Optimum Nutrition (ON, Glanbia) Essential Amino Energy Concord Grape

Our assessment

The evidence shows that Optimum Nutrition Essential Amino Energy Concord Grape is a supplement designed to provide amino acids and caffeine for energy and focus. Based on the data provided, the formula includes calcium, which plays a role in bone mineralization and neuromuscular relaxation [NIH ODS]. However, we must be direct: the data does not specify the exact amount of calcium per serving, the specific amino acid profile, or the caffeine content for this product. You should rely on the product label for these critical details, as our analysis is limited to the data provided.

How it works

Think of this supplement as a combination of two functional components. The amino acids are intended to support muscle recovery and reduce exercise fatigue, while caffeine provides a stimulant effect to improve alertness. The calcium present supports bone mineralization by aiding in mineral deposition and supports neuromuscular relaxation for proper nerve signaling and muscle function [NIH ODS]. The specific mechanisms for the amino acid blend are not detailed in the data provided.

Safety profile

The FDA has received a total of 592,059 adverse event reports across all dietary supplements, but specific report counts for this product are not available in the data [FDA data]. Regarding calcium, a key ingredient listed, high intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. Elevated calcium levels can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Additionally, calcium can reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available for side effects specific to the amino acid or caffeine content of this product.

Our recommendation

You should start by carefully reading the product label to confirm the exact amounts of caffeine, amino acids, and calcium per serving. Because the data does not provide a complete ingredient profile or specific dosing, we cannot recommend a serving size. If you take any prescription medications, especially those listed above, consult your doctor or pharmacist before use due to potential calcium interactions [NIH ODS]. For most people, this product is likely safe for occasional use as a pre-workout or energy drink, but do not exceed the serving size on the label.

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