General Nutrition Corporation Go To Sleep Melatonin

Our assessment

The evidence shows that General Nutrition Corporation Go To Sleep Melatonin is a dietary supplement intended to support sleep. However, based on the data provided, the primary ingredient listed is Calcium, not Melatonin. This creates a critical discrepancy between the product name and its declared ingredient. Our assessment is that you should verify the product label carefully, as the available data does not support the product's intended use for sleep based on Calcium alone.

How it works

Calcium is a mineral that plays a role in neuromuscular relaxation, supporting muscle relaxation and nerve signaling [NIH ODS]. It is also essential for bone mineralization and density [NIH ODS]. However, the data does not provide any mechanism or study linking Calcium to sleep onset or regulation, which is the purpose implied by the product name.

Safety profile

Data not available for the specific product. The FDA has received a total of 592,059 adverse event reports across all dietary supplements, but no specific reports are linked to this product [FDA data]. For Calcium, high intakes may increase the risk of heart disease and prostate cancer, and 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]. Calcium can also reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

We recommend you do not use this product for sleep support based on the data provided. The ingredient listed is Calcium, which has no established evidence for treating insomnia or promoting sleep onset. If you are seeking a sleep aid, consult your healthcare provider for options supported by clinical research. Given the potential for adverse effects and drug interactions with Calcium, it is important to ensure you are taking this mineral only for its proven benefits, such as bone health, and under professional guidance [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