The immune system is deeply intertwined with metabolism. The ketogenic diet, by shifting the body’s metabolic state, has meaningful effects on immune function — most of them positive.
BHB (beta-hydroxybutyrate) inhibits the NLRP3 inflammasome, reducing pro-inflammatory cytokines. Chronic low-grade inflammation suppresses immune function — reducing it improves immune responsiveness.
High blood sugar impairs white blood cell function. People with diabetes are significantly more susceptible to infections. By normalising blood glucose, keto supports healthy immune cell activity.
The fasting periods common in keto practice (intermittent fasting, extended fasting) trigger autophagy — cellular “self-cleaning” — which removes damaged proteins and pathogens, strengthening immunity.
Ensure adequate vitamin C (from leafy greens and peppers), zinc (from meat and seeds), and vitamin D (from fatty fish and sun exposure) on keto. These are critical immune nutrients.
Fatty fish, garlic, ginger, turmeric, and leafy greens feature prominently in our gluten-free keto recipes and keto main dish collection.