Optimum Nutrition
Optimum Nutrition Amino Energy
- Caffeine 100 mg
- Beta-Alanine None listed
- Container Size 9.5 oz
100 mg of caffeine and aminos, with none of the beta-alanine tingle.
The tingle people complain about in pre-workout comes from beta-alanine, and the simplest way to dodge it is to leave the pre-workout aisle. Optimum Nutrition sells Amino Energy as an amino acid drink — an amino blend with 100 mg of caffeine — and that is exactly why there is no beta-alanine in the formula. It is a powder you mix in a shaker and drink before training, nothing more complicated than that.
What we noticed first is how much a smaller caffeine dose buys you in flexibility. One scoop is a gentle lift; two scoops, which is how plenty of people drink it, lands near a strong cup of coffee, and neither version comes with the itchy scalp. The watermelon is the best flavor of the four here — sweet, close to a Jolly Rancher — and it dissolves in a shaker without the grit heavier pre-workouts leave behind.
A hundred milligrams is also the catch. Come to this from a 300 mg tub and the first scoop feels like nothing, and once you are at two scoops a session the container empties twice as fast. The powder settles in transit as well, so the tub looks half empty on arrival; judge it by how long it lasts rather than by the fill line.
What earns it the top spot is that it does not need a workout to make sense. It is the only pick here you can drink at three in the afternoon without writing off the evening, and the one we restock without thinking about it.
Bottom Line
Our pick if you want energy before training without the beta-alanine tingle: 100 mg of caffeine you can halve or double by the scoop, in a flavor you'll actually finish.
What We Like
- 100 mg caffeine you can halve or double by the scoop
- Watermelon flavor is genuinely drinkable
- Mixes clean in a shaker without grit
- Works as an afternoon drink, not just pre-gym
Worth Noting
- 100 mg is modest for high-tolerance users
- Powder settles well below the rim in transit