Supplements

Calcium in supplements · page 283

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 283 of 304

Ester-C 500 mgAmerican Health · Tablet or Pill110 mg per serving

Calcium-MagnesiumBIOVEA · Capsule1,000 mg per serving

Calcium Citrate with Vitamin D3Patient One 1 MediNutritionals · Capsule600 mg per serving

Calcium 600 mg with DBasic Vitamins · Tablet or Pill600 mg per serving

Calcium Citrate with Vitamin DBasic Vitamins · Other (e.g. tea bag)630 mg per serving

Oyster Shell Calcium 500 mg with DBasic Vitamins · Tablet or Pill500 mg per serving

Mag/Cal ConcentrateComplete H2O Minerals · Liquid52 mg per serving

Coral CalciumPriority One Nutritional Supplements · Capsule525 mg per serving

Dolomite PowderKAL · Powder1,100 mg per serving

Vitamin D 10 mcgGeri-Care · Tablet or Pill25 mg per serving

Calcium with Vitamin D3AN Amazing Nutrition Amazing Formulas · Tablet or Pill600 mg per serving

AntronexSP Standard Process · Tablet or Pill30 mg per serving

Calcium + Vitamin DSwisse Ultiboost · Tablet or Pill1,020 mg per serving

Buffered Vitamin CFreeda · Capsule50 mg per serving

Calcium Citrate with MagnesiumBronson · Capsule300 mg per serving

Calcium Complex and MagnesiumBronson Laboratories · Tablet or Pill1,125 mg per serving

Calcium Complex And MagnesiumBronson · Tablet or Pill1,125 mg per serving

Calcium Phosphate PowderFreeda · Powder1,400 mg per serving

Calcium Hydroxyapatite MCHCBronson · Capsule200 mg per serving

Selenium 50 mcgBronson · Tablet or Pill51 mg per serving

Vitamin B6 50 mgBronson · Tablet or Pill78 mg per serving

Vitamin C 1000 mg Buffered with Calcium AscorbateBronson · Tablet or Pill80 mg per serving

Vitamin C Non-Acidic Calcium Ascorbate Soluble Fine CrystalsBronson · Powder65 mg per serving

600+D321st Century · Tablet or Pill600 mg per serving

C 250 mg21st Century · Tablet or Pill140 mg per serving

C 500 mg21st Century · Tablet or Pill40 mg per serving

C 500 mg21st Century · Tablet or Pill30 mg per serving

Calcium 500 + D321st Century · Tablet or Pill500 mg per serving

Calcium Citrate +D3 Maximum21st Century · Tablet or Pill630 mg per serving

Chelated Zinc 50 mg21st Century · Tablet or Pill125 mg per serving

D3 125 mcg (5000 IU)21st Century · Tablet or Pill90 mg per serving

D3 25 mcg (1000 IU)21st Century · Tablet or Pill90 mg per serving

D3 50 mcg (2000 IU)21st Century · Tablet or Pill90 mg per serving

Magnesium 250 mg21st Century · Tablet or Pill65 mg per serving

D3 25 mcg (1000 IU)21st Century · Tablet or Pill90 mg per serving

Chelated Cal-MagVitaCeutical Labs · Tablet or Pill1,000 mg per serving

Chewable Calcium+D 1000 mg Calcium 400 IU DWindmill · Tablet or Pill1,000 mg per serving

Vitamin C CapsulesDouglas Laboratories · Capsule180 mg per serving

Cal Chew Delicious Orange-Vanilla Flavored Chewable Calcium With Vitamin DDouglas Laboratories · Tablet or Pill333 mg 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).