Natural Factors Whole Earth & Sea Women's Multivitamin & Mineral

Our assessment

The evidence shows that this multivitamin is designed to fill common nutrient gaps, but its value depends entirely on your individual diet. The key ingredient with the most data is calcium, which is included to support bone density and muscle relaxation [NIH ODS]. However, you may not need a multivitamin if you already eat a balanced diet. Specific data on this exact product's effectiveness is not available.

How it works

Calcium in this formula supports your body's bone mineralization process — think of it as the raw material your skeleton uses to stay dense and strong [NIH ODS]. It also helps your muscles relax and your nerves send signals properly after contraction [NIH ODS]. For most women, getting enough calcium through diet and a multivitamin can help maintain long-term bone health [NIH ODS].

Safety profile

FDA received a total of 592,059 adverse event reports across all supplements, but specific report counts for this product are not available. For calcium specifically, high intakes can cause constipation, nausea, and poor muscle tone [NIH ODS]. Extremely high levels in the blood may lead to abnormal heart rhythms and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce absorption of certain medications like levothyroxine and some antibiotics [NIH ODS].

Our recommendation

Start by assessing your diet. If you eat dairy, leafy greens, or fortified foods daily, you might not need this supplement. If you do take it, follow the label dose exactly and do not add extra calcium without talking to your doctor [NIH ODS]. Space it two hours apart from any thyroid medication or antibiotics to avoid absorption issues [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