Branched Chain Amino Acids (BCAAs)
Theoretically, taking BCAAs (6-10 g/hour, along with sports drinks) during prolonged exercise can improve the psychological perception of fatigue. The theoretical substantiation of this effect is not in doubt, but in the course of the studies ambiguous results were obtained. In some experiments, improvements were noted, and in others there was no effect. Thus, at this point, more research is desirable. Beta-hydroxy-beta-methylbutyrate (β-HMB
Gained popularity relatively recently. It is used by athletes to accelerate muscle growth and recovery. Fat-burning properties have also been found.
Glycerin has the ability to retain water in the body, thereby contributing to better rehydration. It is used mainly by athletes involved in athletics in the form of solutions during training.

Ribose is a carbohydrate involved in the synthesis of adenosine triphosphate (ATP) in muscle cells. Clinical studies have shown that taking ribose to heart patients allows them to perform more exercise. Therefore, it was assumed that ribose could serve as an ergogenic agent for athletes. But most studies conducted in healthy people (trained and untrained) have shown that ribose does not have a positive effect on athletic performance. One experiment in 2006 compared the effects of ribose and dextrose on athletic performance in rowers. After 8 weeks of the experiment, it was noted that dextrose had a greater effect. Kreider et al. and Kersick et al. studied the effect of ribose on endurance athletes in anaerobic exercise. They were able to establish that taking ribose had no effect on athletic performance. Thus, research results generally show that ribose does not improve athletic performance in both aerobic and anaerobic exercise.

Inosine is the building material of DNA and RNA. Theoretically, inosine can positively influence athletic performance. However, available research evidence refutes this theoretical assumption.