Major ProSight

Our assessment

The evidence shows that Major ProSight contains calcium as its primary active ingredient, and calcium is a mineral with well-established benefits for bone health. However, you need to be aware that this supplement carries notable safety considerations. Our assessment is that calcium supplementation can be beneficial for many people, but it is not without risks, and you must approach it with caution [NIH ODS].

How it works

Calcium acts as a bone mineralization agent, meaning it supports bone density and the deposition of minerals into your skeletal structure. It also plays a critical role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly after they have been activated [NIH ODS]. Think of calcium as the raw material your body uses to keep your bones strong and your nervous system functioning smoothly.

Safety profile

Data not available for specific side effect report counts for this product. However, the FDA has received a total of 592,059 adverse event reports for all products in this category. 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]. You should also know that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Our recommendation is to use calcium supplements only if you are confident you are not meeting your needs through diet alone. You should not exceed the recommended daily allowance without a healthcare provider's guidance. If you take any of the medications listed above, take calcium at a different time of day to avoid absorption issues [NIH ODS]. Talk to your doctor before starting this supplement, especially if you have a history of kidney stones, heart disease, or prostate cancer. Data not available for a specific starting dose for Major ProSight.

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