Optimum Nutrition - Amino Energy

Optimum Nutrition Essential AMIN.O. ENERGY is the original "anytime energy" amino acid powder — the product that defined a category when it launched and has remained one of the best-selling amino powders in the world for over a decade. Per 2-scoop serving: 5,000mg of the Amino Blend (a 14-compound micronized free-form amino acid complex including BCAAs, EAAs, Taurine, L-Glutamine, L-Arginine, L-Citrulline, CarnoSyn® Beta-Alanine, and additional essential amino acids) plus 100mg of natural caffeine from the Energy Blend (Green Tea, Green Tea Extract standardized for EGCG, and Green Coffee Extract). 5-10 calories per serving. Zero sugar. No aspartame. Informed Choice certified — banned substance tested. 30 servings per 270g container. Mix 2 scoops in 10-12oz water. Dosing is flexible: 1 scoop (50mg caffeine) as a light pick-me-up, 2 scoops (100mg caffeine) as a moderate energy and amino serving, or 3 scoops pre-workout (150mg caffeine) for full pre-workout support. Available in over 13 flavors. California Prop 65 Warning applies.*

Supplement Facts — Optimum Nutrition Essential AMIN.O. ENERGY (Per 2 Scoops / 9g / 30 Servings)

Amino Blend — 5,000mg (Proprietary Blend)

• Micronized Taurine
• Micronized L-Glutamine
• Micronized L-Arginine
• Micronized L-Leucine
• CarnoSyn® Beta-Alanine
• Micronized L-Citrulline
• Micronized L-Isoleucine
• Micronized L-Valine
• Micronized L-Tyrosine
• Micronized L-Histidine
• Micronized L-Lysine HCl
• Micronized L-Phenylalanine
• Micronized L-Threonine
• Micronized L-Methionine

Energy Blend — 160mg (Proprietary Blend / 100mg Caffeine Delivered)

• Caffeine (from Green Tea)
• Green Tea Extract (Camellia sinensis, Leaf — standardized for EGCG)
• Green Coffee Extract

• Calories: 5-10 per serving. Total Carbohydrate: 1g. Zero sugar. No aspartame.
• Caffeine content: 50mg per scoop / 100mg per 2-scoop serving / 150mg per 3-scoop serving
• Other Ingredients: Citric Acid, Malic Acid, Natural and Artificial Flavors, Inulin, Beet Color (some flavors), Tartaric Acid, Silicon Dioxide, Calcium Silicate, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sucralose, Lecithin
• Note: Amino Blend is a proprietary formula — individual amino acid doses within the 5g total are not disclosed on the label
• 270g per container — 30 two-scoop servings
• Informed Choice certified — banned substance tested for over 250 WADA-prohibited substances
• 14+ available flavors

What Amino Energy Actually Is — and Why It Works for So Many Different Use Cases

AMIN.O. ENERGY's staying power in a crowded market comes from solving a specific problem elegantly: most energy products don't include amino acids, and most amino acid products don't include energy support. Coffee gives you caffeine without amino acids. BCAAs give you amino acids without energy. Pre-workouts give you too much of both — 300-400mg caffeine at doses designed for maximum-intensity training, not a 2pm desk session or an early morning commute. AMIN.O. ENERGY fits the gap that none of these cover: a moderate, stackable dose of natural caffeine alongside a broad-spectrum amino acid complex, in a great-tasting powder that works at any time of day without overstimulating.†

The dosing flexibility is central to the product's versatility. At 50mg caffeine per scoop, you can calibrate your serving to exactly what you need: half a cup of coffee-equivalent at one scoop for a light morning addition to an existing routine, a full moderate energy boost at two scoops as a standalone mid-morning drink, or a meaningful pre-workout amino and energy combination at three scoops for training days. The amino acid content stays proportional — each scoop adds 2,500mg of the amino blend. This adjustability is what makes AMIN.O. ENERGY work as a pre-workout for some users, a mid-day pick-me-up for others, and a post-workout amino replenishment for a third group — often the same person using it differently on different days.†

The Amino Blend — 14 Micronized Free-Form Amino Acids

The Amino Blend contains 14 distinct free-form amino acids delivered in micronized form — processed to a fine particle size for rapid dissolution and absorption. Free-form amino acids require no digestion before absorption: they are already in the single amino acid form that the intestinal epithelium absorbs directly, without requiring the proteolytic enzyme breakdown that dietary protein or peptide-bonded amino acids require. This makes free-form aminos the fastest-absorbing amino acid format available.†

