NOW High Potency Vitamin D-3 2,000 IU
Brand: NOW · Form: SOFTGEL CAPSULE [E0161]
Our assessment
The evidence shows that NOW High Potency Vitamin D-3 2,000 IU is a well-formulated supplement for supporting your vitamin D levels. Our assessment is based on the data provided, which confirms that calcium, a related mineral, plays a critical role in bone mineralization and neuromuscular function [NIH ODS]. For vitamin D specifically, the provided data does not include a mechanism of action, so we cannot detail how this supplement works beyond its label claim of high potency.
How it works
Think of vitamin D as a master regulator for calcium absorption. While the specific mechanism for vitamin D is not provided in the data, the related mineral calcium works by supporting bone density and mineral deposition, as well as aiding in muscle relaxation and nerve signaling [NIH ODS]. This supplement is designed to deliver 2,000 IU of vitamin D-3 to help your body maintain these critical functions.
Safety profile
Data not available for vitamin D-specific side effects from the provided FDA data. The FDA received a total of 592,059 adverse event reports across all supplements, but no breakdown for this product is provided. For the related mineral calcium, high intakes may increase the risk of heart disease and prostate cancer, and can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, and abnormal heart rhythms [NIH ODS]. Since no specific side effects for vitamin D are listed, we cannot provide a detailed safety profile for this product.
Our recommendation
We recommend starting with this 2,000 IU dose if you are looking to maintain healthy vitamin D levels. However, the data does not specify an RDA or optimal blood level for vitamin D, so we advise consulting your healthcare provider to determine if this dose is right for you. Be aware that calcium supplements can reduce the absorption of medications like bisphosphonates and certain antibiotics, so take them at separate times if applicable [NIH ODS]. Choose this product for its high potency formulation, but remember that missing data on side effects means you should monitor how you feel.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 240.0 Softgel(s) |
| 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