Can you maintain bone density on a plant-based diet?

Yes, but it requires careful planning. The key nutrients for bone health that can be lower in plant-based diets include calcium, vitamin D, vitamin B12, zinc, and omega-3 fatty acids. Calcium-set tofu, fortified plant milks, kale, bok choy, and beans are useful plant-based calcium sources. Vitamin D and B12 supplementation is typically recommended for those on fully plant-based diets.

Do vegans have lower bone density?

Some studies have found that vegans on average have slightly lower bone density and higher fracture rates than omnivores, though this is not universal. The risk is greatest in those with inadequate calcium and vitamin D intake. Vegans who consume fortified foods and supplement appropriately can maintain bone density within a healthy range.

What plant foods are highest in calcium?

The best plant-based calcium sources include calcium-set tofu (around 350 mg per 100g), fortified plant milks (typically 120–150 mg per 100ml), canned sardines and salmon with bones, kale and bok choy (though with lower bioavailability than dairy), white beans, almonds, and tahini. High-oxalate greens like spinach and beet greens contain calcium but it is poorly absorbed.

Plant-Based Diet and Bone Health: Key Considerations After 50

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A note before you read: This article is for educational purposes only and does not replace medical advice. Speak with a qualified healthcare professional before changing your diet, especially if you have a bone health condition or take medication.

Plant-based diets are increasingly popular, and for good reasons — they’re associated with lower rates of heart disease, type 2 diabetes, and certain cancers. But bone health on a plant-based diet requires more attention than proponents sometimes acknowledge. The nutrients most critical for bone — calcium, vitamin D, vitamin K2, and protein — are all harder to obtain adequately on a fully plant-based diet. This doesn’t make a plant-based diet incompatible with good bone health; it just means planning matters more.

The Key Nutrients to Monitor

Calcium: Dairy is excluded on a vegan diet. Good plant calcium sources exist — bok choy, kale, broccoli, fortified plant milks, calcium-set tofu, and white beans — but they require deliberate inclusion and adequate portions to hit 1,200mg daily. Relying on spinach or almonds as primary calcium sources is a common mistake: both have low bioavailability due to oxalates and phytates respectively.

Vitamin D: Few plant foods contain meaningful vitamin D. Fortified foods (plant milks, cereals) help, but supplementation is typically necessary for most plant-based eaters, especially those in northern climates or with limited sun exposure. Choose vitamin D3 from lichen (vegan) rather than D2.

Vitamin K2: The main dietary source of MK-7 K2 is natto — a fermented soybean product. Other plant foods contain K1, but conversion to K2 is limited. Supplementing with MK-7 K2 is strongly advisable for plant-based eaters focused on bone health.

Protein: Adequate protein is achievable on a plant-based diet through legumes, tofu, tempeh, edamame, seitan, and seeds — but requires intentional planning to hit the 1.0–1.2g/kg/day target for bone health after 50.

Omega-3s: ALA from flax, chia, and walnuts converts poorly to EPA/DHA. Algae oil supplements provide EPA and DHA directly from a plant source and are a sensible addition for plant-based eaters.

What the Research Shows

Studies have found that vegans tend to have lower bone mineral density and higher fracture rates than omnivores — but the gap largely disappears in vegans who ensure adequate calcium and vitamin D intake. This suggests that the plant-based diet itself isn’t the problem; the nutrient gaps that can accompany it are.

For a comprehensive daily approach to bone health, The Bone Density Solution provides structured guidance for adults over 50.