Guarana

Because of its stimulating properties, guarana is often utilized as an ingredient in energy beverages and supplements. It includes a variety of compounds, including caffeine, saponins, and tannins, which are considered to improve energy and cognitive function. While human studies have yielded conflicting findings, additional research has suggested that taking guarana extract alone or in combination with other nutrients in dosages ranging from 37.5-300 mg may help improve attention, alertness, and memory ability.

A short research of 10 pentathlon players indicated that 300 mg of guarana supplementation may help reduce perceived effort and improve athletic and cognitive performance. Although guarana is usually regarded as harmless, using it in excessive dosages might cause negative effects such as elevated heart rate and anxiety.