Douglas Laboratories Melatonin

Our assessment

The evidence shows that Douglas Laboratories Melatonin is a supplement designed to support sleep, but the data provided does not include specific findings on melatonin itself. Instead, the data covers calcium, which is not the primary ingredient in this product. Based on the available information, we cannot make a specific assessment about this melatonin product's effectiveness for sleep regulation. The data on calcium is not directly applicable here, so we must state that specific evidence for melatonin is not available in the provided data.

How it works

While the data does not describe how melatonin works, the information on calcium—an unrelated ingredient—shows it supports bone mineralization and neuromuscular relaxation [NIH ODS]. For melatonin, the data does not provide a mechanism of action. Typically, melatonin helps regulate the sleep-wake cycle, but this claim is not supported by the data you provided. We must rely only on what is given: data not available for melatonin's specific mechanism.

Safety profile

FDA received a total of 592,059 adverse event reports for all supplements, but this number is not specific to melatonin or Douglas Laboratories [FDA data]. For calcium, the data notes that high intakes might increase the risk of heart disease and prostate cancer, and can cause poor muscle tone, constipation, nausea, weight loss, and abnormal heart rhythms [NIH ODS]. However, these side effects are from calcium, not melatonin. Data not available for side effects specific to melatonin from the provided FDA reports.

Our recommendation

Without specific data on Douglas Laboratories Melatonin, we cannot provide a confident recommendation. The data you provided focuses on calcium, which is a different ingredient. For melatonin, data not available. If you are considering this product, consult your healthcare provider. For general supplement safety, note that calcium can interact with medications like bisphosphonates and levothyroxine [NIH ODS], but this does not apply to melatonin. Always check the label and speak with a pharmacist.

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