RSP AminoLean Review — What’s in the Proprietary Blend?

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RSP Nutrition is a supplement company based in Miami Beach that aims their products at the bodybuilding crowd. They manufacture a variety of supplements that includes several different kinds of fat burners and a few different amino acid formulas, too. We decided to try out the inexpensive AminoLean Energy Formula, which RSP calls “a great tasting, easy-to-mix, energy drink that you can take any time to help build muscle and burn fat.”

Shop RSP BCAAs here.

RSP AminoLean Nutrition and Ingredients

There’s no calorie information on the label, but each serving is 7.8 grams and comes with 5 grams of amino acids. Note that it doesn’t contain 5 grams of branch chain amino acids, it has 5 grams of fourteen different amino acids. The standard BCAAs (leucine, isoleucine, and valine) are there, but so are taurine, glutaminearginine, beta alanine, citrulline, tyrosine, and a few others.

We don’t know the weights of any of these individual ingredients; it’s a proprietary blend.

[See our BCAA roundup HERE]

RSP Nutrition AminoLean Ingredients

There’s 1.5 grams of a “weight management blend” that includes conjugated linolenic acid (CLA) powder, l-carnitine l-tartrate, green tea extract, and green coffee extract. Finally, there’s a “natural energy and focus blend” of caffeine and theobromine (a caffeine-like stimulant found in chocolate and some other plants). This provides an equivalent of 125 milligrams of caffeine per serving, about as much as in 1.5 cups of coffee.

The other ingredients are mostly flavorings: citric acid, malic acid, natural & artificial flavors, sucralose, and acesulfame potassium. There’s also a blend of cellulose, xanthan, and carrageenan gums (thickeners and stabilizers), a couple of anti-caking agents, and red dye number 40. (Note that we picked up the Fruit Punch flavor.)

RSP Amino Lean Benefits and Effectiveness

My biggest issue with Amino Lean is that I don’t know how much of the ingredients I’m consuming.

Studies have shown that a 2:1:1 or 3:1:1 ratio of leucine, isoleucine, and valine is probably the best for building muscle. I don’t know if that’s in here. Most people suggest that if you’re supplementing with taurine, which may help with endurance and focus, you take about a gram. I don’t know if that’s in here. Citrulline may improve circulation and it probably works best with doses of 3 or more grams. I don’t know if that’s here.

RSP Nutrition AminoLean Nutrition

That’s not to say that there’s no benefit to having these ingredients, but it’s just hard to know what they are when the blend is proprietary.

The “weight management blend” also left me with some questions. The first ingredient in the 1.5-gram blend is CLA, a type of fat that some studies have shown can help reduce body fat, but results have been very mixed. CLA is also usually used in doses of at over 3 grams.

The l-carnitine l-tartrate may reduce muscle soreness and enhance the effects of growth hormone, which may reduce body fat. It’s usually administered in doses of one to four grams, so again, the dose is probably too low to have a great effect.

The green tea extract in the “weight management blend” contains 50 percent EGCG, which is meant to speed the metabolism and help with weight loss. But results are mixed, usually work best with people who consume very little caffeine, and it’s typically dosed at at least 500mg of EGCG, which the weight loss blend probably doesn’t contain.

RSP Nutrition AminoLean Price

RSP AminoLean Price

Thirty servings will cost you $20, which comes to 67 cents per serving or 13.4 cents per gram of amino acids. That’s about as cheap as you’re likely to find an amino acid blend. But some BCAAs, like Scivation Xtend or MusclePharm 3:1:2 are closer to 11 cents per gram and have more transparency with regard to labeling.

RSP AminoLean Taste

It tastes like a mixture of maraschino cherry and strawberry candy, but it’s somewhat heavy on the cherry, making it a little reminiscent of cough syrup. Then again, it’s not too sweet or sour like a lot of amino acid blends are, which might be a plus.

The Takeaway

It’s cheap, it contains all the amino acids you might want, and it’s got a nice dose of caffeine. It is a little hard to get all details about dosage, and many of its extra ingredients may not be present in very high doses.

RSP AminoLean

Per Serving: $0.67









Other Ingredients



  • Many ingredients are linked to enhanced performance
  • Contains caffeine
  • No soy


  • Proprietary blend means you don't know the dosage
  • Many ingredients with unspecified amounts
  • Contains sucralose and acesulfame potassium


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Nick is a content producer and journalist with over seven years’ experience reporting on four continents. His first articles about health were on a cholera outbreak in rural Kenya while he was reporting for a French humanitarian organization. His next writing job was covering the nightlife scene in Shanghai. He’s written on a lot of things.After Shanghai, he went on to produce a radio documentary about bodybuilding in Australia before finishing his Master’s degrees in Journalism and International Relations and heading to New York City. Here, he’s been writing on health full time for more than five years for outlets like BarBend, Men's Health, VICE, and Popular Science.No fan of writing in the third person, Nick’s passion for health stems from an interest in self improvement: How do we reach our potential?Questions like these took him through a lot of different areas of health and fitness like gymnastics, vegetarianism, kettlebell training, fasting, CrossFit, Paleo, and so on, until he realized (or decided) that strength training fit best with the ideas of continuous, measurable self improvement.At BarBend his writing focuses a little more on nutrition and long-form content with a heaping dose of strength training. His underlying belief is in the middle path: you don’t have to count every calorie and complete every workout in order to benefit from a healthy lifestyle and a stronger body. Plus, big traps are cool.