I've been really big on cordyceps sinensis mushrooms. This species grows mainly throughout the tibetan plateau, although other species can be found throughout Asia and other tropical climates. It's essentially a parasitic fungus, infecting a few different species of ghost moths in the high altitudes, the spores will infect the species of ghost moths and eventually they germinate and the mycelium grows, taking over the moths and killing and eventually mummifying them. It's very interesting to watch he process - there's videos all over youtube. Cordyceps sinensis is also referred to as a more common name of 'catepillar fungus'.
These have been used in traditional chinese medicine for centuries. There's alot of purported benefits of cordyceps - mainly cholesterol reduction, immune system stimulation, increased recovery times of respiratory ailments, liver fortification, and being a relatively strong adaptogen, resulting in increased energy, strength and stamina. Probably the most well known benefit of cordyceps though is increased cellular oxygen absorption - resulting in increases in stamina and cardio based exercise - that to me, was apparent from the first dose. I could workout significantly longer, keep a more constant pace and not become as winded as i normally would. I would take them before work alot of time years back, and I literally felt as if i had an extra gear throughout the day, able to have a significantly higher output as far as physical/mental exertion goes.
Here's some good publications on cordyceps sinensis:
** My dosage was ground up bulk cordyceps, 2g a day split into two 1 gram dosages - one in the morning and one in the afternoon.
http://www.ncbi.nlm.nih....pmc/articles/PMC3121254/