GNC Women's Prenatal Program Calcium 600

Our assessment

The evidence shows that calcium is a critical mineral during pregnancy, supporting both your bone health and your baby's development. This product provides 600 mg of calcium per serving, which is a meaningful contribution toward the recommended daily intake for pregnant women [NIH ODS]. We advise that you view this supplement as part of your total calcium intake, not your sole source.

How it works

Think of calcium as the building block for your baby's skeleton and teeth. It works through bone mineralization to support bone density and mineral deposition. Additionally, it plays a role in neuromuscular relaxation, which helps your muscles relax and your nerves signal properly [NIH ODS]. This is especially important as your body adapts to the physical demands of pregnancy.

Safety profile

FDA received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. High levels in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

We recommend you take this supplement exactly as directed on the label, and be sure to account for calcium from food and other prenatal vitamins. To improve absorption, take it with food and separate it from any medications by at least two hours. Data not available on specific side effect report counts for this product alone, so monitor your body's response carefully [FDA data] [NIH ODS].

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide