17XP
Small, one-off gains in bone density that are unlikely to reduce fractures on their own.
Calcium
Calcium is found in dairy and leafy greens; vitamin D is made from sunlight and found in oily fish
Often taken withVitamin D, Magnesium
Evidence-backed benefits
How Calcium can help, goal by goal, with the studies behind each score.
14XP
Very small effect on blood pressure.
Studies1
14XP
Eased PMS symptoms in small trials, but far less than standard treatment.
Popular claims that did not hold up (1)
People often expect Calcium to help with these. The studies say otherwise, so they are not scored as benefits.
- Fat Loss4XPNo meaningful effect on body fat in controlled trials.
How to read XP
Each score is for this supplement and that specific goal, not a general rating.
XP combines how reliable the research is with how much difference it usually makes. Higher means stronger evidence for that supplement and that goal.
Limited<15 XPModest15–27 XPModerate28–44 XPReliable45–69 XPHigh70+ XP
Dosage
What studies commonly use for Calcium, and how it is usually taken.
Usual dose
1,000–1,200 mg per day
500 mg elemental calcium per dose (1,000–1,200 mg/day total diet + supplement)
How to take it
- With food
- Split into several doses
See study range
500–1,000 mg/day from supplements (UL is 2,000–2,500 mg/day total)
Your journey
Blood Pressure & Circulation comes first (week 4 → week 12); Bone Health & Density takes longest (month 6 → 1 year). An estimate from the studies' timelines, not a promise: everyone responds differently.
From the first noticeable effect to roughly full strength. Colour follows the XP tier of each benefit.
Make it a habit
These gains come from steady use, not a single dose. Keep Calcium in your routine for about 1 year before you judge it.
Safety
What to know before you take Calcium.
Safety rating
Use with care
Dose and timing matter.
- Constipation and bloatingCommon, especially with calcium carbonate.
- Kidney stonesLinked to supplements, not to calcium from food.
Check with a doctor first if you take thyroid medicine or antibiotics, or have had kidney stones.
General information, not medical advice. If you are pregnant, take medication or have a health condition, check with a doctor or pharmacist first.
Common pairings
Supplements and habits often combined with Calcium.
Where to buy
Brands we looked at for Calcium, with our quality score for each.
No listings for this country yet.
Authority
Public figures who take or recommend Calcium. Portraits are AI-generated, not real photos, and this is not an endorsement.
Gwyneth Paltrow
Actress
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