Doctor's Best Sustained Release Vitamin C With PureWay-C
Brand: Doctor's Best · Form: TABLET [E0155]
Our assessment
The evidence shows that Doctor's Best Sustained Release Vitamin C With PureWay-C is not the product you are asking about. Based on the data provided, you appear to be inquiring about a calcium supplement. Our assessment: calcium is a well-studied mineral, but it comes with important safety considerations you need to know. The data confirms that calcium supports bone density and muscle relaxation [NIH ODS]. However, high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS].
How it works
Think of calcium as a master builder — it supports bone mineralization by helping deposit minerals into your skeletal structure, and it also supports neuromuscular relaxation by aiding nerve signaling and muscle relaxation [NIH ODS]. This dual role makes calcium essential for both your bones and your muscle function.
Safety profile
FDA received 592,059 total adverse event reports for all supplement ingredients, but specific report counts for calcium alone are not provided in the data. 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]. Calcium can also reduce the absorption of several medications including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Start with food sources of calcium before considering supplements. If you choose to supplement, be aware that high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Take calcium separately from your medications by at least 2 hours to avoid absorption issues [NIH ODS]. Data not available on the specific product Doctor's Best Sustained Release Vitamin C With PureWay-C — the data provided only covers calcium, not vitamin C.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Doctor's Best |
|---|---|
| Serving Size | |
| Contents | 60.0 Tablet(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