Final answer:
Asian Americans tend to drink very little or abstain from alcohol due to a biological reaction.
Step-by-step explanation:
The population group that tends to drink very little or abstain from alcohol due to a biological reaction to alcohol is Asian Americans.
Some Asian Americans have a genetic variation that affects how their bodies metabolize alcohol. They have a deficiency in an enzyme called ALDH2, which is responsible for breaking down alcohol in the body. As a result, when these individuals consume alcohol, they experience a buildup of acetaldehyde, a toxic byproduct of alcohol metabolism. This can cause symptoms such as facial flushing, rapid heartbeat, nausea, and dizziness, known as the 'Asian flush'.
Because of these unpleasant reactions to alcohol, many Asian Americans choose to abstain from drinking or consume very little alcohol.