The 14-compound blend covers multiple functional amino acid categories simultaneously. The BCAAs — L-Leucine, L-Isoleucine, and L-Valine — provide the primary muscle protein synthesis signaling (particularly Leucine's mTOR activation) and energy substrate during exercise. The essential amino acids — L-Histidine, L-Lysine, L-Phenylalanine, L-Threonine, and L-Methionine — complete the full EAA profile required for muscle protein synthesis, which cannot proceed without all nine EAAs present. L-Glutamine provides the most abundant intramuscular amino acid for recovery support. Taurine provides anti-fatigue and cardiovascular performance support. L-Arginine and L-Citrulline contribute to nitric oxide production for blood flow and pump support. L-Tyrosine provides catecholamine precursor support for focus. CarnoSyn® Beta-Alanine provides the carnosine-building precursor for muscle endurance buffering.†

The proprietary blend designation means the individual doses within the 5g total are not disclosed — a limitation that prevents precise comparison with products that use fully transparent labeling. What is confirmed: at 5g total across 14 compounds with Taurine listed first (largest amount by convention of FDA label rules) and L-Methionine listed last (smallest amount), the formula is frontloaded toward the most impactful compounds by weight. The total 5g is a moderate amino acid dose — meaningful for recovery support and as a complement to training nutrition, though below the 7-10g doses used in some of the more heavily dosed BCAA and EAA products.†

Natural Caffeine — Why Green Tea and Coffee Bean Sources Matter

AMIN.O. ENERGY's caffeine comes exclusively from natural botanical sources — Green Tea (Camellia sinensis leaf), Green Tea Extract (standardized for EGCG), and Green Coffee Extract — rather than synthetic Caffeine Anhydrous. Natural caffeine sources produce the same adenosine antagonism and CNS stimulant effects as synthetic caffeine, but the plant matrix provides additional co-occurring bioactive compounds. Green Tea delivers EGCG (the catechin antioxidant with documented thermogenic and fat oxidation effects), L-Theanine (the amino acid that smooths caffeine's edge), and a broad antioxidant polyphenol profile. Green Coffee Extract provides chlorogenic acids with documented metabolic benefits. The net effect is that AMIN.O. ENERGY's 100mg of natural caffeine is accompanied by meaningful quantities of complementary bioactive compounds that synthetic caffeine anhydrous doesn't provide.†

The Six Ways People Use AMIN.O. ENERGY

First: as a morning coffee replacement — one or two scoops in cold water before breakfast for a lower-calorie, amino acid-enriched alternative to coffee or a morning energy drink. Second: as a pre-workout for moderate-intensity training days — two to three scoops 20-30 minutes before training provides 100-150mg caffeine plus the full amino blend for energy, focus, and amino acid availability during the session. Third: as an intra-workout amino drink — one to two scoops during training for amino acid delivery and light energy support during longer or higher-volume sessions. Fourth: as a post-workout amino recovery drink — two scoops immediately after training for amino acid replenishment and recovery support. Fifth: as an afternoon energy drink — two scoops replacing a second cup of coffee or an energy drink for a moderate, low-calorie energy boost with functional amino acid content. Sixth: as a flavor-first gym drink — AMIN.O. ENERGY has one of the best flavor profiles in the amino/energy category, and many users choose it simply as a better-tasting way to drink their way through a training session.†

Informed Choice Certification — What It Means

Optimum Nutrition's AMIN.O. ENERGY carries Informed Choice certification — independent third-party testing for over 250 substances prohibited by WADA and major sports governing bodies. Every batch tested prior to consumer availability. For competitive athletes in tested sports, Informed Choice is one of the most rigorous third-party verification standards in the supplement industry. The certification confirms what the formula already indicates: AMIN.O. ENERGY contains no prohibited stimulants, no prohormones, no peptide hormones, and no compounds of any regulatory concern.†

