Kirkland Signature Extra Strength Vitamin D3 2000 IU
Brand: Kirkland Signature · Form: SOFTGEL CAPSULE [E0161] On Market
Our assessment
The evidence shows that taking 2000 IU of vitamin D3 is a common and generally well-tolerated dose for supporting bone health and immune function. This product provides a strong daily amount, but you should be aware of how it interacts with calcium, as vitamin D helps your body absorb calcium [NIH ODS].
How it works
Think of vitamin D as a master regulator — it helps your body absorb calcium from your diet to support bone mineralization and neuromuscular relaxation [NIH ODS]. This process is critical for maintaining bone density and ensuring your muscles and nerves function properly [NIH ODS].
Safety profile
Data not available for this specific product's side effects. However, the FDA has received a total of 592,059 adverse event reports for all supplements, and high calcium levels (a risk with excessive vitamin D) can cause constipation, nausea, weight loss, and abnormal heart rhythms [FDA data] [NIH ODS]. Be cautious if you take medications like bisphosphonates or levothyroxine, as calcium can reduce their absorption [NIH ODS].
Our recommendation
This 2000 IU dose is appropriate for many adults, but you should not exceed 4,000 IU daily without medical supervision. Start by taking one softgel daily with food. If you take other medications, separate your dose by at least two hours [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Kirkland Signature |
|---|---|
| Serving Size | |
| Contents | 600.0 Softgel(s) |
| 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