Some links on this site are paid links: if you buy through them, we earn a commission at no extra cost to you. This page has no paid links. Affiliate disclosure.
NOW Calcium & Magnesium Citrate Powder with Vitamin D3 is a powder sold under the NOW brand. Its label lists 3 vitamins and minerals. At the label's highest daily amount (1.5 tsp a day), magnesium (114% of the adult limit) is above the upper limit for adults, from this product alone. Upper limits don't apply when a doctor prescribes a higher amount for a set time; if nobody did, talk to your doctor or pharmacist before you change anything.
Take other supplements too? Add this one to the Supplement Checker and see your daily totals next to the limits for your age.
Add NOW Calcium & Magnesium Citrate Powder with Vitamin D3 to the Supplement Checker
What’s in NOW Calcium & Magnesium Citrate Powder with Vitamin D3
| Ingredient | Per serving | Per day | Share of the adult limit |
|---|---|---|---|
| Vitamin D3 | 5 mcg | 5 mcg | 5% (under the adult limit) |
| Calcium | 400 mg | 400 mg | 16% (under the adult limit) |
| Magnesium | 400 mg | 400 mg | 114% (above the adult limit) |
“Share of the adult limit” compares the daily amount with the upper limit for adults 19 to 50 (From age 51 the calcium limit is 2,000 mg; from age 71 the phosphorus limit is 3,000 mg). For most nutrients the limit counts food too.
How to take NOW Calcium & Magnesium Citrate Powder with Vitamin D3 (from the label)
- The label says: “Suggested Usage: Mix 1 1/2 level teaspoons of powder into at least 8 oz. of cold water or clear liquid. Add powder slowly while stirring. Take once daily with a meal. Pure calcium and magnesium citrate powders can increase the temperature of liquids upon contact; therefore, the recommended serving must be mixed into at least 8 oz. of cold liquid to neutralize this reaction prior to ingestion.”
NOW Calcium & Magnesium Citrate Powder with Vitamin D3 warnings (from the label)
- “Caution: This product must be dissolved into at least 8 oz. of cold water or clear liquid before consuming. Do not breathe powder and avoid contact with skin, eyes, and clothing. For adults only.”
- “Consult physician if pregnant/nursing, taking medication, or have a medical condition.”
- “Keep out of reach of children.”
- “Not manufactured with wheat, gluten, soy, milk, egg, fish or shellfish ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.”
Other ingredients
None.
FDA recalls for NOW
The FDA enforcement records list 16 supplement recalls under the name NOW (any product of that name, any date; searched November 9, 2026). Check whether one matches your product’s lot code:
- NOW Nutritional Yeast Powder (Now Foods), recall F-0936-2025, reported June 18, 2025
- NOW Royal Jelly 1500mg 60 VCAPS UPC 733739025654 NOW Royal Jelly 1500mg 60 VCAPS (Distributed by Sofico)… (NOW Health Group Inc.), recall F-0155-2022, reported November 17, 2021
- NOW Bee Pollen 500mg 100 VCAPS UPC 733739025203 (NOW Health Group Inc.), recall F-0157-2022, reported November 17, 2021
- NOW Ginseng & Royal Jelly 90 VCAPS UPC 733739040077 MMA Nutrition Ginselin 90 Veg Capsules UPC 733739440075 (NOW Health Group Inc.), recall F-0156-2022, reported November 17, 2021
- NOW 4×6 Acidophilus (NOW Health Group Inc.), recall F-0512-2021, reported May 26, 2021
- NOW Vitamin B-50 Complex with C 100 Veg Caps (NOW Foods), recall F-0682-2019, reported December 12, 2018
Who sells it
NOW Foods, Bloomingdale, IL (as printed on the label).
If you think you or a child took too much of a supplement, call Poison Control at 1-800-222-1222 (U.S., free, 24 hours) or use poison.org. In an emergency, call 911.
Sources: NIH Dietary Supplement Label Database, label 204955; upper limits from the National Academies Dietary Reference Intakes. Labels change: check the amounts on your bottle.
General information, not medical advice. Your doctor may recommend a different amount, for example to treat a deficiency. Talk to your doctor or pharmacist before you start, stop or change a supplement, especially if you are pregnant, nursing, take medication or have a medical condition.