NOW Prebiotic Fiber with Fibersol-2
Brand: NOW · Form: POWDER [E0162] On Market
Our assessment
The evidence shows that NOW Prebiotic Fiber with Fibersol-2 is a fiber supplement, and we are analyzing its primary ingredient as listed in the available data. Based on the provided information, the product contains calcium, and our assessment focuses on that ingredient. For the specific prebiotic fiber component, data is not available in the provided materials.
How it works
Think of the calcium in this product as a structural support for your body. It supports bone density and mineral deposition through bone mineralization, and it also helps with neuromuscular relaxation, meaning it aids in muscle relaxation and nerve signaling [NIH ODS].
Safety profile
The FDA received a total of 592,059 adverse event reports across all supplements, though a specific count for this product is not available. For the calcium ingredient, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels 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
Our recommendation is to be cautious with this product if you are already taking a calcium supplement or have a condition that affects calcium levels. Because the specific prebiotic fiber data is not available, you should consult your healthcare provider before starting this supplement, especially if you take any of the medications listed in the safety profile [NIH ODS] [FDA data].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 12.0 oz. 340.0 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