Studies Raise Questions About Keto's Impact on Liver and Heart Health
Dr. Joseph Mercola - Take Control of Your Health
Briana Mercola
4.6 • 1.6K Ratings
🗓️ 18 November 2025
⏱️ 8 minutes
🧾️ Download transcript
Summary
- While short-term ketogenic diets may aid weight loss, new research links prolonged ketosis to liver stress, impaired insulin secretion, and cardiovascular problems
- Long-term fat reliance increases circulating free fatty acids, burdening the liver, disrupting glucose regulation, and weakening metabolic flexibility — key factors in overall energy stability and heart health
- Elevated liver enzymes and triglyceride levels on keto indicate hepatic overload. This signals that the body is struggling to manage excess fat turnover and oxidation
- Treat keto as a short-term metabolic intervention, not a lifestyle diet. Gradually reintroduce whole-food carbohydrates to support steady energy, hormonal balance, and overall metabolic health
- To support balanced metabolism and long-term liver and heart health, keep total fat below 30% of daily calories, eliminate seed oils from your diet, and consume sufficient dietary fiber
Transcript
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| 0:00.0 | Are you pushing your metabolism into a corner with long-term low-carb and not noticing the early |
| 0:05.5 | signs from your liver and heart? |
| 0:07.0 | Welcome to Dr. Mercola's cellular wisdom. Stay informed with quick, easy-to-listen |
| 0:12.8 | summaries of our latest articles, perfect for when you're on the go. No reading required. |
| 0:17.2 | Subscribe for free at Mercola.com for the latest health insights. Hello, and welcome to Dr. |
| 0:22.9 | Mercola's cellular wisdom. I'm Ethan Foster. Today we're looking at new evidence that |
| 0:27.7 | prolonged ketogenic eating can strain your liver, disrupt insulin secretion, and raise cardiovascular |
| 0:34.2 | risks, and we'll lay out a safer path to support steady energy and metabolic health. |
| 0:39.2 | I'm Alara Skye. We're grounding this discussion in recent findings that linked extended |
| 0:44.1 | ketosis to hyperlipidemia, elevated liver enzymes, impaired glucose tolerance, and weaker insulin |
| 0:51.0 | release. We'll also outline practical steps the article recommends, |
| 0:55.6 | so you can course correct without guesswork. |
| 0:57.6 | The central warning is straightforward. Treat keto as a short-term metabolic intervention, |
| 1:03.3 | not a lifestyle. Long-term reliance on fat for fuel, increases circulating free fatty acids, |
| 1:09.6 | burdens your liver, and weakens metabolic flexibility. |
| 1:12.6 | When triglycerides and liver enzymes rise on keto, that signals hepatic overload, not progress. |
| 1:19.6 | A mouse study followed near year-long ketogenic feeding and found marked hyperlipidemia, |
| 1:24.6 | hepatic fat accumulation, and higher alanine amino transferase, |
| 1:30.2 | alongside glucose intolerance and reduced insulin secretion. |
| 1:33.9 | While animal data aren't human outcomes, the mechanisms of fat handling and protein processing |
| 1:39.6 | are conserved enough to warrant caution about extended ketosis. |
| 1:43.7 | The pancreatic picture matters. Disruptions showed up in beta cell protein conserved enough to warrant caution about extended ketosis. |
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