Supplements such as guayusa and lion’s mane have gained popularity for their potential health benefits. However, their effectiveness in humans has remained inconclusive. A recent study published in the journal Nutrients suggests that these supplements may have positive effects on mood and cognition in humans.
The study involved 40 participants who were randomly assigned to receive a placebo, guayusa extract, or lion’s mane extract. Assessments were conducted to evaluate participants’ mood, focus, mental clarity, concentration, productivity, ability to tolerate stress, and happiness. Neuropsychological assessments were also performed to measure reaction time, mental processing, cognitive control, and attention.
The results showed that both guayusa and lion’s mane improved reaction time, with lion’s mane having a more significant effect after 120 minutes. Guayusa significantly improved mental clarity, focus, concentration, mood, and productivity. Lion’s mane improved subjective ratings of happiness. However, it is important to approach these results with caution due to the study’s limitations, such as its small sample size and potential bias.
Another study suggested that lion’s mane, when administered over an 8-week period, reduced depression, anxiety, and sleep disorders in individuals with overweight or obesity. However, more research is needed to determine the exact mechanisms of action and long-term effects of these supplements.
While guayusa and lion’s mane are generally considered safe, it is important to consult with a healthcare professional before starting any new supplement regimen. The lack of rigorous testing and limited safety information on supplements should be taken into account. The study’s findings should be interpreted cautiously, and individuals should consider their own health conditions and possible interactions with other substances before incorporating these supplements into their routine.