Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Guarana (Paullinia cupana) is a plant native to the Amazon basin and has traditionally been used for its stimulant and medicinal properties. Recent scientific research has explored guarana’s potential as an antioxidant, which relates to its proposed use in supporting the body against free radical damage. Guarana seeds are rich in bioactive compounds, notably caffeine, theobromine, catechins, and tannins, many of which possess antioxidant properties. In vitro studies have demonstrated that guarana extracts can neutralize free radicals and reduce oxidative stress in cell cultures. Some animal studies have further supported these findings, showing that guarana supplementation can increase antioxidant enzyme activity and decrease markers of oxidative damage. However, clinical research in humans remains limited and often uses small sample sizes or studies guarana in combination with other ingredients, making it difficult to isolate its specific effects. While the antioxidant potential of guarana is promising and rooted in its phytochemical content, more robust human trials are needed to confirm its efficacy in reducing free radical damage or improving related health outcomes. Overall, the scientific evidence supporting guarana’s use for free radical damage is preliminary but growing, justifying a moderate rating for its evidence base at this time.

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Products containing guarana

Nature's Sunshine MetaboMax Plus
Nature's Sunshine Ultra Therm