A popular dieting trend, intermittent fasting, could carry hidden risks for heart health, according to a new study published in the journal Diabetes and Metabolic Syndrome.
Researchers analysed data from more than 19,000 adults and found that people following the 16:8 fasting method—eating within an 8-hour window and fasting for 16 hours—had a significantly higher risk of death from cardiovascular disease.
What the Study Found
- Participants who restricted eating to less than 8 hours a day were 135% more likely to die from heart-related illnesses compared to those who spread meals across 12–14 hours.
- This increased risk held true across different groups, including age, race, ethnicity, and socioeconomic background.
- No significant link was found between intermittent fasting and cancer mortality or overall life expectancy.
Why It Matters
Intermittent fasting has long been promoted for benefits like:
✔️ Improved insulin sensitivity
✔️ Better blood pressure control
✔️ Reduced inflammation
✔️ Improved cholesterol and lipid profiles
But experts warn that such extreme meal-timing patterns may also cause nutrient deficiencies, excessive hunger, headaches, and irritability over time.
What Experts Say
Victor Wenze Zhong, senior author of the study, cautioned:
“People should be extremely cautious about adopting a short eating window for years to pursue cardiovascular health or longevity. There is no evidence from long-term human studies to support this.”
This follows a 2024 American Heart Association report, which also linked the 16:8 fasting method to a 91% higher risk of cardiovascular death.
Takeaway
While intermittent fasting may offer short-term health benefits, researchers urge caution for those considering long-term adoption, particularly for heart health. More evidence is needed before fasting can be recommended as a safe strategy for preventing cardiovascular disease.
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