Medifood Ultra Fiber Plus

Our assessment

The evidence shows that Medifood Ultra Fiber Plus contains calcium, a mineral that supports bone mineralization and neuromuscular relaxation [NIH ODS]. However, based on the data provided, we cannot determine the specific amount of calcium in this product or its other ingredients, as that information is listed as "See label" [Product Data]. Our assessment is that while calcium has well-documented benefits, you need to check the product label for the exact dosage and full ingredient list before use [NIH ODS].

How it works

Think of calcium as a structural building block for your skeleton. It supports bone density through mineralization and helps your muscles relax properly after contracting, which is essential for nerve signaling [NIH ODS]. Without adequate calcium, your body will pull it from your bones to maintain blood levels, which can weaken your skeleton over time [NIH ODS].

Safety profile

The FDA has received a total of 592,059 adverse event reports across all supplements, but specific report counts for this product are not available [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. Excess calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, 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

Data not available to make a specific dosing recommendation for Medifood Ultra Fiber Plus. You should read the product label for the serving size and calcium content. If you take any medications, especially thyroid medication or antibiotics, take calcium at least two hours apart to avoid absorption issues [NIH ODS]. For general calcium guidance, the RDA for most adults is 1,000 to 1,200 mg daily from food and supplements combined, but do not exceed the tolerable upper intake level without medical supervision [NIH ODS].

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