When to take it
With food, in doses of up to about 500 mg at a time (better absorbed).
← All supplements
MineralsModerate evidence
Calcium
Also known as: Ca
Calcium is the most abundant mineral in the body and the foundation of bones and teeth; it is also involved in muscle contraction and blood clotting. A supplement makes sense mainly when you do not get enough from food (dairy, mineral water, vegetables, legumes).
What it is used for
- Maintenance of normal bones and teeth – strong evidence (EFSA)
- Lower fracture risk in older people together with vitamin D – moderate evidence
- Benefit when dietary intake is adequate – weak evidence
Forms and how they differ
citrate
absorbed even on an empty stomach, suitable with low stomach acid
carbonate
high calcium per tablet, take with food
lactate
well soluble but low calcium per gram
from seaweed (Lithothamnion), coral calcium
natural sources of calcium carbonate with other minerals; advantages over standard forms are not clearly shown
Pairs well with
Vitamin D, vitamin K2, magnesium.
Do not combine / separate
Keep at least 2 hours apart from iron, zinc, thyroid medication, some antibiotics and bisphosphonates.
Watch out for
Take care with kidney stones, kidney disease and high blood calcium. If you take medicines (especially for the heart, blood pressure, thyroid or antibiotics), consult your doctor.
Safety
EFSA set an upper limit of 2500 mg calcium per day (food and supplements combined). Prefer getting it from food.
Practical tip
First estimate how much calcium you get from food – often you only need to top up the difference.
Products containing Calcium 22
Calcium carbonate (coral) 480 mgcarbonate (coral) · 480 mg / serving
Calcium coral calciumcoral calcium
Calcium + Magnesium + Vitamin D3chewable
Calcium + Magnesium + Vitamin D3 + Zincmixed
Calcium + Magnesiumliquid
Calcium citrate + magnesium bisglycinate + zinc bisglycinate + D3 120 mgcitrate + magnesium bisglycinate + zinc bisglycinate + D3 · 120 mg / serving
Calcium carbonate + citrate + vitamin D3 320 mgcarbonate + citrate + vitamin D3 · 320 mg / serving
Calcium 200 mgaspartate · 200 mg / capsule
Calcium + Vitamin D3 + Vitamin K2citrate + MK-7
Calcium 200 mgcitrate · 200 mg / capsule
Calcium citrate + magnesium citrate 200 mgcitrate + magnesium citrate · 200 mg / serving
Calcium citrate 400 mgcitrate · 400 mg / serving
Calciumcitrate
Calcium citrate malate 200 mgcitrate malate · 200 mg / serving
Calcium 200 mgionic · 200 mg / serving
Calciumlactate
Calcium lactate 240 mglactate · 240 mg / serving
Calcium + Vitamin D3 + Vitamin K2 + Boronmicrocrystalline hydroxyapatite
Calcium carbonate + vitamin D3 500 mgcarbonate + vitamin D3 · 500 mg / tablet
Calciumcarbonate
Calcium carbonate (red algae Lithothamnion) 600 mgcarbonate (red algae Lithothamnion) · 600 mg / serving
Vitamin D2 + Calciumergocalciferol + citrate
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence
Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.
Combination check
Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.
Check Calcium with othersWhich supplements do you actually need?
Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.
From the same group
Bone support blendModerate evidenceBoronWeak evidenceChromiumWeak evidenceCopperWeak evidenceElectrolytesModerate evidenceIodineStrong evidence
Important notice
This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.