Sundown Naturals Melatonin Liquid
Brand: Sundown Naturals · Form: LIQUID, SUPPLEMENT FORM [E0165]
Our assessment
The evidence shows that Sundown Naturals Melatonin Liquid is a supplement intended to support sleep, but you should be aware that the active ingredient is calcium, not melatonin, based on the data provided. Our assessment: calcium is primarily known for bone health, not sleep regulation. Data on this specific product’s effects is limited, and you should not expect it to work like a typical melatonin supplement [NIH ODS].
How it works
Think of calcium as a mineral essential for multiple body functions — it supports bone mineralization and density, and it plays a role in neuromuscular relaxation and nerve signaling [NIH ODS]. This means calcium can help with muscle relaxation, but the provided data does not link it directly to sleep onset or circadian rhythm regulation. For sleep-specific benefits, you would typically look to melatonin, which is not listed in the ingredients for this product.
Safety profile
Data not available for side effects specific to Sundown Naturals Melatonin Liquid. However, for calcium, high intakes can cause 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 FDA received a total of 592,059 adverse event reports across all supplements, but specific report counts for this product are not available [FDA data].
Our recommendation
Our recommendation: Do not use this product for sleep support. The data shows it contains calcium, not melatonin, and calcium’s primary role is bone health, not sleep. If you are seeking a sleep aid, look for a supplement with melatonin listed as the active ingredient. For calcium, take it with food and separate from medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin to avoid absorption issues [NIH ODS]. Consult your healthcare provider before starting any new supplement.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 2.0 fl. Oz. 59.0 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