Now Sports Amino Power Pre-Workout Natural Raspberry Flavor

Our assessment

The evidence shows that Now Sports Amino Power Pre-Workout contains calcium, which is a mineral with a well-established role in the body. However, the data provided only covers calcium as a single ingredient, not the complete formula of this product. Our assessment is that while calcium can be a useful addition to a pre-workout, you should be aware of its specific risks and interactions, as the full effects of this blend are not detailed in the data we have.

How it works

Calcium in this product acts as a master regulator for your muscles and nerves. It supports neuromuscular relaxation, meaning it helps your muscles relax after contracting, and it also aids in nerve signaling, which is crucial for coordinating movement during exercise [NIH ODS]. Additionally, calcium plays a role in bone mineralization, supporting bone density and mineral deposition, which is important for overall skeletal health during physical activity [NIH ODS].

Safety profile

The FDA has received a total of 592,059 adverse event reports across all supplements, but a specific count for this product or its calcium content is not available. Regarding calcium specifically, very high intakes can lead to poor muscle tone, constipation, nausea, weight loss, and abnormal heart rhythms [NIH ODS]. Some research also suggests that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. You should be cautious if you take medications, as calcium can reduce the absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Based on the data provided, we cannot recommend this product for general use because we lack information on the other active ingredients and their combined effects. If you choose to use it, be aware of the calcium content. Do not take it with other calcium supplements or within two hours of the medications listed above. For a personalized assessment, consult your healthcare provider, as the safety data for this specific blend is not available.

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