21st Century Acidophilus Probiotic Blend
Brand: 21st Century · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that this product contains calcium, but data on the specific “Acidophilus Probiotic Blend” formula is limited. For calcium, the benefits for bone density are well-documented, but you need to be careful with dosing and timing relative to other medications [NIH ODS].
How it works
Calcium acts as a master regulator for your bones and muscles. It supports bone mineralization and density, and it helps your muscles relax and your nerves signal properly [NIH ODS]. Without enough calcium, your body may pull it from your bones, weakening them over time.
Safety profile
There are 592,059 total adverse event reports on file with the FDA for this product category. Specific side effects reported with calcium include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, and abnormal heart rhythms. High levels of calcium in your blood and urine can also cause poor muscle tone and poor kidney function [FDA data] [NIH ODS].
Our recommendation
Take calcium supplements at least 2 hours apart from medications like thyroid hormone (levothyroxine), certain antibiotics, and osteoporosis drugs to avoid absorption issues [NIH ODS]. Do not exceed the recommended dose on the label, as high intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. For the probiotic portion of this blend, data on specific benefits is not available.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 150.0 Capsule(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