Its surprisingly effective at reducing fatigue, calming your nerves, and lowering stress levels.17 Rhodiola also appears to work well in combination with tyrosine to improve your focus during stressful times.18 Theres some research on its role in learning and memory thats generally favorable, but most of these studies focus on animals, not humans.19 And a meta-analysis of human studies points out a lack of independent replications of the single different studies, warranting more research before anything too definitive can be stated.101 Pyrroloquinoline quinone (PQQ) PQQ, a coenzyme that occurs naturally in several foods, has been shown to improve exercise performance and mitochondrial biogenesis at a 20mg daily dose, while a dose of 21.5mg/day improved the cognitive function of healthy volunteers after just 12 weeks.106 107 Another study employing a 20mg dose saw improvements in both cerebral blood flow and oxygen metabolism in the brain.108 Lions mane Lions mane is an adaptogenic mushroom with potential for both cognitive enhancement and neuroprotection, but it requires a fairly high dose to reach that potential (typically up to 2g of dried mushroom material).109 Most supplements provide an extract to concentrate its bioactive compounds and take up less space in a capsule, but these extracts vary in strength, making dosing difficult to verify
Cyanocobalamin is also the most common form of vitamin B12 found in supplements
The glutathione absorbs directly through the alveolar membrane into the pulmonary capillaries and from there, rapidly into systemic circulation
The underlying repair processes, including new blood vessel formation that studies have examined in animal models, are the plausible mechanism, though the human timeline is not precisely established
