Exogenous ketone supplements — primarily beta-hydroxybutyrate (BHB) salts and esters — promise to deliver the benefits of ketosis without dietary restriction. The reality is more nuanced.
They temporarily elevate blood ketone levels, typically for 1–3 hours. During this window, you may experience improved mental clarity and reduced hunger.
Exogenous ketones do not cause fat loss on their own. They do not put you into ketosis if you are eating high-carb. They are a supplement to keto, not a replacement for it.
BHB salts are cheaper and more widely available but raise ketones modestly. Ketone esters raise ketones dramatically but are extremely expensive and taste terrible.
Exogenous ketones may help during the transition into ketosis, before intense training, or when breaking a fast. They are not necessary for most keto dieters.
MCT oil and fasting are more cost-effective ketone boosters. Our keto beverages — including bulletproof coffee with MCT oil — offer similar benefits at a fraction of the cost. Check our keto snack ideas for MCT-powered fat bombs too.