What is the recommended daily intake of L-carnitine and how much L-carnitine is considered excessive or too much for the body?

The recommended daily intake of L-carnitine is typically around 500-2000 mg per day. Excessive or too much L-carnitine for the body is considered to be over 3000 mg per day, which can lead to side effects such as nausea, vomiting, diarrhea, and a fishy body odor.