Culturelle Ultimate Strength Probiotic
Brand: Culturelle · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that Culturelle Ultimate Strength Probiotic is a widely used supplement, but specific clinical data on this exact formulation is limited. For the ingredient calcium, which is a key mineral often paired with probiotics, the data confirms it supports bone mineralization and neuromuscular relaxation [NIH ODS]. However, we must be clear: the bulk of the research we have is on calcium, not the probiotic blend itself. You should not expect the same level of evidence for the probiotic component as you would for a well-studied mineral.
How it works
Calcium acts as a master regulator for your bones and muscles. It helps deposit minerals into your skeleton to maintain bone density and supports the relaxation of your muscles and nerves after they contract [NIH ODS]. While probiotics typically work by supporting gut bacteria, the data provided does not include a specific mechanism for the probiotic strain in this product. For calcium, think of it as the structural support your body needs daily, but you must be aware of its interactions.
Safety profile
Safety data is critical here. The FDA has received a total of 592,059 adverse event reports across all supplements, but a specific count for this product is not available. For calcium specifically, high intakes can increase the risk of heart disease and prostate cancer [NIH ODS]. Side effects from excessive calcium include poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Additionally, calcium can reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Our recommendation is to approach this product with caution. If you take any prescription medications, especially thyroid medication or antibiotics, take this product at least 2 hours apart from them [NIH ODS]. Do not exceed the label dosage, and be aware that high calcium intake from all sources (food + supplements) may pose heart risks. For the probiotic component, data on specific health outcomes is not available. Start with one capsule daily and monitor for nausea or constipation. If you have a history of kidney stones or heart disease, consult your doctor before use.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Culturelle |
|---|---|
| Serving Size | |
| Contents | 30.0 Once Daily Vegetarian 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