Natural Factors Whole Earth & Sea Women's 50+ Multivitamin & Mineral

Our assessment

The evidence shows that this product is a comprehensive multivitamin and mineral formula designed for women over 50. Our assessment is based on the key ingredient calcium, which is present in the formula. Calcium is well-supported for bone health, but you need to be aware of specific safety considerations and potential medication interactions, especially at this life stage [NIH ODS].

How it works

Think of calcium as a structural worker and a messenger for your body. It supports bone density through a process called bone mineralization, helping to keep your skeleton strong as you age. It also plays a critical role in neuromuscular relaxation, meaning it helps your muscles relax and your nerves send signals properly after they fire [NIH ODS].

Safety profile

Data not available for total adverse events specific to this product. The FDA database contains 592,059 total reports for all dietary supplements. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. Extremely high levels of calcium 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] [FDA data].

Our recommendation

Our recommendation is to use this supplement as directed, but first check your total calcium intake from all sources, including food and other supplements. If you take medications for osteoporosis (bisphosphonates), antibiotics (tetracycline or fluoroquinolone types), thyroid hormone (levothyroxine), or seizure medication (phenytoin), take this multivitamin at a different time of day from those drugs to prevent absorption issues [NIH ODS]. Always consult your healthcare provider before starting any new supplement regimen.

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