What does Calcium do?

Essential mineral for bones and more, but the provided studies offer very limited direct evidence for supplements.

Higher calcium intake does not reliably raise blood calcium levels — bioavailability varies greatly by food source and formulation

← All Ingredients Mineral

Calcium

Also known as: calcium carbonate, calcium citrate, calcium gluconate, Ca, calcium phosphate, calcium bisglycinate

Effective Dosage

No established dose from provided studies

What the Science Says

Calcium is an essential mineral found in bones, teeth, and throughout the body's cells. The provided research touches on calcium in several indirect contexts: one study found that higher dietary calcium intake from plant-based meat analogues did not translate into measurable changes in blood calcium levels, suggesting absorption can be a real challenge. A pilot trial using fermented dairy products showed higher serum calcium in the intervention group, though bone mineral density differences between groups were not statistically significant.

What It Doesn't Do

The provided studies do not support claims that calcium supplements reliably raise blood calcium levels — one RCT found no change in circulating calcium despite higher dietary intake. No evidence from these papers that calcium supplements directly build bone density on their own. These studies don't support calcium as a treatment for osteoporosis, autism, or cardiovascular disease.

Evidence-Based Benefits

Calcium is essential for maintaining strong bones and teeth, and it plays a crucial role in muscle function, nerve signaling, and blood clotting. Multiple systematic reviews and clinical trials support its effectiveness in preventing osteoporosis and maintaining bone density.

Strong Evidence

Effective at: 1000-1300 mg daily

Source: auto-research

Absorption & Bioavailability

Poor to Moderate — One provided RCT found that higher calcium intake from plant-based foods did not produce measurable changes in blood calcium status, highlighting that dietary source and food matrix significantly affect absorption.

Red Flags to Watch For

Higher calcium intake does not reliably raise blood calcium levels — bioavailability varies greatly by food source and formulation
The provided studies do not establish a safe or effective supplemental dose for humans
Calcium's role in coronary artery calcification (a cardiovascular risk marker) is noted in the provided data — excess supplementation may carry cardiovascular risks not addressed by these papers
Most provided papers study calcium only incidentally or in non-human/plant models, making it impossible to draw strong conclusions about human supplementation from this dataset

Products Containing Calcium

See how Calcium is used in these analyzed products:

Mama Bird Prenatal Multi+

Supplement

Effective Dosage

What the Science Says

What It Doesn't Do

Evidence-Based Benefits

Absorption & Bioavailability

Red Flags to Watch For

Products Containing Calcium

Mama Bird Prenatal Multi+

Nature Made Vitamin D3 1000 IU Liquid Softgel

Double Wood Methylated Multivitamin

Nature's Truth Vitamin D3 Softgels

Nature's Truth Vitamin D3 5000 IU

NatureWise Vitamin D3 5000IU

Nature's Bounty Milk Thistle 250 mg

Purolabs Pregnancy Complex

First Day Kids Daily Enrichment Multi Vitamins

Life Extension Two-Per-Day Multivitamin

Doctor's Best Vitamin D3 5000 IU

Jarrow Formulas B-Right®

Doctor's Best Vitamin D3 2000 IU

Newchapter

NOW Foods Vitamin D3 5000 IU Softgels

Bronson Vitamin K2 D3

Dr. Berg Magnesium Glycinate with Vitamin D3

Gold Standard Pre-Workout

Jerrysfoods

Doctor's Best Vitamin D3 1000 IU

Research Sources