Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Guayusa (Ilex guayusa) is a caffeinated plant native to the Amazon Rainforest, particularly used by indigenous peoples of Ecuador. Traditionally, its leaves are brewed into a tea and consumed for their stimulating effects, attributed to caffeine, theobromine, and antioxidants. The use of guayusa has primarily centered around increasing alertness, energy, and ritualistic or social practices, rather than specifically targeting the glandular system (which includes endocrine glands such as the thyroid, adrenal, and pituitary glands). There is minimal documented traditional use specifically for supporting the glandular system. Scientific research on guayusa is limited and has focused mostly on its stimulant properties and antioxidant content, without direct studies linking it to glandular or endocrine support. Thus, while guayusa has a tradition of use as a general tonic and stimulant, there is little traditional or scientific evidence specifically supporting its use for the glandular system. The evidence rating is therefore low.

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