NOW Vegetarian, Dry Vitamin D 1,000 IU
Brand: NOW · Form: CAPSULE [E0159]
Our assessment
The evidence shows that this product provides 1,000 IU of vitamin D per serving, which aligns with the daily intake recommended for many adults. However, the specific data provided concerns the ingredient calcium, not vitamin D itself. Based on the available data, we can assess calcium's role, as it is a common companion to vitamin D in bone health protocols [NIH ODS].
How it works
Think of calcium as a structural cornerstone for your body. It supports bone mineralization and density, ensuring your skeleton remains strong. Additionally, it plays a key role in neuromuscular relaxation, meaning it helps your muscles relax and your nerves signal properly after activity [NIH ODS].
Safety profile
The FDA has received 592,059 total adverse event reports for all products. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. Very high blood and urine levels can cause poor muscle tone, kidney dysfunction, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS].
Our recommendation
Data not available on the specific safety profile of this NOW Vitamin D product. For calcium, take it with food and separate from medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin by at least two hours, as calcium can reduce their absorption [NIH ODS]. Consult your doctor before starting any new supplement, especially if you have a history of kidney stones or heart conditions.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 120.0 Vcap(s)(R) |
| 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