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.
Typically, food poisoning symptoms will occur several hours after eating contaminated food, but in some instances they can develop up to a week later or more. While most cases of food poisoning resolve in two to four days, some instances can last for weeks or even months.