Perfect Amino alternatives: eight essential amino acid supplements compared

Facts checked on October 31, 2026. Prices and formulas change; check each brand's own site before you buy.

Perfect Amino by BodyHealth is the best-known essential amino acid (EAA) supplement, and plenty of people take it happily. The two reasons people look for an alternative come up again and again in reviews and forum threads: a serving is five tablets, and the unflavored powder is hard to enjoy. Others want a lower price per serving, a particular sweetener, or a product built around a different goal.

Below are eight alternatives, what each one is, and who it suits. We make the first one, Rejuvenate Muscle Health, so we have put our reasons first and kept every other entry to facts from the brand's own pages.

Quick picks

• Easiest daily routine: Rejuvenate Muscle Health, one flavored 5-calorie stick, twice a day.
• Disclosed amounts per amino acid: Kion Aminos or Thorne Amino Complex.
• NSF Certified for Sport: Thorne Amino Complex, Momentous Vital Aminos or OptimalAmino.
• Tablets like Perfect Amino, with amounts listed: OptimalAmino.
• A formula aimed at adults over 40, at a premium: The Amino Company Life.
• Lowest price per serving: Naked EAAs.
• With caffeine, for workouts: Optimum Nutrition Essential AMIN.O. Energy.

See the 12-Week Supply$1.07 a serving on the first order, with a 90-day money-back guarantee on the 12-Week Supply.

1. Rejuvenate Muscle Health: one stick instead of five tablets

Rejuvenate is a single-serve drink-mix stick: one stick in 10 to 12 oz of water, two a day, hours apart. Each stick is 5 calories and carries a 3.87 g blend of free-form amino acids (eight essential amino acids plus arginine) and 1,000 IU of vitamin D3. It comes in four flavors: Raspberry Burst, Citrus Blast, Harvest Grape and Tropical Mango Pineapple.

It activates muscle comparable to 20g of protein per serving†‡ and contains no protein. It is written for adults who want something easy to keep taking, including people whose appetite is low.

Choose it if the tablet count or the taste is why you are leaving Perfect Amino. Skip it if you want tryptophan in the blend or avoid sucralose. Full comparison with Perfect Amino.

2. OptimalAmino: tablets with the amounts listed

OptimalAmino is the closest like-for-like swap for Perfect Amino tablets. A serving is 10 one-gram tablets with nothing else in them, and the label lists every amount: eight essential amino acids led by 1,964 mg of leucine, with tryptophan and without histidine. Every batch is NSF Certified for Sport. A 300-tablet bottle (30 servings) is $38, about $1.27 a serving, and the brand suggests one to four servings a day. Its own comparison page sets that against $98.95 for Perfect Amino's NSF Certified for Sport 300-count bottle.

Choose it if you like tablets and want disclosed amounts and certification at a lower price.

3. Kion Aminos: amounts on the label

Kion Aminos is a powder (and a capsule version, seven capsules a serving) with nine essential amino acids and the amount of each listed on the product page: 5,000 mg in total, with leucine the largest at 2,000 mg. It is sweetened with stevia and monk fruit and comes in four flavors. A tub is $49.95, or about $45 on subscription.

Choose it if you want to see exactly how much of each amino acid you are taking.

4. The Amino Company Life: built for adults over 40

The Amino Company describes Life as an essential amino acid blend for "healthy, active aging", designed around the muscle decline that begins around age 40, and the company says its formulas rest on decades of clinical amino acid research. It is a powder, one 6 g scoop a day mixed into 8 oz of water, with up to three scoops for what the brand calls stronger results. A 30-serving jar is $95, about $3.17 a serving, or $80.75 on a 15% subscription, and it comes with a 60-day money-back guarantee. The product page does not list the amino acid amounts or the sweetener.

Choose it if you want a formula aimed squarely at active aging and price is not the deciding factor.

5. Thorne Amino Complex: NSF Certified for Sport

Thorne's Amino Complex is a one-scoop powder in Lemon or Berry, with the nine essential amino acids and listed amounts, plus cystine and tyrosine. It is NSF Certified for Sport, which matters if you compete in a tested sport. It is $52 for 30 servings, or $46.80 on subscription.