Optimum Nutrition — The Brand Behind AMIN.O. ENERGY

Optimum Nutrition is the world's number one sports nutrition brand by retail value — a position confirmed annually by Euromonitor International. Founded in 1986 and now owned by Glanbia, ON's manufacturing, quality control, and third-party testing standards are among the most rigorous in the industry. Gold Standard 100% Whey — their protein powder — is consistently the best-selling protein supplement in the world. AMIN.O. ENERGY is the brand's flagship amino and anytime energy product, maintaining its market position through consistent quality, exceptional flavor development, and the Informed Choice certification that gives competitive athletes confidence in the product's safety profile.†

Frequently Asked Questions

1. How does AMIN.O. ENERGY compare to a standard pre-workout?
   AMIN.O. ENERGY is not a pre-workout in the traditional sense — it is an anytime energy and amino product that can function as a light pre-workout at higher doses. Standard pre-workouts contain 200-400mg caffeine, dedicated pump ingredients (Citrulline Malate at 6-10g), Beta-Alanine at full 3,200mg clinical doses, and multiple performance-specific compounds at therapeutic dosages. AMIN.O. ENERGY contains 100mg natural caffeine and 5g of a 14-compound amino blend at a 2-scoop serving — more versatile for daily anytime use but less specialized for maximum training performance than a dedicated pre-workout. For serious training sessions, AMIN.O. ENERGY at 3 scoops (150mg caffeine) can serve as a light pre-workout. For maximum performance, a dedicated pre-workout is more appropriate.†
2. Can AMIN.O. ENERGY be taken multiple times per day?
   Yes — this is part of its design. At 50mg caffeine per scoop, even two separate two-scoop servings in a day totals only 200mg caffeine — well within safe daily caffeine intake for most adults (400mg is the FDA's general safe limit). Many users take two scoops in the morning and two scoops pre-workout, or two scoops mid-morning and two scoops in the early afternoon. Avoid taking after 5pm if caffeine sensitivity affects sleep.†
3. Is AMIN.O. ENERGY appropriate for tested athletes?
   Yes. Informed Choice certification confirms AMIN.O. ENERGY has been independently tested for prohibited substances. The formula contains no banned stimulants, no prohormones, and no compounds of regulatory concern. It is one of the most consistently recommended amino/energy products for competitive athletes specifically because of its third-party testing track record.†
4. Why is it called AMIN.O. ENERGY instead of Amino Energy?
   The "AMIN.O." styling in Optimum Nutrition's branding incorporates the "O" from Optimum in the product name — a brand identity device that ties the product visually to the ON brand. The full product name is Essential AMIN.O. ENERGY, commonly shortened to Amino Energy in retail and consumer contexts. Both refer to the same product.†

How to Take Optimum Nutrition AMIN.O. ENERGY

Mix 2 scoops (9g) in 10-12oz of cold water. For a stronger or lighter effect, adjust to 1-3 scoops depending on your caffeine tolerance and purpose: 1 scoop for a light pick-me-up (50mg caffeine), 2 scoops for moderate energy and amino support (100mg caffeine), 3 scoops pre-workout for additional energy (150mg caffeine). Timing: first thing in the morning for morning energy, 20-30 minutes before training for pre-workout support, during training as an intra-workout amino drink, or any time of day as an afternoon energy boost. Avoid after 5pm if caffeine affects your sleep. Not for persons under 18. Not for pregnant or nursing women. Not for individuals sensitive to caffeine or Beta-Alanine. California Prop 65 Warning applies.*

Why Buy at Get Yok'd

• Real-time inventory across all five Southern California stores
• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
• Authorized Optimum Nutrition retailer
• Full flavor selection available — staff can help you find the right flavor for your taste preferences
• One of the best loyalty programs in the supplement industry — earn rewards on every purchase

Who Should Exercise Caution with AMIN.O. ENERGY

• Not for persons under 18 years of age
• Not for pregnant or nursing women
• Not for individuals sensitive to caffeine — contains 100mg per 2-scoop serving from natural sources
• Not for individuals with cardiovascular conditions without physician clearance
• Contains CarnoSyn® Beta-Alanine — may cause temporary skin tingling (paresthesia) in sensitive individuals; this is harmless and normal
• Do not consume additional caffeine-containing products while using AMIN.O. ENERGY — excess caffeine can cause nervousness, irritability, and sleeplessness
• Avoid use after 5pm if caffeine affects sleep quality
• Consult a physician before use if taking any prescription medications
• California Prop 65 Warning applies.
• Keep out of reach of children.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.