Kirkman Calcium With Vitamin D-3 Powder Flavored
Brand: Kirkman · Form: POWDER [E0162] On Market
Our assessment
The evidence shows that this Kirkman product provides calcium and vitamin D-3, two nutrients essential for bone health. Our assessment is that it can be an effective option for supporting your skeletal system, but you must be mindful of the specific safety considerations for calcium, especially regarding total daily intake from all sources.
How it works
Think of calcium as the primary building block for your bones, supporting bone density and mineral deposition [NIH ODS]. The vitamin D-3 in this formula acts as a master regulator to help your body absorb that calcium effectively. Additionally, calcium plays a role in neuromuscular relaxation, supporting proper muscle and nerve signaling [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplement products. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Very high levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Crucially, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
We recommend using this product only after assessing your total daily calcium intake from food and other supplements to avoid exceeding safe levels. You should take this supplement at a different time than any of the listed medications to prevent absorption issues [NIH ODS]. Consult your healthcare provider before starting, especially if you have a history of kidney problems or heart disease.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Kirkman |
|---|---|
| Serving Size | |
| Contents | 454.0 Gram(s) 16.0 oz. |
| 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