Effect On Bad Cholesterol Markers
Guaraná consumption has been shown to improve metabolic markers relating to LDL-cholesterol (bad cholesterol) oxidation and is inversely associated with type II diabetes. 
Effect On Strength
Epicatechin, an active component of Guaraná, has been shown to improve grip strength.
 Torres EAFS, Pinaffi‐Langley AC da C, Figueira M de S, et al. Effects of the consumption of guarana on human health: A narrative review. Comprehensive Reviews in Food Science and Food Safety. 2021;21(1):272-295. doi:https://doi.org/10.1111/1541-4337.12862