Plant-Based Yogurt or Dairy Yogurt: Which Is Really Better for Your Health and the Planet?

Q: Which Plant-Based Milk Contains the Most Protein?

Soy milk ranks first with approximately 3.3 g of protein per 100 ml, followed by pea milk at 2.5 to 3 g per 100 ml. Further behind are oat milk (around 1 g/100 ml) and almond milk (approximately 0.5–1 g/100 ml). Coconut and rice milks contain very little protein. If you're looking for a protein content comparable to cow's milk, only soy and pea milk truly measure up, making them particularly relevant for vegans and physically active individuals.

With the rise of plant-based alternatives, many consumers are wondering whether plant-based yogurt is truly healthier, and more sustainable, than traditional dairy yogurt. From nutritional quality and digestive tolerance to microbiome effects and environmental footprint, the answer deserves a science-based perspective.

Yaourt végétal ou yaourt laitier : lequel est vraiment meilleur pour la santé et la planète ?

Definitions: What Are We Really Talking About?

Dairy Yogurt

Dairy yogurt is a fermented product made from milk (cow, goat, or sheep), inoculated with specific bacterial cultures (Lactobacillus bulgaricus and Streptococcus thermophilus). Fermentation converts lactose into lactic acid, giving yogurt its characteristic texture and tangy flavor.

It is widely recognized as a source of complete protein, bioavailable calcium, and B vitamins. Fermented foods have held an important place in human diets for centuries, particularly for their nutritional value and improved preservation properties¹.

Plant-Based Yogurt

“Plant-based yogurts” (or fermented plant-based alternatives) are made from plant drinks such as soy, almond, coconut, oat, or rice, or directly from legumes. Like dairy yogurt, they are produced through fermentation using bacterial cultures, which modify texture, taste, and certain nutritional properties².

Scientific literature highlights the technological and nutritional potential of fermented plant matrices, especially legume-based ones, in the context of dietary transition and protein diversification³.

Health Benefits: Comparison with a Focus on Plant-Based Yogurts

Health Benefits of Dairy Yogurt

1. Essential Nutrient Intake

Dairy yogurts provide high-quality protein, calcium, and vitamins such as B2 and B12. Scientific data indicate that moderate dairy consumption can fit into a balanced diet and is not consistently associated with increased cardiovascular risk in the general population⁵.

2. Better Tolerance Than Milk for Some Individuals

Fermentation reduces the lactose content of the final product. As a result, yogurt is often better tolerated than milk among individuals with partial lactose intolerance⁶.

Health Benefits of Plant-Based Yogurts (Main Focus)

1. Suitable for Intolerances and Specific Diets

Plant-based yogurts are naturally lactose-free, making them suitable for individuals with lactose intolerance. They also fit vegetarian and vegan dietary patterns⁷.

More broadly, well-balanced plant-based diets are associated with metabolic and cardiovascular benefits⁸.

2. Potential Positive Effects on the Microbiome

Fermentation is associated with beneficial effects on gut microbiome diversity, a key factor in overall health². Increasing dietary diversity, particularly through fermented foods, is considered a strategy to support a resilient and diverse microbiome⁹.

In addition, fermenting plant matrices can improve legume digestibility and reduce certain antinutritional factors².

3. Often a More Favorable Lipid Profile

Plant-based alternatives are generally lower in saturated fat (with the exception of certain coconut-based products) and contain no cholesterol. Within an overall balanced diet, this profile may contribute to improved cardiovascular health⁸.

4. Diversification of Protein Sources

Diversifying protein intake, particularly through legumes, is considered compatible with good health when properly planned⁷. Research on dairy-legume combinations and fermented plant products also highlights their relevance in building more varied and nutritionally adapted dietary patterns⁴.

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Environmental Benefits: A Clear Advantage for Plant-Based Options

Animal-based production systems are generally associated with higher greenhouse gas emissions, greater water use, and more extensive land use compared to plant-based alternatives. Environmental comparisons show that plant-based milks typically have a lower carbon and water footprint than animal milk in most cases¹⁰.

Legumes also play a key role in agricultural transition: they fix atmospheric nitrogen, reduce reliance on synthetic nitrogen fertilizers, and contribute to more sustainable farming systems³.

The development of legume-based plant yogurts therefore aligns with broader goals of crop diversification, localized production, and reduced environmental impact⁴.

Conclusion

Dairy yogurt remains a nutritious and well-tolerated food for much of the population. However, plant-based yogurts stand out for being lactose-free, suitable for plant-based diets, potentially supportive of gut microbiome health, and generally associated with a lower environmental footprint.

