GNC Ultra Probiotic Complex 100 Unflavored
Brand: GNC · Form: SUPPLEMENT FORM, OTHER [E0172] On Market
Our assessment
The evidence shows that this product contains calcium, which is a mineral essential for bone health. For most adults, getting sufficient calcium through diet is the preferred approach, but supplements can help fill gaps [NIH ODS]. Data on this specific GNC product's efficacy beyond its ingredient list is not available, so we focus on the well-documented effects of calcium itself.
How it works
Calcium acts as a master regulator in your body. It directly supports bone mineralization and density, and it is critical for neuromuscular relaxation and proper nerve signaling [NIH ODS]. Think of it as the key that helps your muscles relax after contracting and your nerves send clear messages.
Safety profile
The FDA received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Very high levels of calcium in the blood and urine can cause 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]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Before starting this supplement, check your total calcium intake from food and other supplements. Do not exceed the tolerable upper intake level unless directed by your doctor. If you take any medications listed above, take calcium at a different time of day. Speak with your healthcare provider to determine if this supplement is right for you [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 20.0 Packet(s) 2.4 Oz(s) 68.0 Gram(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