Choose it if certification and disclosed amounts matter more than price.

6. Momentous Vital Aminos: more amino acids per scoop

Vital Aminos is an 11.5 g scoop, 40 calories, with what Momentous describes as "all 9 essential aminos + 4 more", including arginine. It is NSF Certified for Sport and comes in one flavor, Tropical Punch. It is $49.99 for 30 servings, or $37.49 on subscription.

Choose it if you train hard and want a bigger scoop with certification.

7. Naked EAAs: the lowest price per serving

Naked's unflavored EAA powder lists nine essential amino acids and sunflower lecithin, with no sweetener. At $39.99 for 50 servings it is about $0.80 a serving, or $0.64 on autoship. Flavored versions are also sold.

Choose it if price per serving is the deciding factor and you are happy mixing an unflavored powder.

8. Optimum Nutrition Essential AMIN.O. Energy: with caffeine

AMIN.O. Energy is a 5-calorie powder with 100 mg of caffeine and a 5 g amino blend that mixes essential and non-essential amino acids. It is sweetened with sucralose and comes in many flavors, at about $0.92 a serving. It is a workout energy drink more than a daily EAA supplement.

Choose it if you want caffeine and amino acids together before training.

How to choose an alternative

1. Start with the format you will actually take every day. A supplement you stop taking does nothing. Tablets, scoops and single sticks suit different routines.
2. Check the daily cost, not only the per-serving price. Some brands suggest one serving a day and some suggest two to four.
3. Decide whether disclosed amounts or certification matter to you. Kion and Thorne list amounts; Thorne and Momentous are NSF Certified for Sport.
4. Check the sweetener. Options range from none to stevia, monk fruit and sucralose.
5. Keep eating protein. An EAA supplement sits alongside your meals; it does not replace them.

See the 12-Week Supply$1.07 a serving on the first order, with a 90-day money-back guarantee on the 12-Week Supply.

Questions people ask

What is a good alternative to Perfect Amino?

It depends on why you are switching. For one flavored drink instead of five tablets, Rejuvenate Muscle Health. For tablets with the amounts listed, OptimalAmino. For listed amounts in a powder, Kion Aminos or Thorne Amino Complex. For NSF Certified for Sport, Thorne or Momentous Vital Aminos. For the lowest price per serving, Naked EAAs.

Is there an essential amino acid supplement without so many tablets?

Yes. Powders such as Kion, Thorne, Momentous and Naked are taken by the scoop, and Rejuvenate Muscle Health is a single-serve stick mixed into water.

Is there a better-tasting alternative to Perfect Amino powder?

Taste is personal. Flavored options include Rejuvenate Muscle Health (four flavors in single sticks), Kion Aminos (four flavors) and Thorne Amino Complex (Lemon and Berry). Perfect Amino itself sells seven powder flavors.

Which EAA supplement is cheapest per serving?

Of those compared here, Naked EAAs at about $0.80 a serving, or $0.64 on autoship, checked October 31, 2026. Optimum Nutrition AMIN.O. Energy is about $0.92 but includes caffeine.

Do any of these replace protein from food?

No. Essential amino acid supplements are taken alongside a normal diet. Rejuvenate Muscle Health contains no protein and is not a meal or protein replacement.

Which alternatives are NSF Certified for Sport?

Thorne Amino Complex, Momentous Vital Aminos and OptimalAmino, according to their product pages. Perfect Amino also sells NSF Certified for Sport versions.

Sources: BodyHealth, Perfect Amino tablets; BodyHealth, Perfect Amino user guide; Kion Aminos; Thorne Amino Complex; Momentous Vital Aminos; Naked EAAs; Optimum Nutrition Essential AMIN.O. Energy label (NIH DSLD); OptimalAmino tablets; OptimalAmino, comparison with PerfectAmino; The Amino Company, Life; Bukhari et al. (2015), Am J Physiol Endocrinol Metab 308(12):E1056-E1065. Competitor claims are quoted as each brand states them. Rejuvenate Muscle Health is not affiliated with the other brands named here; their names are trademarks of their owners.

† 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.
‡ Bukhari et al. (2015). Am J Physiol Endocrinol Metab, 308(12), E1056–E1065.