Lifestyle Fitness & Nutrition Amino Acid Complete 1000

Our assessment

The evidence shows that this product supplies 1,000 mg of calcium per serving. For most adults, the recommended daily allowance for calcium is 1,000 to 1,200 mg, so this supplement can help you meet your needs, especially if your diet is low in dairy or fortified foods [NIH ODS]. However, you must account for the calcium you get from food to avoid exceeding safe levels.

How it works

Calcium is a mineral essential for bone mineralization, helping to deposit and maintain bone density. It also supports neuromuscular relaxation and nerve signaling, which is why your muscles and nerves depend on it for proper function [NIH ODS]. Think of it as a building block that keeps your skeleton strong and your nervous system communicating effectively.

Safety profile

Data not available for specific side effects of this product. The FDA has received a total of 592,059 adverse event reports across all dietary supplements. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. Very 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 [FDA data] [NIH ODS]. Calcium can also reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Start by calculating your daily calcium intake from food sources. If you need a supplement, take this product with food to improve absorption. Do not exceed 2,000 mg of total calcium per day from all sources. If you take any of the listed medications, separate your calcium dose by at least two hours [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