Nature's Plus Source of Life Women with Calcium, Folate & Lutein

Our assessment

The evidence shows that this supplement delivers calcium, a mineral essential for bone health, but it requires careful consideration of your overall intake. The data confirms that calcium supports bone mineralization and neuromuscular relaxation [NIH ODS]. However, you must be cautious: some research suggests that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a structural builder for your skeleton. It works through bone mineralization to support density and mineral deposition, while also aiding in muscle relaxation and nerve signaling [NIH ODS]. Without enough, your body will leach calcium from your bones to maintain critical functions.

Safety profile

FDA received 592,059 total adverse event reports across all supplements. For calcium specifically, 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] [FDA data]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Data not available for specific dosage or absorption form from this product. Before starting, review all other sources of calcium in your diet and supplements to avoid exceeding safe levels. If you take any of the listed medications, separate your calcium intake by at least two hours [NIH ODS]. Always consult your healthcare provider before adding this to your routine.

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