Types of Preparations Containing Protein

Proteins are the fundamental component of all organs in the body. They are constituents of hormones, enzymes, and antibodies, which are involved in metabolic processes and ensure smooth functioning of the organism. Proteins are composed of amino acids (thus, their provision is crucial). One of the primary and exceptionally significant functions of proteins, particularly for strength training enthusiasts, is muscle construction and repair.

Proteins can be divided into two groups: slowly-absorbing proteins and quickly-absorbing proteins. Slowly-absorbing proteins are those that release amino acids gradually and slowly into the bloodstream, which results in delayed metabolism for a certain duration. Utilizing this category of protein seems to be the most reasonable choice because they provide prolonged satiety and a steady supply of nutrients to the muscles, especially overnight.

During the sleep phase, the secretion of cortisol, a hormone responsible for catabolism, increases. Proteins with fast absorption are characterized by very rapid absorption by the body. Utilizing this property, we should provide protein immediately after training to nourish our muscles. Proteins with fast absorption can also be taken before training and in the morning, right after waking up. Of course, this does not mean that the above proteins cannot be taken at other times. In my opinion, the recommended times of ingestion, depending on their functions, seem the most reasonable.

Micellar casein, a natural, non-denatured form of casein found in milk, is thought to be the only protein that acts anticatabolically and prevents the breakdown of muscle tissue. It is very slowly digested and constitutes a very rich source of protein that nourishes the muscle for a long time after soy proteins stop working, causing the best resistance to cholesterol and nitrogen elimination. It contains the best value for proteins in the blood, which makes it ideal for the metabolism of amino acids. Egg protein is a standard and readily available source of protein. Its isolate is a fat-free source of protein that has the highest possible protein efficiency, making it a reference protein. It contains a full amino acid profile, a high concentration of BCAA, and high biological values. Egg protein is considered the best source of protein with anabolic effects. Whey protein concentrate (WPC) is the most popular and well-known form of protein on the supplement market. It contains optimal proportions of amino acids and peptides. In addition to its anabolic effect, it also improves the body's immunity. It increases the level of glutathione in the body (a great antioxidant and detoxifier). Soy protein isolate is a full set of exogenous amino acids in proportions and quantities close to the demand of our body. It strengthens immunity, bones, and regulates hormonal economy. It also increases insulin activity and thyroid hormones, contributing to a more effective reduction of fat tissue. Soy protein isolate prevents the formation of atherosclerotic changes. Soy protein is the slowest-eliminated protein from the body, preventing the loss of precious nitrogen and benefiting the calcium economy in our body. Calcium caseinate is a protein that belongs to the group of slowly-digested proteins. Its consumption results in maintaining high levels of free amino acids necessary for muscle development for a long time. It inhibits catabolism, especially in the post-workout phase and the night phase. Calcium caseinate enhances strength gain, helps build and regenerate muscle tissue. Milk protein isolate is a protein that contains everything that is best in milk, without unnecessary lactose, cholesterol, and saturated fatty acids. It also has a strong bactericidal effect.

Whey protein isolate (WPI) is the cleanest form of serum protein available. It has no fat, so it is easier to build lean muscle mass. Serum-protein isolate, due to its purity and lack of lactose, is very well digested. It is characterized by high absorbability. It provides immediate absorption of amino acids and BCAAs into the bloodstream.

When choosing a protein source for oneself, it is worth considering what is of the highest priority for us. If we aim to avoid potential nutritional deficiencies, it is advisable to focus on protein sources with a slow absorption profile. Individuals with longer training history can benefit from protein sources with varying absorption profiles. However, it is crucial to be aware that protein supplements are not a substitute for a healthy diet, but merely a complement to it.