Pure Encapsulations Mineral 650 (without Copper and Iron)

Our assessment

The evidence shows that Pure Encapsulations Mineral 650 (without Copper and Iron) provides a substantial dose of calcium, which is essential for bone health. Our assessment: this supplement is best suited for individuals who have a confirmed need for high-dose calcium supplementation, such as those with diagnosed deficiencies or specific medical recommendations. You should not take this product lightly, as the 650 mg dose is significant and requires careful consideration of your total dietary intake [NIH ODS].

How it works

Think of calcium as a building block for your skeleton and a signal messenger for your nerves and muscles. It supports bone mineralization and density, which helps keep your frame strong as you age. It also plays a role in neuromuscular relaxation, helping your muscles unwind and your nerves communicate properly after they fire [NIH ODS].

Safety profile

FDA received a total of 592,059 adverse event reports across all supplements, though specific counts for this product are not available. You should be aware that high calcium intakes might increase the risk of heart disease and prostate cancer. Side effects from very high levels include constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS] [FDA data]. Calcium can also reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Start by reviewing your total daily calcium intake from food and other supplements before adding this product. Do not exceed 2,000 to 2,500 mg of total calcium per day from all sources. You should take this supplement with food and separate it from any thyroid or antibiotic medications by at least two hours. Choose this product only if you have a clear, documented need for 650 mg of elemental calcium without additional copper or iron [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