Vitamins For Woman

Vegan Diet for Bone Health: The Complete Guide to Strong Bones (2025)

margaret etudo

Medically Reviewed By Margaret Etudo. Written By The Vitamins For Woman Team.

Building strong bones on a vegan diet is possible with the right foods, nutrients, and lifestyle strategies.

Vegan diet for bone health

Table of Contents

Introduction

Bone health is a growing concern for individuals who choose a vegan diet. Without animal-based calcium-rich foods and vitamin D-fortified dairy products, vegans must be intentional about incorporating bone-strengthening nutrients to prevent osteoporosis and maintain skeletal integrity.

Research indicates that individuals who follow a plant-based diet can achieve optimal bone mineral density (BMD) when they understand the principles of nutrient absorption, synergy, and adequate dietary planning. 

This article explores why bone health matters for vegans, top vegan calcium sources and a practical 7-day meal plan to ensure you build strong bones on plants.

Why Bone Health Matters for Vegans

Vegan diets are associated with lower fracture risks when well-planned, but calcium and vitamin D remain key nutrients of concern. 

Calcium Absorption Challenges (vs. Dairy)

One of the primary challenges vegans face is the lower bioavailability of calcium from plant sources compared to dairy products. 

Dairy naturally contains highly absorbable calcium, while plant-based calcium often binds with oxalates and phytates, reducing its absorption rate. 

For example, calcium from spinach is poorly absorbed due to its high oxalate content, whereas fortified plant milks or calcium-set tofu have a similar absorption rate to cow’s milk.

Research found that although vegans consume less calcium than omnivores, selecting low-oxalate greens, fortified foods, and calcium-rich legumes can bridge this gap. 

To maximise absorption, include foods rich in vitamin D sources and avoid drinking tea or coffee alongside high-calcium meals, as tannins and caffeine can reduce calcium uptake.

Vitamin D & K2 Synergy

Vitamin D and vitamin K2 work synergistically to regulate calcium metabolism and promote the development of strong bones. 

Vitamin D enhances intestinal calcium absorption, while K2 activates osteocalcin, a protein that integrates calcium into the bone matrix rather than leaving it in the bloodstream.

For vegans, vitamin D intake is a critical concern, especially during winter when sun exposure is limited. 

While mushrooms exposed to UV light provide some vitamin D2, vitamin D3 derived from lichen is a more potent vegan alternative. 

Additionally, fermented foods like natto provide vitamin K2, which is often lacking in a vegan diet.

Top 10 Vegan Calcium Sources

Obtaining adequate calcium from plants is possible by incorporating these high-calcium vegan foods into your daily meals.

1. Fortified Plant Milks (300mg/cup)

Fortified plant milks are among the best vegan sources of calcium, offering up to 300mg per cup, which is comparable to the amount found in cow’s milk. 

Soy milk, almond milk, oat milk, and rice milk are often fortified with calcium carbonate or tricalcium phosphate.

Choose unsweetened versions to limit added sugars, and shake the carton well before pouring to redistribute calcium that settles at the bottom.

2. Tofu (Set with Calcium Sulfate)

Tofu, when prepared with calcium sulfate, is another powerful vegan source of calcium, providing up to 350mg per half-cup serving.

Firm and extra-firm tofu varieties are particularly rich in calcium. Tofu is also versatile; it can be stir-fried, scrambled, or blended into creamy sauces for additional protein and bone-supporting nutrients.

Studies have shown that populations consuming high amounts of calcium-set tofu have lower fracture risks and better bone density, making it an essential part of any vegan bone health plan. 

3. Tempeh

Tempeh, made from fermented soybeans, is a calcium-rich vegan protein source, offering approximately 184mg of calcium per cup. 

Its fermentation process enhances mineral absorption, making calcium more bioavailable than in non-fermented soy products. 

Adding tempeh to stir-fries, salads, or grain bowls boosts your calcium intake alongside beneficial probiotics that support gut health.

4. Chia Seeds

Chia seeds provide around 179mg of calcium per 100g serving. Though small in quantity when sprinkled, their daily use in smoothies, puddings, and oatmeal accumulates into a meaningful calcium contribution. 

Additionally, chia seeds supply omega-3 fatty acids and fibre, supporting joint health and overall wellbeing.

5. Almonds

Almonds are an excellent vegan source of calcium, providing 76mg per 28g (approximately 22 almonds). 

At the same time, their calcium content isn’t as high per serving as that of tofu or plant milks.

Incorporating almonds into meals or as snacks increases daily calcium intake while delivering healthy fats and protein for bone-supporting nutrition.

6. Tahini

Tahini, a paste made from sesame seeds, offers 130mg of calcium per two-tablespoon serving.

It is versatile in vegan diets, used in salad dressings, hummus, sauces, or as a spread on wholegrain toast. 

It’s calcium, combined with magnesium, zinc, and healthy fats, that supports mineralisation and skeletal integrity.

7. Bok Choy

Bok choy (Chinese cabbage) is a low-oxalate leafy green with high calcium bioavailability. One cup of cooked bok choy contains about 158mg of calcium. 

Unlike spinach, its low oxalate content ensures that your body absorbs most of its calcium, making it an ideal choice for promoting bone health.

