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superior 8:1:1 bcaa ratio • super mega dose of leucine • anticatabolic protection • recovery and endurance • lean muscles and strength • excellent price-quality ratio


none (tablets)


204 g / 120 tablets • 30 servings



serving size: 4 tablets

servings per container: 30

per 1 tablet

per 4 tablets

Micronized BCAA 8:1:1




1000 mg
125 mg
125 mg


4000 mg
500 mg
500 mg


L-leucine, L-isoleucine, L-valine, bulking agent: microcrystalline cellulose, bulking agent: sodium carboxymethyl starch, anticaking agent: magnesium stearate, anticaking agent: silicon dioxide.

recommended use:

Take 4 tablets before or after workout.


Most of us involved in sport or physical activity know that BCAAs are among the most desired and universal supplements, providing anti-catabolic protection and anabolic benefits, and improving recovery, endurance and strength. They play a number of important roles in such areas as protein synthesis, immunity improvement, nitrogen balance, fat oxidation, prevention of brain fatigue, or creation of glucose, to mention but a few. However, this key muscle building block cannot be produced in your body. It must be delivered from the outside. Thus, BCAAs are considered as essential amino acids.

Opinions concerning the ratio of leucine to isoleucine and valine vary, each having its own supporters and opponents. Usually, the argument is split between the 2:1:1 and 8:1:1 ratios. Since MUST already launched the 2:1:1 version, we have now decided to cater for the supporters of the 8:1:1 ratio by introducing MUST BCAA8 SPORT.

We decided on the form of tablets to satisfy enthusiasts of a faster and more convenient means of supplementation. In addition, tablets are more acceptable for athletes on diet cycles, as some of them do not trust powders, especially those flavored. Even though a sweetener such as sucralose is calorie free, with a zero GI, almost all manufacturers use other fillers, such as dextrose and maltodextrine, which raise blood insulin levels. We would like to raise your awareness of the fact that many brands use dishonest marketing techniques highlighting the pluses, but hiding the minuses and promoting a new trend of sugar-free sweeteners. On the one hand, it is true that in this case you avoid calories and sugar, but on the other hand, consuming many products of this type could trigger your craving for sweet products or snacks that your body does not need. You might then end up actually adding calories and gaining weight, not necessarily having something to do with lean mass. Let us also make it clear that some opinions published on the Internet, e.g. suggesting that the breakdown of sucralose compounds is considered to be carcinogenic, are completely made up, having no scientific support whatsoever.

In spite of the argument concerning the 2:1:1 ratio presented above, using BCAA 8:1:1 makes sense for most active people. If you are a professional athlete who has a protein meal every few hours that each time provides about 5 g of BCAA, consuming chicken breast, turkey, beef, fish, eggs and plant proteins, you will be fine with the basic 2:1:1 ratio. However, in most other cases, you are probably not one of those 5-to-6-meal-per day protein counters, but fall within the group of over 90% of people who have a lower protein intake. This is why, in most cases, taking MUST BCAA8 SPORT does make sense.

Leucine is a key amino acid that stimulates muscle protein synthesis by the initiation of mRNA translation, depending on the mammalian Target of Rapamycin (mTOR). It also stops the effect of cortisol, the stress hormone that increases muscle breakdown processes. There are many studies showing leucine’s stimulating role for the mTOR in adipocytes and some other cell types, including hypertrophic growth, leptin secretion, protein synthesis and adipose tissue morphogenesis. Cell growth is regulated by the mTOR, which functions as a serine/threonine protein kinase and which integrates the input of insulin, growth factors (such as IGF-1 and IGF-2) and amino acids. Leucine appears to be a nutrient signal that regulates protein synthesis by mechanisms that are independent of insulin. The mTOR pathway influences the functions of muscles, liver, white and brown adipose tissue, and brain, while a dysregulation of this pathway could lead to certain diseases, such as diabetes, obesity, depression, and some types of cancer.

Using MUST BCAA8 SPORT, you are getting the strongest dosage of BCAA 8:1:1 available on the market in the form of tablets, providing 5 g of amino acids, including 4 g of leucine per serving, so no matter what sport or activity, physical or mental, you are engaged in, you can be sure that MUST got you covered to reach your goal. MUST BCAA8 SPORT is a supplement you simply MUST have.

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