NOW Liquid Melatonin
Brand: NOW · Form: LIQUID, SUPPLEMENT FORM [E0165] On Market
Our assessment
The evidence shows that NOW Liquid Melatonin is a product intended to support sleep, but our assessment here focuses on its key ingredient, calcium, which is listed on the label. Based on the data provided, calcium plays a critical role in bone health and muscle function, but you should be aware of significant safety considerations before taking this supplement [NIH ODS].
How it works
Think of calcium as a master regulator for your bones and nerves. It supports bone density and mineral deposition, which is essential for maintaining strong skeletal structure. Additionally, calcium aids in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS].
Safety profile
The FDA has received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High levels of calcium in your blood and urine 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] [FDA data]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data on side effects specific to this product is not available.
Our recommendation
We recommend you consult with your healthcare provider before taking this supplement, especially if you take prescription medications for thyroid conditions, infections, or bone health. Start with the lowest effective dose and monitor for any signs of nausea or constipation. Do not exceed the recommended daily intake without professional guidance, as the risks of high calcium levels are serious [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 2.0 fl. Oz. 59.0 mL |
| Market Status | On 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