Swanson Ultra Probiotic Complex

Our assessment

The evidence shows that Swanson Ultra Probiotic Complex is a product whose primary active ingredient per the data provided is Calcium. Our assessment is that this supplement can support bone health, but you should be aware of significant safety considerations and potential medication interactions. The data does not provide specific probiotic strains or colony-forming units (CFUs) for this product, so we cannot evaluate its probiotic efficacy.

How it works

Calcium functions as a master regulator for your skeleton and nervous system. It supports bone mineralization and density, and also plays a role in neuromuscular relaxation and nerve signaling [NIH ODS]. Think of it as the structural foundation for your bones and a key player in how your muscles and nerves communicate.

Safety profile

FDA has received a total of 592,059 adverse event reports for all products in its database. Specific side effects from high calcium intake include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. High calcium intakes might also increase the risk of heart disease and prostate cancer [NIH ODS]. High levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, and low phosphate levels [NIH ODS].

Our recommendation

Before taking this product, you should consider that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available on specific probiotic strains or dosages for this product. We recommend consulting your doctor to review your current calcium intake from all sources and to check for any medication interactions before starting this supplement.

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