Supplements

Calcium in supplements · page 301

14,548 supplements on the U.S. market list Calcium with an amount per serving. The official Tolerable Upper Intake Level for adults is 2,500 mg a day.

Tolerable Upper Intake Level (UL)

The highest daily amount that is unlikely to cause harm for almost all healthy people, from food, drinks and supplements combined.

Age	Men	Women	Pregnancy	Breastfeeding
0-6 months	1,000 mg	1,000 mg	—	—
7-12 months	1,500 mg	1,500 mg	—	—
1–3 years	2,500 mg	2,500 mg	—	—
4–8 years	2,500 mg	2,500 mg	—	—
9–13 years	3,000 mg	3,000 mg	—	—
14–18 years	3,000 mg	3,000 mg	3,000 mg	3,000 mg
19–50 years	2,500 mg	2,500 mg	2,500 mg	2,500 mg
51–70 years	2,000 mg	2,000 mg	—	—
71+ years	2,000 mg	2,000 mg	—	—

Source: NIH ODS Calcium Fact Sheet for Health Professionals, Table 3 (updated 2026-06-22).

Supplements with Calcium

14,548 shown · page 301 of 304

Calcium Citrate Plus Vitamin D3Sundown Naturals · Other (e.g. tea bag)630 mg per serving

Chelated Calcium And MagnesiumSundown Naturals · Tablet or Pill500 mg per serving

C-500 with Esterfied CWindmill · Tablet or Pill100 mg per serving

C-1000 with Esterfied CWindmill · Tablet or Pill170 mg per serving

Oyster Shell Calcium + DEqualine · Tablet or Pill500 mg per serving

Calcium + DEqualine · Tablet or Pill600 mg per serving

Natural Calcium 500 mg With DSunmark · Tablet or Pill500 mg per serving

Calcium 600 With DSunmark · Tablet or Pill600 mg per serving

Calcium Citrate With Vitamin DSunmark · Other (e.g. tea bag)315 mg per serving

Natural Calcium 500 mg With DSunmark · Tablet or Pill500 mg per serving

Vitamin C Ascorbyl PalmitateBronson · Capsule60 mg per serving

Vitamin C With Calcium Ascorbate 500 mgBronson Laboratories · Tablet or Pill65 mg per serving

Folic AcidBronson · Tablet or Pill78 mg per serving

Vitamin C 1000 mg BufferedBronson Laboratories · Tablet or Pill120 mg per serving

Vitamin D 400 IUBronson Laboratories · Tablet or Pill55 mg per serving

Copper 2 mgBronson Laboratories · Tablet or Pill65 mg per serving

Calcium 500 mg SupplementNature Made · Tablet or Pill500 mg per serving

Coral Calcium 1000 mgBronson Laboratories · Capsule3,000 mg per serving

Calcium 500 mg SupplementNature Made · Tablet or Pill500 mg per serving

Citracal RegularBayer Citacal · Tablet or Pill500 mg per serving

Citracal MaximumBayer Citacal · Other (e.g. tea bag)630 mg per serving

Calcigard 250 Plus Vitamin DDouglas Laboratories · Tablet or Pill250 mg per serving

Calcigard One-To-OneDouglas Laboratories · Tablet or Pill250 mg per serving

Oyster Shell Calcium 250 +D21st Century · Tablet or Pill500 mg per serving

Oyster Shell Calcium 500 +D21st Century · Tablet or Pill1,000 mg per serving

Oyster Shell Calcium 500 +D Extra Vitamin D Value Size21st Century · Tablet or Pill1,000 mg per serving

Calcium 500 +D21st Century · Tablet or Pill1,000 mg per serving

Calcium 600+D21st Century · Unknown1,200 mg per serving

Calcium 600+D21st Century · Other (e.g. tea bag)1,200 mg per serving

Highly Absorbable Calcium Citrate +D Bonus Size21st Century · Other (e.g. tea bag)630 mg per serving

Highly Absorbable Calcium Citrate +D Value Size21st Century · Capsule630 mg per serving

Highly Absorbable Calcium Citrate +D 20% Free21st Century · Other (e.g. tea bag)630 mg per serving

Calcium Orotate 745LifeLink · Tablet or Pill85 mg per serving

Cal-MagWhole Foods · Capsule1,000 mg per serving

Calcium 600 mg & Vitamin DEqualine · Tablet or Pill600 mg per serving

Natural Easy To Swallow Calcium 600 mg With Vitamin DSpring Valley · Tablet or Pill1.2 g per serving

Label data: NIH Office of Dietary Supplements, Dietary Supplement Label Database (dsld.od.nih.gov), public domain. Upper limits: NIH ODS Fact Sheets for Health Professionals (values from the Institute of Medicine, Food and Nutrition Board).