What is Dihydromyricetin?
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Dihydromyricetin (DHM) is a flavonoid extracted from the oriental raisin tree (Hovenia dulcis) and has a history of therapeutic use in China.
DHM”™s main benefit is the prevention and reduction of hangovers. This is achieved by the enhancement of alcohol dehydrogenase (ADH) and acetaldehyde dehydrogenase (ALDH), which are the main enzymes responsible for breaking down alcohol and acetaldehyde within the body. 
Acetaldehyde in particular is a highly toxic chemical and one of the main causes of hangovers. When these enzymes are enhanced, alcohol and acetaldehyde can be broken down faster than normal.*
DHM has many cellular health properties that lend themselves to promoting cognitive health. [2,3] This occurs because DHM promotes heme-oxygenase-1 (HO-1), an enzyme that catalyzes the degradation of heme and confers cellular health properties. Dihydromyricetin can also promote liver health.* 
The recommended dosage is 300mg after drinking, right before bed to avoid a hangover.