Qualitest Pharmaceuticals Natural Vegetable Fiber Regular Flavor

Our assessment

The evidence shows that the active ingredient in this product is calcium. Our assessment: for bone health, calcium is a foundational nutrient, but you need to be careful with dosing and potential risks. The data does not provide a specific daily value or recommended intake for this particular product, so we must rely on general guidance for calcium [NIH ODS].

How it works

Think of calcium as a building block and a signaler. It supports bone mineralization, helping your skeleton stay dense and strong. It also plays a key role in neuromuscular relaxation, meaning it helps your muscles relax and your nerves send signals properly after they fire [NIH ODS].

Safety profile

FDA received a total of 592,059 adverse event reports for this product category. For calcium specifically, side effects can include constipation and nausea. High calcium intakes might increase the risk of heart disease and prostate cancer. Very high levels in the blood 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. Calcium can also reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [FDA data] [NIH ODS].

Our recommendation

Start by reviewing the label for the exact amount of calcium per serving, as this data is not available here. Do not exceed 2,500 mg of total calcium daily from all sources (food and supplements). Take calcium supplements with food to improve absorption. If you take any of the medications listed, separate your calcium dose by at least 2 hours. Always consult your doctor before starting a new supplement, especially if you have a history of kidney stones or heart disease [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