Sports and energy
Ketone esters
Also called: exogenous ketones, BHB, beta-hydroxybutyrate
Drinks that raise blood ketones without fasting.
- Why people take it
- Energy, weight loss, sport.
- What the evidence says
- Mixed and limited evidence.
- How it is usually taken
- Dosed by body weight before or during endurance events.
- Be careful
- Stomach upset; expensive.
- Medicines it can interact with
- May affect blood sugar in diabetes.
Other sports and energy
Common questions
What is Ketone esters?
Drinks that raise blood ketones without fasting.
Why do people take Ketone esters?
Energy, weight loss, sport.
Does Ketone esters work?
Mixed and limited evidence.
How much Ketone esters do people take?
Dosed by body weight before or during endurance events.
Is Ketone esters safe?
Stomach upset; expensive.
Does Ketone esters interact with medicines?
May affect blood sugar in diabetes.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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