It is possible to take healthy steps to speed your metabolism.
Everyone has a baseline metabolic rate, defined as the lowest amount of energy exerted to keep the body at rest.
Several factors contribute to this rate, with muscle mass playing a large role. Other factors include hormone output, anxiety, caffeine, nicotine, and overall body size.
The larger the surface area, the more heat that is lost and the higher the metabolism.
Artificial stimulants, although they work in small quantities, will also take a huge toll on your physical health.
For a long-term, effective, and healthy way of increasing metabolism, lift weights and stop dieting: cutting calories to an unhealthy level slows metabolism as your body protects itself from starvation.
One good trick is to eat several small meals a day, and avoid large meals.
That means eating breakfast. It helps.