Product Label

Natrol Acidophilus Probiotic

Brand: Natrol · Form: CAPSULE [E0159] On Market

Our assessment

The evidence shows that while the product is labeled as a probiotic, the data provided focuses on calcium as a key ingredient. Our assessment is that calcium is essential for bone health, but the specific benefits of this probiotic formulation are not supported by the data available here [NIH ODS].

How it works

Think of calcium as a structural building block for your bones. It supports bone density and mineralization, and it also plays a role in neuromuscular relaxation to help your muscles and nerves function properly [NIH ODS]. The specific mechanism of the probiotic strains in this product is not described in the data.

Safety profile

FDA received 592,059 total adverse event reports across all supplement categories. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Side effects from very high calcium levels include poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Report counts for these specific side effects are not available in the data.

Our recommendation

Before starting any new supplement, consult your healthcare provider to see if it is right for you. If you are considering this for calcium, be aware that it can reduce absorption of certain medications, including bisphosphonates, tetracycline and fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data on the specific benefits, dosage, and interactions of the probiotic strains in this product is not available.

AI-assisted analysis. Data sourced from NIH DSLD.

Supplement Facts

BrandNatrol
Serving Size
Contents150.0 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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