Blenheim Pharmacal Prenatal Plus Iron

Our assessment

The evidence shows that Blenheim Pharmacal Prenatal Plus Iron provides a meaningful dose of calcium, a mineral critical during pregnancy. Our assessment is that this supplement is a reasonable option for supporting your prenatal nutritional needs, but you should be aware of specific safety considerations. The data confirms calcium supports bone mineralization and neuromuscular relaxation [NIH ODS].

How it works

Think of calcium as a structural building block for your baby’s developing bones and teeth, while also helping your own muscles relax and nerves signal properly [NIH ODS]. For you, this mineral works to maintain bone density during the demands of pregnancy and supports healthy muscle function, including in your uterus [NIH ODS].

Safety profile

FDA received 592,059 total adverse event reports across all supplements, but specific report counts for this product are not available. Be aware that high calcium intakes might increase the risk of heart disease and prostate cancer, and excessively high blood levels can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Take this supplement as directed on the label. To avoid potential interactions, separate your dose from any prescription medications by at least two hours. Do not take additional calcium supplements without consulting your healthcare provider, as total intake from all sources (food and supplements) should be monitored. If you experience constipation, nausea, or extreme tiredness, contact your doctor [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