Name: Calcium Citrate
Brand: Ethical Nutrition
SKU: 00860
Price: 14.0 GBP
Availability: InStock

✔ BONES ✔ TEETH ✔ MUSCLE FUNCTION

60 capsules | 30 day supply

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Not all calcium supplements are created equally! So give your bones, muscles, and nerves the support they deserve with our highly absorbable Calcium Citrate. Each dose contains 300mg of elemental calcium delivered in citrate form for optimum absorption and bioavailability. With no unnecessary fillers and a Vegan Society-approved formula that's gentle on digestion, our Calcium Citrate is the safe, natural choice for your calcium needs.

2 capsules provide:

Ingredient	Amount	NRV %
Calcium	300mg	38%

Ingredients: Calcium Citrate, Vegetable Cellulose (Capsule Shell), Rice Concentrate.

Take 2 capsules per day during or after a main meal.

Calcium is a water-soluble mineral and will begin to work quickly. Some people even report a change in muscle function after just a few days! By day 90 (depending on your starting calcium status), you should now be reaching a healthy cellular level of calcium and reaping the benefits for bones and teeth.

Store in a cool, dry place.

At Ethical Nutrition, quality and safety come first - every ingredient, every batch.

Independent Lab Testing
Before any ingredient is used in production, it’s tested by accredited third-party laboratories for heavy metals and microbiological contaminants. Only materials that meet our strict standards move forward to become part of your supplement.

Full Batch Transparency
We believe in clear, honest communication. That’s why we share a summary of the latest test results for every product batch. If you’d like to see a previous batch, just drop us a message at hello@ethical-nutrition.com and we’ll be happy to help.

Made to the Highest Standards
Our products are manufactured in a BRCGS Grade AA certified facility and produced under strict Good Manufacturing Practice (GMP) guidelines. These certifications ensure robust controls around cleanliness, traceability, ingredient quality, and packaging.

Exceptional Allergen Control
We follow rigorous allergen management procedures from goods-in through to dispatch. Dedicated cleaning routines, thorough risk assessments, and segregated storage help minimise cross-contamination risks—making our supplements a safer choice for sensitive individuals.

100% Clean Formulas
You won’t find any unnecessary fillers, binders or additives in our supplements. They’re free from GMOs, palm oil, flavourings and the top 14 allergen-containing ingredients (including gluten, dairy, soy, and nuts). All of our products are registered with the Vegan Society.

We do the hard work behind the scenes so you can trust what’s in the capsule.

60 vegan capsules. 2 per day

Made in the UK to GMP standards.

Plastic-free, recyclable packaging.

Family-owned business.

100% clean formula.

Suitable for vegetarians and vegans. All Ethical Nutrition products are free from animal-based ingredients and by-products. Registered with the vegan society.

Free-from: GMOs, Magnesium Stearate, Gelatin, Palm Oil/Palm Oil Derivatives, Maltodextrin, Bulking Agents, Titanium Dioxide, Sugar.

No Allergen-Containing Ingredients: This product is formulated without any ingredients from the top 14 allergens, including wheat, milk, nuts, soy, and shellfish.

Additive-free: We don't use any nasty additives and where required we use gluten-free rice extract to help us to blend together ingredients and ensure they are accurately dosed.

Calcium is essential for a wide range of functions:

Development and maintenance of strong bones. Over 90% of your body’s calcium is in the mineral matrix inside bones. Low calcium intake appears to be positively correlated with the development of osteoporosis [1].
Nerve signal transmission and maintain a healthy nervous system. Calcium helps stabilize cell membranes and regulate excitatory neurons [2].
Muscle function. Muscle fibres rely on calcium and magnesium to be able to contract and relax properly. An imbalance in either mineral can lead to muscle cramps and spasms.
Dental health. Calcium is critical for healthy tooth development and the strength and integrity of bones in the jaw.
Blood clotting. One of the less well-known roles calcium plays in the body is in blood clotting processes [3].
Maintaining a normal heart rhythm. Your heart is a large muscle and like any other muscle cells, it relies on calcium to contract properly. Calcium ions are used by heart cells when they contract and pump blood [4]. It's also needed for the heart's electrical rhythms. Too much or too little calcium in the bloodstream can cause arrhythmia.
Female hormone balance. Calcium works in partnership with nutrients like magnesium and vitamin B6 to regulate hormonal activity. Randomized controlled trials have demonstrated the effectiveness of calcium for relieving PMS (pre-menstrual syndrome) symptoms both as a stand-alone supplement and in conjunction with vitamin B6 [5,6].

