Product Label

21st Century Acidophilus Probiotic Blend

Brand: 21st Century · Form: CAPSULE [E0159] On Market

Our assessment

The evidence shows that 21st Century Acidophilus Probiotic Blend is a supplement containing calcium. Based on the data provided, we can only assess the calcium component, as specific data on the probiotic blend itself is not available. Our assessment focuses on the calcium content and its known effects on the body.

How it works

Calcium plays a critical role in your body as a mineral. It supports bone density and mineral deposition through a process called bone mineralization. Additionally, it helps your muscles relax and supports nerve signaling, which is essential for neuromuscular function [NIH ODS].

Safety profile

Data not available for the specific probiotic blend. However, the FDA has received a total of 592,059 adverse event reports related to dietary supplements broadly. For the calcium component, high intakes may increase the risk of heart disease and prostate cancer. Very high levels of calcium in your blood and urine can lead to 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].

Our recommendation

Because no specific data on the probiotic blend's efficacy or safety was provided, we cannot make a confident recommendation for this product. If you are taking any medications, be aware that calcium can reduce the absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. We recommend consulting your healthcare provider before starting this supplement.

AI-assisted analysis. Data sourced from NIH DSLD.

Supplement Facts

Brand21st Century
Serving Size
Contents100.0 Capsule(s)
Market StatusOn 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

Original Label

View Full DSLD Label (PDF)

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