The active ingredient in raspberry drops is raspberry ketone, which accelerates the body's metabolic rate and burns stored fat faster, states EverydayHealth.com. A boost in metabolism triggered by the release of the hormone norepinephrine results in increased weight loss.
Raspberry drops come in the form of capsules of varying dose and are part of a structured weight-loss program. The advised daily dose is 200 grams. Raspberry drops are not slimming pills and work effectively to burn fat only when combined with a healthy diet, proper lifestyle and a good exercise routine. Take them only under medical supervision, especially if you have a pre-existing condition like diabetes or hypertension.