabetes, eating one or two eggs per day is within the range supported by current evidence. Heavy egg consumption (three or more per day sustained) lacks long-term safety data and is worth avoiding in the absence of compelling reason. The nutrient density of eggs is high enough that one or two per day delivers meaningful B12, choline, selenium, and vitamin D without needing more.

Sample ovo-vegetarian week

Day	Breakfast	Lunch	Dinner
Monday	Boiled egg with avocado toast on sourdough	Chickpea salad with tahini dressing	Tofu stir-fry with brown rice and broccoli
Tuesday	Porridge with fortified soy milk, banana, peanut butter	Lentil soup with sourdough bread	Spanish tortilla (potato and onion omelette) with salad
Wednesday	Smoothie: soy milk, frozen berries, spinach, flaxseed	Egg fried rice with peas and carrots	Mushroom and chickpea curry with basmati rice
Thursday	Scrambled eggs with tomato and mushrooms on toast	Falafel wrap with hummus and salad	Veggie chili with cornbread (no dairy)
Friday	Tofu scramble with kala namak and toast	Quinoa bowl with roasted vegetables and tahini	Shakshuka (poached eggs in tomato sauce) with bread
Saturday	Eggs benedict with vegan hollandaise on English muffin	Black bean and corn tacos with avocado	Stuffed peppers with rice and lentils
Sunday	Pancakes (regular egg) with fortified soy yogurt and berries	Tomato and white bean soup with sourdough	Mushroom and chestnut wellington with roast vegetables

Egg intake across the week: 9 eggs (slightly over one per day on average), within the range supported by current dietary guidance for healthy adults. Calcium from fortified soy milk, calcium-set tofu, leafy greens, and tahini hits 700 to 1,000 mg daily.

Dairy substitution kit

Milk: for drinking and pouring on cereal, fortified soy milk is the closest nutritional substitute (protein and calcium matched). Oat milk for tea and coffee (foams well). Almond milk for cooking and baking where a thinner consistency works.

Yogurt: soy yogurt (Alpro, Sojade) is the closest in protein content. Coconut yogurt (Coyo, Coconut Collaborative) is creamier but lower protein.

Cheese: the vegan cheese market has improved dramatically. Soft cheeses (cream cheese, mozzarella for cooking) work well in most applications. Hard cheeses (Vio Life, Miyokos, Bute Island) are passable but rarely indistinguishable from dairy. Cashew-based cheese (homemade or commercial) is among the better options for cheese boards.

Butter: Naturli, Flora Plant, and Miyokos all make convincing dairy-free butter. Coconut oil works for high-heat cooking. Olive oil and rapeseed oil for most other applications.

Eggs and food safety. Pregnant ovo-vegetarians should avoid raw or partially-cooked eggs to reduce salmonella risk; cook through. UK Lion-marked eggs and US pasteurised eggs are lower risk and can be used in lightly-cooked applications. Free-range eggs from smallholder sources may carry slightly higher salmonella risk depending on production hygiene. See pregnancy nutrition.

Related diet-type pages

Keep reading

Frequently asked questions about ovo-vegetarianism

Who follows an ovo-vegetarian diet?

Ovo-vegetarianism is less common than lacto-ovo or lacto-only forms, but it has clear constituencies: people with lactose intolerance who are also ethically vegetarian, people with cow milk protein allergy, people who object to dairy industry practices (calf separation, mastitis treatment, etc.) but find egg production acceptable, and people from cultural traditions where dairy is not central (some East Asian dietary contexts). The diet is also a halfway step between lacto-ovo vegetarian and vegan for someone reducing dairy gradually.

How do ovo-vegetarians get enough calcium?

Through fortified plant milks (soy, oat, almond, hemp), calcium-set tofu (350 mg per 100 g), leafy greens (kale, bok choy, collards), almonds and tahini, fortified orange juice, and fortified breakfast cereals. A glass of fortified soy milk plus a portion of calcium-set tofu plus a serving of kale clears the 700 mg UK SACN target. Eggs themselves contribute little calcium (about 25 mg per large egg). The strategies are essentially the same as for vegans, see the calcium page for the full per-food table.

Is B12 a concern without dairy?

Less than for vegans but more than for lacto-ovo vegetarians. One large egg supplies 0.6 mcg of B12; two eggs daily supply 1.2 mcg, which is about half the 2.4 mcg adult RDA. Ovo-vegetarians eating fewer than two eggs per day should add a fortified B12 source (plant milk, breakfast cereal, nutritional yeast) or a 10 mcg per day supplement. The risk profile sits between vegan and lacto-ovo vegetarian; testing serum B12 every few years is reasonable, every year for older adults or those on metformin or PPIs.

Is ovo-vegetarian a recognised category?

Yes. The Academy of Nutrition and Dietetics and most other nutrition bodies recognise ovo-vegetarian alongside lacto-vegetarian and lacto-ovo vegetarian as distinct subgroups. The Vegetarian Society UK includes ovo-vegetarianism in its taxonomy. Research cohorts (EPIC-Oxford, Adventist Health Study-2) typically combine ovo-vegetarian and lacto-ovo into a single vegetarian group for statistical power, because pure ovo-vegetarian samples are too small for separate analysis.

How many eggs can I eat per day on an ovo-vegetarian diet?

The 2015 American Dietary Guidelines removed the previous 300 mg per day cholesterol cap and current guidance treats moderate egg consumption as compatible with a healthy diet. The bulk of the published cardiovascular evidence (PURE study, Drouin-Chartier 2020 meta-analysis) does not support a meaningful association between moderate egg consumption (up to one per day) and cardiovascular events in healthy adults. People with type 2 diabetes show a small but consistent association between high egg intake and cardiovascular events in pooled cohorts, so people with diabetes may want to keep intake at three to four eggs per week rather than daily. Ovo-vegetarians eating two to four eggs per day, which is common, are within the range of normal global consumption without strong evidence of harm.

Can I use ghee or butter on an ovo-vegetarian diet?

No. Ghee and butter are dairy products and are excluded by definition from an ovo-vegetarian diet. For cooking fat use olive oil, rapeseed (canola) oil, coconut oil, vegan margarine (most are now dairy-free; check labels), or avocado. Some egg-substitute butters made from plant oils are widely available (Naturli, Flora Plant, Miyokos, Vio Life). Coconut oil works for high-heat cooking and brings a distinct flavour to South Asian and South-East Asian cuisine.

Sources cited. Drouin-Chartier JP et al. Egg consumption and risk of cardiovascular disease: three large prospective US cohort studies, systematic review, and updated meta-analysis, BMJ 2020; 368: m513; Dehghan M et al. Association of egg intake with blood lipids, cardiovascular disease, and mortality in 177,000 people in 50 countries, Am J Clin Nutr 2020; 111: 795-803; Melina V, Craig W, Levin S. Position of the Academy of Nutrition and Dietetics: vegetarian diets, J Acad Nutr Diet 2016; 116: 1970-1980; BDA Eggs food fact sheet; US Dietary Guidelines for Americans 2020-2025. All values as of May 2026.