Leptin is a hormone that helps manage appetite levels. If you are feeling lethargic or if you want to lose a little bit of weight, you may require more leptin in your system. Leptin works by informing your brain about how much you have in your fat reserves.
For most cases of food poisoning, symptoms tend to come on within one to three days of eating the contaminated food. However, for some types of food poisoning, this 'incubation period' can be as long as 90 days.
Most cases of food poisoning are mild and clear up in two to three days from the initial onset of symptoms. The nausea and diarrhea that result from food poisoning can leave you feeling weak for a few days after these symptoms subside.