Everything You Need to Know About HMB!

HMB is an abbreviation for 3-hydroxy-3-methylbutyric acid. This substance is classified as an organic compound whose substrate is leucine, which I mentioned in my article. Hydroxymethylbutyrate is produced through catabolic processes known as proteolysis, which are responsible for the breakdown of proteins.

The incompletely understood mechanism of action of HMB frequently leads to controversies around this product. Many critical opinions are expressed without factual basis. In the following section, I will detail the role of hydroxymethylbutyrate in the human body, which could explain the general understanding that this product has anti-catabolic properties. Let's begin with the reminder of what kinase is - a group of compounds responsible for the transport of phosphate residues from ATP. One of them is mTOR kinase, which acts as an information center, analyzing the levels of amino acids and energy, as well as the action of anabolic hormones in the body. Here, branched-chain amino acids play a key role, as they make up the largest amount of these compounds in muscles. It is worth mentioning that muscles will not be able to grow without sufficient amounts of amino acids and energy, even if anabolic hormones are acting. HMB works by stimulating protein anabolism processes, which coincide with the activity of mTOR when the protein complex 4E is connected with RNA. In addition, HMB also has an impact on testosterone production by the body, being a precursor of steroidal compounds in muscle tissue. Finally, HMB is also associated with the process of ubiquitin methylation, a catabolic enzyme. Studies show that ubiquitin stops having a destructive effect on proteins after binding to a methyl group. It is also worth mentioning that short-chain fatty acids, to which HMB belongs, are produced by the gut flora during protein digestion.

The provision of hydroxymethylmalonic acid is also based on certain premises. It is assumed that the daily dose of this agent for men is 3 g and should be divided into three portions per day. Women, on the other hand, should consume 2 or 3 doses totaling 2 g. There is also a belief that HMB should be administered three times a day, albeit with different amounts for each time of the day: - in the morning after waking up → 0.1 g per 10 kg of body weight; - after strength exercises → 0.15 g per 10 kg of body weight; - before bedtime → 0.1 g per 10 kg of body weight. The application of HMB should be made both on training days and on days without physical activity. The agent is currently available in the form of capsules, liquid, powder, or tablets.

Krzysztof Durkalec-Michalski conducted a three-month study with 58 athletes from various sports (rowing, wrestling, judo, and Brazilian jiu-jitsu). The participants were aged between 22 and 28 years. The study showed that HMB supplementation compared to the control group resulted in a decrease in body fat and an increase in fat-free mass. Additionally, a positive improvement in aerobic and anaerobic performance was observed in the test group. In athletes using HMB, an increase in maximum muscle strength and a significant difference in lactate levels post-exercise and at rest were also detected. Authors of a review article from 2014, published in the journal "Farmacja Współczesna", presented numerous scientific reports on four possible metabolic pathways that can be linked with HMB supplementation. The mentioned research hypotheses concern the ubiquitin-proteasome system, cholesterol synthesis, the influence on the expression of IGF-1, and the mTOR kinase pathway. Comparing various scientific works confirms the current discrepancy regarding the use of HMB. The main reason is the lack of relationship between the training status of the test subjects, the duration of supplementation, and the numerous individual differences. In the summary, the authors point out that people struggling with excessive muscle breakdown or acquired immune deficiency may benefit more from HMB supplementation. There is also a series of studies confirming the effectiveness of HMB in sports supplementation. An example is a study conducted on a group of 35 football players. The analysis lasted 4 weeks, and the aim of the test was to determine the influence of HMB on the strength of athletes during activities such as bench press, squats, and throws. The control group consisted of 16 players, while the test group (taking HMB at a daily dose of 3 g) consisted of 19 participants. The results confirmed the lack of significant differences in both the strength results and the body composition of the athletes.

The aforementioned information in the text is more informative than persuasive in initiating HMB supplementation. The aim of this article is not to endorse hydroxymethyl masalan but to illustrate the mechanism of action and the assumptions that can validate its benefits. Whether you opt for purchasing this nutrient is entirely up to you. I always believe that if we do not test the product ourselves, it makes no sense to assume it does not work. As we all have distinct physiologies, it is worth noting that a longer duration is required to reliably test its efficacy.