NOW Liquid Magnesium with Trace Minerals
Brand: NOW · Form: LIQUID, SUPPLEMENT FORM [E0165]
Our assessment
The evidence shows that the key active ingredient in NOW Liquid Magnesium with Trace Minerals is calcium, not magnesium as the product name implies. For bone health and nerve function, calcium is a well-researched mineral, but you should be aware that this product’s primary benefit comes from calcium, not magnesium [NIH ODS].
How it works
Think of calcium as a bone mineralization specialist — it helps your body deposit minerals into bone tissue, supporting bone density and strength. It also plays a role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly after contraction [NIH ODS].
Safety profile
The FDA has received a total of 592,059 adverse event reports for products in this category. Specific side effects from calcium supplements can include constipation, nausea, and weight loss. Very high intakes may lead to poor muscle tone, poor kidney function, low phosphate levels, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS] [FDA data].
Our recommendation
If you are looking for a magnesium supplement, this product is not your best choice because the data identifies calcium as the primary ingredient. If you need calcium for bone health, be cautious with dosing: high levels can interfere with medications like bisphosphonates, tetracycline antibiotics, and levothyroxine [NIH ODS]. We recommend discussing your specific mineral needs with your healthcare provider before starting this supplement.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 8.0 fl. Oz. 237.0 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