8. White Beans

White beans provide roughly 161mg of calcium per cup cooked. They are also rich in protein, fiber, and magnesium, all of which are essential for bone strength. 

Adding them to soups, stews, and grain salads is an easy way to increase calcium intake while enhancing your overall nutrient profile.

9. Kale

Kale offers approximately 94mg of calcium per cup, cooked, and, like bok choy, has low oxalate levels, allowing for adequate calcium absorption. 

Kale is best consumed lightly steamed to improve digestibility and nutrient uptake while preserving its bone-supporting vitamins and minerals.

10. Fortified Orange Juice

Fortified orange juice provides up to 350mg of calcium per cup. While whole fruits are preferable for their fibre content, fortified orange juice can contribute significant calcium alongside vitamin C, which supports collagen formation in bones. Consume in moderation due to its natural sugar content.

Essential Supplements for Vegan Bones

Supplements are often necessary for vegans to meet the optimal requirements for bone health, ensuring resilience and preventing long-term deficiencies.

Calcium Citrate vs. Algae Calcium

Calcium citrate is a highly absorbable supplement that doesn’t require stomach acid for absorption, making it ideal for people with digestive concerns. 

On the other hand, algae calcium, derived from marine algae, contains naturally occurring trace minerals alongside calcium, which may enhance bone mineralisation.

A review suggests that algae calcium supplements may improve bone density and reduce the risk of fractures over time.

Choosing between calcium citrate and algae calcium depends on your dietary preferences and digestive health. 

While both are effective, algae calcium offers additional minerals, such as magnesium and boron, which are crucial for bone integrity.

The Importance of Magnesium

Magnesium plays a crucial role in maintaining bone health by facilitating the activation of vitamin D and supporting calcium metabolism. 

Approximately 60% of the magnesium in your body is stored in your bones, which enhances their structural strength. 

Vegan sources of magnesium include pumpkin seeds, almonds, black beans, and whole grains; however, supplements may be necessary for individuals with restricted diets.

A magnesium deficiency can impair calcium absorption and negatively impact bone density, thereby increasing the risk of osteoporosis. 

Therefore, a well-balanced vegan bone health plan should ensure at least 310–420mg of magnesium daily.

7-Day Bone-Healthy Vegan Meal Plan

This practical meal plan ensures you get high-calcium, vitamin D-rich, and bone-supporting nutrients daily to build strong bones on a vegan diet.

Day 1: Breakfast – Fortified soymilk smoothie with chia seeds; Lunch – Kale and chickpea salad with tahini dressing; Dinner – Tofu stir-fry with broccoli and quinoa.

Day 2: Breakfast – Calcium-fortified oatmeal with almonds; Lunch – Lentil soup with collard greens; Dinner – Tempeh tacos with cabbage slaw.

Day 3: Breakfast – Fortified oat milk latte with wholegrain toast and avocado; Lunch – Black bean and spinach wrap; Dinner – Thai tofu curry with bok choy.

Day 4: Breakfast – Chia pudding with fortified almond milk; Lunch – Edamame and kale grain bowl; Dinner – Baked tofu with sesame seeds and steamed broccoli.

Day 5: Breakfast – Smoothie with fortified rice milk, flaxseed, and banana; Lunch – Chickpea and collard greens stew; Dinner – Vegan mushroom stroganoff with fortified soy cream.

Day 6: Breakfast – Fortified oat milk porridge with walnuts; Lunch – Quinoa salad with arugula and pumpkin seeds; Dinner – Lentil shepherd’s pie with carrots and peas.

Day 7: Breakfast – Tofu scramble with fortified nutritional yeast; Lunch – Spinach and tahini wrap; Dinner – Black-eyed peas with collard greens and brown rice.

This meal plan combines the best vegan bone-strengthening foods while offering variety to maintain nutrient balance and support overall health.

Frequently Asked Questions

Yes, vegans can meet calcium requirements through a well-planned diet rich in fortified plant milks, tofu set with calcium sulfate, low-oxalate leafy greens like bok choy, almonds, sesame seeds, and chickpeas. However, those with limited dietary variety may benefit from supplements to bridge any nutritional gaps.

Among plant-based milks, fortified soy milk usually provides the highest calcium content, matching or exceeding the 300mg per cup found in cow’s milk. Fortified almond milk and rice milk also offer substantial calcium, but soy milk remains superior for its protein and mineral profile.

In winter, when sunlight is insufficient for vitamin D synthesis, vegans should consider taking lichen-derived vitamin D3 supplements, as vitamin D2 from mushrooms is less potent. Fortified plant milks and vegan spreads can also contribute to daily vitamin D intake.

A Word From Vitamins For Woman

Vegan diets can fully support bone health when you understand calcium absorption, vitamin D synergy, and the importance of magnesium and vitamin K2. By incorporating fortified plant foods, calcium-set tofu, and targeted supplements, you can build and maintain strong bones throughout your life.

Empower your vegan journey with the proper knowledge, strategic meal planning, and lifestyle choices to keep your bones strong and your health resilient in 2025 and beyond.

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margaret etudo

medically reviewed by margaret etudo, BPharm. written by the vitamins for woman team.

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