Sundown Naturalist Maximum Strength Melatonin 10 mg

Our assessment

The evidence shows that this product, Sundown Naturalist Maximum Strength Melatonin 10 mg, contains a very high dose of melatonin. While melatonin is a common supplement for sleep, 10 mg is significantly above the typical starting dose. Data for the ingredient calcium, which is not the primary active ingredient here, indicates it supports bone density and neuromuscular relaxation [NIH ODS]. For the melatonin in this product, specific data on its mechanism and efficacy at this dose is not available in the information provided.

How it works

Think of melatonin as a sleep signal for your body. It helps regulate your circadian rhythm, telling your brain it is time to rest. The calcium in the label's ingredient list functions differently, acting as a mineral regulator for bone mineralization and nerve signaling [NIH ODS]. However, for the 10 mg melatonin dose specifically, how it works at that level is not detailed in the data provided.

Safety profile

The FDA has received a total of 592,059 adverse event reports for all dietary supplements, but specific side effects for this exact product are not available in the data. For calcium, high intakes are linked to risks including constipation, nausea, and abnormal heart rhythms [NIH ODS]. For melatonin at 10 mg, specific side effects with report counts are not available in the data provided. It is important to note that calcium can interact with medications like bisphosphonates, tetracycline antibiotics, and levothyroxine [NIH ODS].

Our recommendation

Start with a much lower dose of melatonin, typically 0.5 mg to 3 mg, which is more standard for sleep support. The 10 mg dose in this product is very high and its specific safety profile is not detailed in the available data. Because the product label lists calcium, be aware of potential interactions if you take prescription medications. Always consult your doctor before starting a high-dose supplement like this one.

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