In the context of dietary transition and protein diversification, plant-based yogurts, particularly those made from legumes, represent a compelling alternative, provided consumers choose minimally processed and nutritionally balanced products.

Sources

¹ National Institute of health
² NCBI
³ INRAE
⁴ INRAE
⁵ Harvard
⁶ Ameli
⁷ Ameli
⁸ Harvard
⁹ National Geographic
¹⁰ National Geographic

Frequently Asked Questions About Cow's Milk and Plant-Based Milks

Which Plant-Based Milk Is Nutritionally Closest to Cow's Milk?

Fortified soy milk, without question. It provides around 3.3 g of protein per 100 ml, comparable to cow's milk, along with similar levels of added calcium (around 120 mg/100 ml) and often vitamins B12 and D. Today, it is the only plant-based alternative recognised by health authorities, including the EFSA, as a nutritionally suitable substitute for cow's milk in adults. Most other plant-based milks are refreshing beverages rather than true nutritional equivalents.

Is Cow's Milk Bad for Your Health?

Not inherently. For adults who tolerate lactose and do not have a cow's milk protein allergy, consuming one to two servings of dairy per day remains a valuable source of calcium (120 mg/100 ml), protein (3.5 g/100 ml) and vitamin B12. Observational studies consistently associate moderate dairy consumption with benefits for both bone and cardiovascular health. The real issue is not milk itself, but the amount consumed, its quality (preferably organic and minimally processed), and individual tolerance.

Which Plant-Based Milk Contains the Most Protein?

Soy milk ranks first with approximately 3.3 g of protein per 100 ml, followed by pea milk at 2.5 to 3 g per 100 ml. Further behind are oat milk (around 1 g/100 ml) and almond milk (approximately 0.5–1 g/100 ml). Coconut and rice milks contain very little protein. If you're looking for a protein content comparable to cow's milk, only soy and pea milk truly measure up, making them particularly relevant for vegans and physically active individuals.

Does Cow's Milk Promote Acne or Inflammation?

For some people, yes. Several observational studies have associated regular milk consumption, particularly skimmed milk, with a higher prevalence of adult acne, possibly through increased IGF-1 activity and residual hormones naturally present in milk. Whether cow's milk promotes inflammation more broadly remains debated. Most adults tolerate moderate dairy consumption perfectly well. People with acne, eczema or rosacea may benefit from trying a four-week dairy elimination period to evaluate their individual response, as tolerance varies considerably from one person to another.

Is Soy Milk Harmful Because of Phytoestrogens?

No, when consumed in moderation. Soy isoflavones bind only weakly to human oestrogen receptors and, at the equivalent of one to two glasses per day, have not been shown to disrupt hormonal function in healthy adults. The French Agency for Food, Environmental and Occupational Health & Safety (ANSES) simply recommends limiting soy intake in children under three years of age, pregnant women and people with a history of hormone-sensitive cancers. For everyone else, current scientific evidence does not support any specific contraindication.

Are Commercial Plant-Based Milks Really Healthy?

It depends entirely on the product. The best options contain fewer than five ingredients, typically water, nuts or grains, and perhaps a small amount of salt, with no added sugar. Many commercial products, however, contain 3 to 8 grams of sugar per 100 ml, along with emulsifiers, flavourings or thickeners. A simple rule is to choose products with a Nutri-Score A or B, no added sugar, and organic whenever possible. Reading the ingredient list remains the best way to judge quality: the shorter it is, the better.

Can You Completely Replace Cow's Milk with Plant-Based Milk?

Yes, for adults, provided nutritional needs are met through other sources. Calcium can come from fortified plant-based milks or foods such as sardines, tofu, green leafy vegetables, almonds and calcium-rich mineral waters. Vitamin B12 deserves particular attention in people following a strict vegan diet and may require supplementation. For children, completely replacing cow's milk requires careful dietary planning to avoid deficiencies in protein, essential fats and other key micronutrients.

Which Milk Is Best for Children After the Age of One?

Whole cow's milk remains the standard recommendation in France for children between 1 and 3 years of age, thanks to its calcium content, fats essential for brain development, and vitamins A and B12. Plant-based milks, with the exception of fortified soy milk, are not nutritionally equivalent and may lead to deficiencies if they completely replace dairy in young children. In cases of confirmed allergy or intolerance, parents should consult a paediatrician to identify the most appropriate alternative.