CS liquid (each dosage is a bottle of liquid containing 30 ml: comprising 75% of CS, 6% Lingzhi, 6% shitake, 5% bamboo shoot, 2% honey, 0.1% potassium sorbet and 5.9% pure water) and Lingzhi capsule (each capsule contains 620mg of: 52.42% Lingzhi, 28.23% CS, and 19.35% soy gel ) ; one quarter bottle of CS to be ingested twice a day, and the Lingzhi capsule to be taken once a day, both for a period of 28 days.

Liquid tea ingested twice a day and flour-filled capsules ingested once a day over a period of 28 days

Before and after 28-day ingestion of CS and Lingzhi extracts, subjects will undergo a graded exercise test on a treadmill and results will be compared.

Before and after 28-day ingestion of CS and Lingzhi the subjects undergo computerized cognitive tests and results will be compared.