Jarrow Formulas Fiber Perfect
Brand: Jarrow Formulas · Form: CAPSULE [E0159]
Our assessment
The evidence shows that while Jarrow Formulas Fiber Perfect is a dietary supplement, its primary active ingredient is Calcium. Our assessment is that you should be cautious: the data on calcium supplementation is complex, and high intakes carry notable risks. For most people, obtaining calcium from food is safer than relying on supplements [NIH ODS].
How it works
Calcium plays a critical role in your body. Think of it as a structural builder for your bones, supporting bone density and mineral deposition. It also acts as a signaling agent for your muscles and nerves, helping with neuromuscular relaxation and nerve signaling [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports across all dietary supplements. For calcium specifically, some research suggests that high intakes might increase the risk of heart disease and prostate cancer. High levels of calcium in your 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] [FDA data].
Our recommendation
We recommend you do not take this supplement to boost your calcium intake without first consulting your doctor. Calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available on the specific fiber blend in this product. Prioritize calcium from dietary sources like dairy or fortified foods [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Jarrow Formulas |
|---|---|
| Serving Size | |
| Contents | 150.0 Capsule(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