Acronym BCAA - Role in Sports, Dosage, Reviews, Optimal Consumption Time
Max Müller
2026-03-18
4 min. read
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BCAA, or branched-chain amino acids, is currently one of the most commonly used supplements by athletes, although due to its effectiveness, it can also be utilized by those who engage in recreational sports or temporarily halt their workouts. BCAA is an acronym for branched-chain amino acids.
Excess branched-chain amino acids are processed into glucose
Just because a small amount of branched-chain amino acids is beneficial, it doesn't automatically mean that a significantly larger amount delivers significantly better results. In fact, this excess is not necessarily going to be converted into sugar. Instead, excessive doses of branched-chain amino acids result in the activation of the enzyme dehydrogenase, leading to the creation of alpha-keto acids used as building blocks for the synthesis of the amino acids glutamine and alanine. In short, excess branched-chain amino acids are partially utilized in muscles as a direct source of energy and partially result in the production of glucosylamine and glutamine, which are sent to the liver. However, increasing doses of branched-chain amino acids should always offer slightly more, as the anabolism of protein operates on the principle of diminishing scale effects – meaning that as the dose increases, the effects increase, but this increase is proportionally smaller. Eventually, the time comes when a higher dose delivers effects, but they are practically unnoticeable.
Providing energy through BCAA during training
The greater the intensity of the exercises, the higher the energy demand. To cope with such harsh conditions and increased energy requirement, our body reaches for the reserves of accumulated carbohydrates, fats, and amino acids, including branched amino acids. This observation has led to the opinion that since branched amino acids are used as an energy source, their consumption during training will supply us with additional energy. As seen on the above graph, the more intense and longer the training, the more amino acids are oxidized. However, the overall energy expenditure rises even faster and is satisfied by the supply of fatty acids and carbohydrates. Therefore, if we want to provide our body with energy during training, it is better to drink a carbohydrate-based supplement such as gainer or carbo. However, this does not mean that we should not consume BCAA during training. They will still help, but in a different way. They will initiate anabolic processes during training and prevent muscle catabolism. If the training is long and performed in a warm climate, BCAA can also help combat central fatigue and indirectly contribute to improved performance.
BCAA should contain as much leucine as possible
On the BCAA label we often find labels such as 2:1:1 or 4:1:1. They refer to the proportions of leucine, isoleucine and valine in a given product. Definitely the most commonly found are the 2:1:1 ratio, although lately the popularity of varieties where the first digit representing the value of the lecithin is 4 or even 10. This is due to the fact that leucene is the only one of these three amino acids that has the ability to initiate muscle protein.
With adequate intake of high-quality protein, there is no need for BCAA supplementation
Branched amino acids are not a novelty of our times developed in a laboratory, they are naturally present in every protein product. Therefore, protein intake is so important for muscle building – it provides branched amino acids. The question is, if someone provides enough high-quality protein in their diet, will BCAA provide any additional benefits? Many people say there is no solid scientific evidence for this, but this is not true. There are studies that apply dietary control, participants consume around 1.5-2 grams of protein per kilogram of body weight, and BCAA supplementation allows for the reduction of muscle pain and the decrease of muscle damage markers such as lactate dehydrogenase (LDH) and creatine kinase (CK).
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