What the Science Really Says About Ketogenic Diets and Heart Health

Feb 20, 2026

They unpack whether ketogenic diets really harm cardiovascular health and clarify which studies actually test true ketosis. They discuss how cholesterol often behaves differently on low carb and why triglycerides, HDL, insulin, and inflammation may matter more. They compare ketogenic approaches to DASH for blood pressure and explain how saturated fat in whole foods differs from processed high-fat/high-carb meals.

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INSIGHT

Not All 'Low-Carb' Studies Are Keto

Many studies labeled 'low-carb' are not true ketogenic diets and produce different metabolic effects.
Bret Scher warns we must check carbohydrate thresholds before judging keto's effects.

INSIGHT

LDL Response Varies Widely

LDL does not rise for most people on a ketogenic diet and responses vary between individuals.
Bret Scher emphasizes monitoring because a minority may still see meaningful LDL increases.

INSIGHT

Keto Improves Multiple Heart Risk Markers

Ketogenic diets reliably improve triglycerides, HDL, insulin resistance, inflammation, and visceral fat.
These metabolic improvements strongly reduce cardiovascular risk beyond LDL alone.

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February is Heart Health Month, making it the perfect time to challenge common misconceptions about diet and cardiovascular health.

One claim that always resurfaces? That ketogenic diets are bad for your heart. But when you take a closer look at the science, that assumption simply doesn’t hold up.

In this video, Dr. Bret Scher breaks down the real evidence behind ketogenic diets and cardiovascular risk, addressing:

✅ How many “keto” studies don’t actually study true ketogenic diets

✅ The truth about LDL cholesterol on keto (it doesn’t go up for everyone!)

✅ Why triglycerides, HDL, insulin, and inflammation may matter more than LDL

✅ How keto compares to DASH for blood pressure and metabolic health

✅ Why saturated fat from real food behaves differently in the body

✅ The critical difference between ultra-processed high-fat/high-carb diets and low-carb, whole-food ketogenic diets

💡 Using the most up-to-date clinical evidence, Dr. Scher explains why ketosis can be a heart-supportive strategy, especially for those with type 2 diabetes, hypertension, insulin resistance, or poor metabolic health.

If you’re interested in learning more about the safety of ketogenic therapy, check out our “Is Keto Safe” topic page: https://www.metabolicmind.org/resources/topics/is-keto-safe/

🔎 Have questions about how to apply metabolic therapies effectively? Submit them at metabolicmind.org/questions to be featured in a future Metabolic Mailbag episode.

#MetabolicMind #KetogenicTherapy #FoodAsMedicine #HeartHealth

Expert Featured:

Dr. Bret Scher

Baszucki Group Medical Director
https://x.com/bschermd

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Follow our channel for more information and education from Bret Scher, MD, FACC, including interviews with leading experts in Metabolic Psychiatry.

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About us:

Metabolic Mind is a non-profit initiative of Baszucki Group working to transform the study and treatment of mental disorders by exploring the connection between metabolism and brain health. We leverage the science of metabolic psychiatry and personal stories to offer education, community, and hope to people struggling with mental health challenges and those who care for them.

Our channel is for informational purposes only. We are not providing individual or group medical or healthcare advice nor establishing a provider-patient relationship. Many of the interventions we discuss can have dramatic or potentially dangerous effects if done without proper supervision. Consult your healthcare provider before changing your lifestyle or medications.