The most commonly prescribed calcium supplements are made from calcium carbonate. It’s a cheap form of calcium with a much lower absorption rate than calcium citrate and often causes constipation.

Calcium carbonate is also used in over-the-counter indigestion remedies because it’s good at neutralising stomach acid. However, stomach acid is vital for liberating zinc, magnesium, and other bone-building nutrients from food.

Calcium citrate has a higher absorption rate than the carbonate form. It doesn't neutralise stomach acid and is unlikely to cause any digestive side effects.

There's slightly less elemental calcium in the citrate version than in carbonate but this is offset by the higher bioavailability and absorption rate.

Calcium citrate is the preferred form of calcium for bone health because of its high bioavailability and absorption rate and low risk of side effects.

Calcium citrate may be helpful for people who want to:

Enhance their dietary intake of calcium. If your diet is low in leafy greens, nuts and seeds, pulses, or dairy products you may benefit from extra calcium.
Maintain bone density and strength.
Manage osteopenia or osteoporosis.
Support their dental health.
Manage muscle cramps.
Support nerve signalling and a healthy heart rhythm.
Manage PMS symptoms.

Yes, calcium supplements can interact with many types of medication including antibiotics and thyroid medication. We recommend you speak to your healthcare provider before taking calcium citrate alongside any prescription medications or other mineral supplements.

People with hyperparathyroidism, prostate cancer, kidney stones, or chronic kidney disease should not supplement calcium without medical supervision

Unlike cheap forms of calcium carbonate, our calcium citrate is well tolerated and unlikely to cause digestive issues.

Voulgaridou, G., Papadopoulou, S. K., Detopoulou, P., Tsoumana, D., Giaginis, C., Kondyli, F. S., Lymperaki, E., & Pritsa, A. 2023. Vitamin D and Calcium in Osteoporosis, and the Role of Bone Turnover Markers: A Narrative Review of Recent Data from RCTs. Diseases (Basel, Switzerland), 11(1), 29. https://doi.org/10.3390/diseases11010029
Pikor, D., Hurła, M., Słowikowski, B., Szymanowicz, O., Poszwa, J., Banaszek, N., Drelichowska, A., Jagodziński, P. P., Kozubski, W., & Dorszewska, J. 2024. Calcium Ions in the Physiology and Pathology of the Central Nervous System. International Journal of Molecular Sciences, 25(23), 13133. https://doi.org/10.3390/ijms252313133
LeBrasseur, N. 2003. Calcium for strong clotting. The Journal of Cell Biology, 160(7), 980. https://doi.org/10.1083/jcb1607iti2
Maltsev, V. A., & Lakatta, E. G. 2007. Normal heart rhythm is initiated and regulated by an intracellular calcium clock within pacemaker cells. Heart, Lung & Circulation, 16(5), 335–348. https://doi.org/10.1016/j.hlc.2007.07.005
Shobeiri, F., Araste, F. E., Ebrahimi, R., Jenabi, E., & Nazari, M. 2017. Effect of calcium on premenstrual syndrome: A double-blind randomized clinical trial. Obstetrics & Gynecology Science, 60(1), 100. https://doi.org/10.5468/ogs.2017.60.1.100
Masoumi, S. Z., Ataollahi, M., & Oshvandi, K. 2016. Effect of Combined Use of Calcium and Vitamin B6 on Premenstrual Syndrome Symptoms: a Randomized Clinical Trial. Journal of Caring Sciences, 5(1), 67–73. https://doi.org/10.15171/jcs.2016.007