GNC Melatonin 10 mg

Our assessment

The evidence shows that calcium is a critical mineral for bone health, but the data does not support a general recommendation for high-dose supplementation without a specific medical need. For a product like GNC Melatonin 10 mg, the primary ingredient is melatonin, not calcium. Data on the specific product’s ingredient profile is not available beyond the label. Our assessment is that you should not use this product to meet your calcium needs, as the data provided focuses on a different supplement entirely.

How it works

Calcium functions as a master regulator for your body. It supports bone mineralization by helping deposit minerals into your bone structure, and it promotes neuromuscular relaxation by aiding muscle relaxation and nerve signaling [NIH ODS]. Think of it as the structural foundation for your skeleton and a key player in how your nerves and muscles communicate.

Safety profile

FDA has received a total of 592,059 adverse event reports for all supplements, but specific data for this product is not available. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. Excess calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS].

Our recommendation

We recommend you focus on getting calcium from dietary sources first. If you are considering a calcium supplement, be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. For the GNC Melatonin 10 mg product, the data provided does not support its use for calcium supplementation. Data on the product's specific safety and efficacy is not available, so a clear recommendation cannot be made from the provided information.

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