Definition. 1  Lactose intolerance refers to the inability of the body to digest lactose. 2  Lactose is the form of sugar present in milk. The enzyme lactase, which is normally produced by cells lining the small intestine, breaks down lactose into substances that can be absorbed into the bloodstream.
1 Tipping upon drop-off of your car is totally optional and is not done by the majority of drivers. Tip your valet when your car is returned to you from the parking lot.  A tip of $1 to $5 is the typical range, with $2-3 being most common.
Emily Post, the maven of good manners, suggests tipping $2 US dollars (USD) when a valet returns a car. When valet parking is free, a tip is definitely expected. You should probably at least factor in a $2 USD tip, although some people tip $5 USD or more. Many still argue that the valet should also be tipped when he takes the car.