New scientific studies show that the body's own ketone body β-hydroxybutyrate (BHB) may have a surprising protective effect against malaria. BHB is produced in the human body primarily during fasting , on a low-carbohydrate (ketogenic) diet , or through certain fats such as MCT oil .
In recent studies, researchers have shown that mice in a state of ketosis were significantly better protected against malaria infection. The crucial factor was not the immune system alone, but the altered metabolism of the host – in particular the elevated BHB levels in the blood.
BHB acted directly on the malaria pathogen ( Plasmodium ):
The parasite was unable to develop and reproduce as effectively. This is because BHB disrupts important metabolic processes of the parasite, especially its energy production. As a result, the pathogen remains stuck in early developmental stages and loses its infectious power.
What's particularly exciting is that BHB is not a drug, but a natural metabolic product that the body produces itself. These studies clearly demonstrate for the first time that metabolic states such as fasting or ketosis can have a direct antimicrobial effect – independent of conventional medications.
We will now present the two studies:
https://www.nature.com/articles/s42255-025-01302-0
β-hydroxybutyrate inhibits Plasmodium falciparum development and confers protection against malaria in mice.
https://www.nature.com/articles/s42255-025-01310-0
A new study reveals that the host-derived ketone body, β-hydroxybutyrate, protects against malaria in mice by inhibiting Plasmodium development. These findings highlight the anti-microbial potential of metabolic interventions.
But "BHB" can do much more, see below...
Key learnings from the studies
Human metabolism plays an active role in protecting against infections.
β-Hydroxybutyrate (BHB) can directly inhibit the growth of pathogens.
Fasting and ketogenic metabolic states have not only metabolic but also potentially protective effects against infections .
The research opens up new perspectives on nutrition, fasting and metabolism as complementary approaches in prevention.
Important: The results are derived from animal models and cell cultures. They show great potential, but do not replace medical therapy .
What role does MCT oil play in this?
An interesting practical application:
MCT oil (medium chain triglycerides) can specifically stimulate the body's own production of BHB – even without complete fasting. MCT fats are rapidly converted into ketone bodies in the liver, thus allowing some of the metabolic benefits of fasting to be utilized in everyday life.
This makes MCT oil a practical way to gently increase BHB levels and temporarily put the body into a “fasting-like” metabolic state.
