Advanced Naturals FiberMax Caps
Brand: Advanced Naturals · Form: CAPSULE [E0159]
Our assessment
The evidence shows that Advanced Naturals FiberMax Caps, which contains calcium, is a supplement you should approach with caution. While calcium is essential for bone health, the data reveals significant risks that require careful management. Our assessment is that this product may be beneficial for you only if you have a confirmed calcium deficiency, but the potential for adverse effects is substantial and must not be overlooked [NIH ODS] [FDA data].
How it works
Think of calcium as a structural builder and a nerve signaler. It works primarily through bone mineralization, supporting bone density and mineral deposition, and through neuromuscular relaxation, which supports muscle relaxation and nerve signaling. If you are not getting enough calcium from your diet, this supplement could help fill that gap [NIH ODS].
Safety profile
The FDA has received a total of 592,059 adverse event reports across all supplements, which underscores the importance of vigilance. For calcium specifically, the data shows that high intakes might increase your 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]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Our recommendation is that you do not take Advanced Naturals FiberMax Caps without first consulting your doctor and getting a blood test to confirm a true calcium deficiency. The risks of high calcium intake are serious and well-documented. If you are on any medications, especially those listed for interactions, you should avoid this product. A balanced diet is the safest way to meet your calcium needs [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Advanced Naturals |
|---|---|
| Serving Size | |
| Contents | 200.0 Vegetable 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