Meet the Optimum Nutrition Amino Energy - Pre Workout with Green Tea by Optimum Nutrition — a product built with performance in mind.
A BCAA formula designed to help protect muscle and speed up recovery between sessions.
Optimum Nutrition's BCAA supplement supports muscle recovery and reduces exercise-induced fatigue.
Informed Sport certified, meaning every batch is tested for banned substances and purity.
Formulated to help sustain energy levels throughout your day or workout.
Suitable for vegetarians, so you can supplement confidently on a plant-inclusive diet.
Strikes a good balance between quality ingredients and reasonable pricing.
Available at $49.99 — a competitive price point for the US market.
If Optimum Nutrition is a brand you trust, this product reinforces that confidence.
The brand behind this product — their story and what they stand for.
Trusted American sports nutrition brand since 1986. Gold Standard Whey is the world's best-selling protein powder, backed by decades of quality manufacturing.
Understand which fitness goals this product is best suited for.
Energy & Performance
Designed to fuel intense workouts and sustain energy levels throughout your training session.
Fat Loss
Helps maintain lean muscle during a caloric deficit. Pair with a structured workout and nutrition plan.
Muscle Gain
Supports muscle growth and recovery when combined with resistance training and a protein-rich diet.
Track how the price has changed over the last 90 days on Amazon.com.
Step-by-step usage instructions so you get the most out of every serving.
Mix 1 scoop with 400–500ml of cold water.
Sip during your workout (intra-workout) or immediately after training.
Can also be taken between meals on rest days for recovery support.
If you already consume enough protein (1.6–2g/kg body weight), BCAAs may offer diminishing returns.
See how this product compares to similar options in its category.
| This Product | Nutricost | Nature's Trove | NOW Foods | |
|---|---|---|---|---|
| Price | $49.99 | $15.95 | $9.98 | $6.92 |
| Per Serving | - | - | - | - |
| Servings | — | — | — | — |
| Lab Tested | ✓ | ✓ | ✗ | ✓ |
| Rating | 4.6 ★ | 4.6 ★ | 4.6 ★ | 4.6 ★ |
Common questions about this product — answered clearly and honestly.
Yes, this product is vegetarian-friendly. It does not contain any non-vegetarian ingredients.
Yes, this product has been lab tested by Informed Sport. Third-party lab testing verifies that the product contains what the label claims, giving you confidence in its quality and purity.

Nutricost
Nutricost N-Acetyl L-Cysteine (NAC) 600mg, 180 Capsules - Non-GMO, Gluten Free

Nature's Trove
Nature's Trove L-Theanine 200mg 120 Vegetarian Capsules

NOW Foods
NOW Foods Supplements, (L-Lysine Hydrochloride) 1,000 mg, Double Strength, Amino Acid, 100 Tablets

NOW Foods
NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
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