If you don’t eat milk, cheese, or other dairy — the most common calcium sources — it’s natural to worry whether you’re getting enough calcium from food alone. That’s a valid concern: recent research shows vegans tend to get less calcium from their diets than vegetarians. So, if you follow a vegan diet, it’s wise to monitor your calcium intake to avoid a shortfall.
A well-planned, varied vegan diet can supply enough calcium if you include calcium-rich foods like soybeans, tofu, tempeh, beans, peas, lentils, almonds, seeds, spinach, broccoli, and calcium-fortified products. But keeping every meal varied and balanced isn’t always easy, and that’s where supplements can help. Below are some of the best vegan-friendly calcium supplements available in the UK.
Together Health Calcium
Together Health Calcium is a great choice if you want a natural, clean supplement. It’s made from 100% seaweed (Lithothamnion calcareum) harvested from Atlantic waters. The seaweed absorbs minerals from the ocean, supplying bioactive calcium plus around 72 trace minerals such as magnesium and iodine — it’s kept low in iodine to avoid thyroid issues. This product is sustainably harvested, tested for heavy metals, packaged in compostable, plastic-free materials, travel-friendly, and made in the UK. It’s a good pick if you want both an effective calcium source and an eco-friendly option.
Fushi Wholefood Calcium
Fushi mixes wholefood powders of kale and fig with tri-calcium citrate to boost calcium levels and absorption. It also contains vitamins D and K2 (from bacterial fermentation found in miso and sauerkraut), which help move calcium into bones. This makes it useful for bone health, and it also supports muscles, blood clotting, and the nervous system. By combining minerals with wholefood ingredients, Fushi aims to improve absorption without high doses. The formula is plant-based, free from synthetic additives, and packed in eco-friendly packaging.
Silvertown Health Vegan Calcium
Silvertown Health uses marine algae (Lithothamnion) sustainably harvested from the clean seas off northern Iceland with GPS mapping for traceability, plus organic baobab fruit powder. The algae is about 30% calcium and also contains 72 trace minerals like phosphorus, sulfur, iron, and boron. Research suggests Lithothamnion can help reduce joint pain, support bone health in older people and menopausal women, and improve digestive comfort. Two capsules a day provide 43% of the recommended daily calcium, leaving the rest to come from your diet. The product is gentle on the stomach, free from common allergens, and contains no artificial fillers — a solid natural option for vegans.
Cytoplan Organic Wholefood Calcium
Cytoplan uses calcified seaweed from the clean waters off Iceland’s southwest coast. Each capsule supplies 200 mg of elemental organic calcium that’s highly bioavailable. The seaweed’s porous, hydrolysed surface makes the calcium more soluble in stomach acid and easier to absorb than some other forms like calcium carbonate. Certified organic by the Soil Association and free from additives, it’s suitable for adults and children over four, and for vegans and vegetarians. It’s a gentle, natural way to boost calcium without synthetic ingredients.
Garden of Life Organics Plant Calcium
Garden of Life’s Plant Calcium is a whole-food, plant-based supplement made from organic algae and designed to be easy to digest. It combines plant-sourced magnesium, vegan D3, and vitamin K2 (MK-7) to help calcium absorption and support bone health. Unlike supplements made from crushed limestone, this product uses organic algae and includes extracts from 20 organic fruits and vegetables (apple, beet, broccoli, carrot, spinach, tomato and more). It’s USDA organic and non-GMO, with no chemicals, fillers, or binders. The recommended adult dose is three tablets daily with meals (ideally one per meal). Not intended for children.
Vitality Nutritionals Algae Calcium
Vitality Nutritionals’ Algae Calcium comes from calcified red algae seaweed, providing bioavailable calcium plus trace minerals that aid absorption. Harvested from Icelandic waters, it’s free from additives and side effects. The brand tests rigorously, avoids artificial colours, fillers, binders, and GMOs, and manufactures in certified facilities to maintain quality and transparency.
Lifestream Natural Calcium
Lifestream offers a powder made from Lithothamnium calcereum, a natural sea vegetable, which is ideal if you prefer not to swallow pills. It provides a natural calcium-to-magnesium ratio of about 10:1 and contains no chalk or limestone. The powder also supplies magnesium, zinc, boron, and selenium, with no preservatives or synthetic additives. Suggested doses: adults 1 level teaspoon (2.8 g) daily; children 6–12 years 1/2 teaspoon (1.4 g); children 1–6 years 1/4 teaspoon (0.7 g). Mix into water or juice after food. One serving gives 924 mg of elemental calcium, making it a strong, natural option with useful trace minerals.
Nature’s Own Wholefood Calcium
Nature’s Own uses seaweed harvested from the Atlantic seabed off Ireland’s southwest coast. Two vegicaps provide 1,250 mg of calcified seaweed, delivering 400 mg of calcium and 28 mg of magnesium per serving. The minerals naturally present in the seaweed support absorption and effectiveness. The formula is gentle on the stomach and free from synthetic additives, offering a natural way to support bone health and overall wellbeing.
If you’re wondering why these supplements made the list, here’s how I chose them:
I hope this list helps you find a suitable vegan calcium supplement. Choosing the right product can make a real difference in keeping your bones healthy — here’s to stronger bones and better health!