NOW Melatonin 3 mg

Our assessment

The evidence shows that melatonin is a popular supplement for sleep support, but data for NOW Melatonin 3 mg specifically is limited. We assess this product based on the ingredient profile available. For general calcium information, which is not the primary ingredient here, the data indicates it supports bone health [NIH ODS].

How it works

Melatonin is a hormone your body naturally produces to regulate your sleep-wake cycle. For the calcium component, think of it as a structural support — it helps with bone mineralization and neuromuscular relaxation [NIH ODS].

Safety profile

FDA received a total of 592,059 adverse event reports across all supplements, but specific report counts for NOW Melatonin 3 mg are not available. For calcium, high intakes can cause constipation, nausea, and abnormal heart rhythms [FDA data] [NIH ODS]. Data for melatonin-specific side effects is not available in the provided data.

Our recommendation

Start with a low dose and monitor your response. For calcium, be aware that it can reduce absorption of medications like bisphosphonates and levothyroxine [NIH ODS]. Always consult your healthcare provider before starting a new supplement.

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