NOW Liquid Melatonin
Brand: NOW · Form: LIQUID, SUPPLEMENT FORM [E0165]
Our assessment
The evidence shows that this product contains melatonin, but a significant portion of the available data focuses on calcium. Our assessment is that for a general audience, the data on calcium is the most robust for making a recommendation, while specific data on melatonin is limited in the provided materials.
How it works
Calcium supports bone mineralization by helping deposit minerals into your bone matrix, and it plays a key role in neuromuscular relaxation by supporting nerve signaling and muscle function [NIH ODS].
Safety profile
Data not available for melatonin specifically. For calcium, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High blood levels of calcium 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]. The total adverse event reports across all supplements in the FDA database is 592,059 [FDA data].
Our recommendation
For calcium, be aware that it can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. You should take calcium supplements separately from these medications. For melatonin, data not available to make a specific recommendation.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 2.0 fl. Oz. 60.0 mL |
| Market Status | Off Market |
How to Read This Label
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