A well-balanced, NSF Certified for Sport EAA formula with 1.25 g leucine per scoop, but only about 4 g of amino acids for roughly $1.73 a serving.
Mixed
Nutrition Reviews score
Weighted across efficacy, quality, value, experience & transparency. See breakdown
We may earn a commission when you buy through these links — it never affects our scores. How we make money
Last reviewed September 29, 2026 by the Nutrition Reviews Editorial Team · How we review
Our verdict
Amino Complex gets the science and the certification right: a balanced, leucine-forward essential amino acid profile with NSF Certified for Sport status. It is let down by a small dose, a high price and divisive taste. It makes most sense for tested athletes or people who can't use protein powder; everyone else will get more from a quality protein shake.
Best for
Skip it if
Our five-factor score out of 10. Factors are weighted by how much they matter to the outcome you’re paying for. Methodology
out of 10
Key ingredients at clinically studied doses, and how strong the evidence is.
Third-party testing and certifications, manufacturing standards, contaminant testing, recall history.
Cost per effective serving compared with category peers.
Taste, mixability, texture and tolerability from aggregated buyer and creator feedback.
Full label disclosure (no proprietary blends), available COAs, honest marketing.
Thorne Amino Complex is one of the few amino acid powders with a genuinely balanced essential amino acid profile. Each scoop lists all nine essential amino acids, led by 1.25 g of leucine and 625 mg each of isoleucine and valine, plus 650 mg of lysine, 350 mg of threonine and smaller amounts of histidine, phenylalanine, methionine and tryptophan, along with cystine and tyrosine. It is flavored with natural fruit and vegetable juice color and sweetened with stevia (rebaudioside A), and it is listed in NSF's Certified for Sport database.
That profile is the right idea. Muscle protein synthesis depends on all of the essential amino acids, and the ISSN's protein position stand recommends 700–3,000 mg of leucine per protein dose alongside a balanced array of essential amino acids. At 1.25 g, a scoop of Amino Complex clears the leucine floor.
The drawback is dose for the money. The amounts add up to about 4 g of amino acids per scoop, roughly 3.8 g of them essential, which is a modest amount; Thorne suggests one or two scoops daily. At $52 for 30 scoops, each serving costs about $1.73, and most buyers could get more essential amino acids from a standard scoop of protein powder for less.
Buyer feedback is lukewarm. The Berry listing averages 4.2 stars across roughly 2,100 buyer ratings; reviewers praise the quality and recovery support, but taste is split, the stevia draws complaints, some report nausea, and many question the value. Thorne's product page also carries a California Prop 65 warning for lead and advises against use during pregnancy or nursing.
| Key ingredient | Per serving | Why it matters |
|---|---|---|
| L-Leucine Within the ISSN's 700–3,000 mg leucine range per protein dose. | 1.25 g | Within the ISSN's 700–3,000 mg leucine range per protein dose. |
| Other essential amino acids (isoleucine, valine, lysine, threonine, histidine, phenylalanine, methionine, tryptophan) All nine essentials are present in a more balanced ratio than most amino drinks. | 2,570 mg combined | All nine essentials are present in a more balanced ratio than most amino drinks. |
| L-Cystine and L-Tyrosine Non-essential amino acids that round out the blend. | 150 mg / 30 mg | Non-essential amino acids that round out the blend. |
Supplement Facts
Serving Size 1 Scoop(s)
Servings Per Container 30
Other ingredients: Citric Acid, Fruit and Vegetable Juice (Color), Flavor, Rebaudioside A
Flavors & variants
Testing & quality
Many products are NSF Certified for Sport (listed in NSF's database); others carry NSF Contents Certified status. Thorne states it tests ingredients and finished products for identity, purity, potency and contaminants.
Goals it supports
Independent creators reviewing Amino Complex on TikTok and YouTube.
What we like
Watch-outs
Similar products, ranked by our score.
Nutricost
A budget EAA powder at about $0.67 a serving that includes all nine essential amino acids, but 6 of its 8 g are BCAAs and several others are only token amounts.
Optimum Nutrition
A hugely popular caffeinated amino drink: 100 mg natural caffeine plus a 5 g proprietary amino blend led by taurine, glutamine and arginine, so EAA doses are unknown.
Xtend
A best-selling BCAA drink: 7 g BCAAs, glutamine and electrolytes with zero sugar, but BCAAs add little if you already eat enough protein.
Transparent Labs
Clean-label BCAA drink with 8 g fermented BCAAs, 5 g glutamine and no artificial sweeteners, but about $1.33 a serving and 1,500 mg of vitamin C per scoop.
Ashwagandha has real trials for stress and sleep, rare but serious liver risks and growing regulatory scrutiny. What extract names mean and which doses were studied.
Nutrition Reviews Editorial Team · Sep 28, 2026
Collagen has dozens of trials behind it, but much of the research is industry-funded. What holds up for skin, joints and hair, plus the doses studies used.
Nutrition Reviews Editorial Team · Sep 28, 2026
How much creatine to take for your weight, whether to load, and what research says about water weight, hair loss, kidneys, the brain and pricier forms.
Nutrition Reviews Editorial Team · Sep 28, 2026