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.
I recommend you tip on arrival and departure with the bulk of the tip being deployed on arrival in order to influence the quality of care your vehicle is about to receive. Tipping only at the end does nothing to influence care. I wrote a lot about this in: What to do when valet parking. Additional useful article: How much to tip valets. If too many guests stiff the valets, it can be embarrassing to the event host.