Fat burner

Fat burners are supplements intended to help a person lose weight or maintain an existing weight. A review by Jeukendrup (2011) found fat burners typically made claims like:
 * increasing fat metabolism
 * increasing energy expenditure
 * impairing fat absorption
 * increasing weight loss
 * increasing fat oxidation during exercise, or
 * somehow promote changes that increase fat metabolism.

Fat burner ingredients
Fat burners typically contain several ingredients.
 * Beta‐sitosterol
 * Caffeine
 * Calcium
 * Cayenne pepper extract (Capsaicin)
 * Carnitine
 * Choline
 * Conjugated linoleic acid (CLA)
 * Chromium
 * Dihydroxyacetone
 * Epigallocatechin gallate (EGCG)
 * Forskolin
 * Fucoxanthin
 * Garcinia cambogia
 * Green tea extracts
 * Hydroxycitrate (HCA)
 * Inositol
 * Kelp
 * Leucine
 * Lecithin
 * Lipase
 * Ma huang (Chinese ephedra)
 * Psyllium or psyllium husk
 * Pyruvate
 * Taurine
 * Tea

Evidence
Many supplements marketed as "fat burners" or for "weight management" make exaggerated or unproven claims about weight loss, typically claiming to increase energy metabolism. This is not the same as giving a feeling of energy - so-called fat burners supplements increase the body's requirements for energy.

Costs and availability
Typically sold over the counter, or on the internet.