Sundown Naturals Probiotic Acidophilus Xtra
Brand: Sundown Naturals · Form: SUPPLEMENT FORM, OTHER [E0172]
Our assessment
The evidence shows that Sundown Naturals Probiotic Acidophilus Xtra is a product for which very little specific clinical data is available. Our assessment is that without specific ingredient amounts or a detailed formula, we cannot confirm the strength or efficacy of this particular probiotic. The only data we can reliably discuss is the general role of calcium, which is often included in probiotic formulations as a stabilizer. Data not available for the specific probiotic strains in this product.
How it works
If this product contains calcium, think of it as a structural mineral — it supports bone mineralization and helps with neuromuscular relaxation, meaning it helps your muscles contract and your nerves send signals properly [NIH ODS]. For the probiotic component itself, data on its specific mechanism is not available.
Safety profile
The FDA has received a total of 592,059 adverse event reports across all supplement categories [FDA data]. For the calcium component specifically, high levels can cause constipation, nausea, and abnormal heart rhythms [NIH ODS]. Calcium can also reduce the absorption of medications like antibiotics and levothyroxine [NIH ODS]. Data on side effects specific to the probiotic strains in this product is not available.
Our recommendation
We recommend you choose a probiotic with a clearly labeled strength in CFUs (colony-forming units) and specific strain names. For calcium, stick to the RDA of 1,000–1,200 mg daily from food and supplements combined [NIH ODS]. Do not take this product within two hours of taking prescription medications like antibiotics or thyroid medication [NIH ODS]. When in doubt, consult your personal physician or pharmacist.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 120.0 Caplet(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