Is Alternate-Day Intermittent Fasting Safe?
There is ongoing debate about whether fasting every other day poses any health risks. Specifically, concerns have been raised about the impact on cholesterol levels and cognitive abilities. Studies on intermittent fasting have produced mixed results, with some showing no effects on cognition and others lacking consensus on which cognitive functions may be affected. Additionally, no harmful psychological effects of fasting have been found, and there may even be some psychological benefits. However, it is important to note that individuals with a history of eating disorders were excluded from these studies.
When it comes to bone health, research has shown that alternate-day fasting does not have a negative impact on bone density, even after significant weight loss. This is thought to be due to the high physical activity levels of individuals following this fasting regimen. However, the evidence is inconclusive regarding the preservation of lean body mass with intermittent fasting compared to continuous caloric restriction.
Interestingly, intermittent fasting has been associated with improvements in blood pressure and triglyceride levels, which are likely linked to reductions in body fat. It has also been shown to improve artery function, depending on dietary choices on non-fasting days. On the other hand, concerns have been raised about the short-term effects of fasting on LDL cholesterol levels, with some evidence suggesting a temporary increase after fasting.
Findings from a large trial comparing alternate-day fasting to continuous caloric restriction showed that while both groups lost a similar amount of weight, the impact on cholesterol levels was different. LDL cholesterol levels dropped in the continuous calorie-restriction group as expected, but remained high in the alternate-day fasting group.
For individuals considering alternate-day fasting, it is crucial to monitor cholesterol levels, especially if they have a history of high cholesterol. It is also important for diabetics to consult with a healthcare professional before embarking on any fasting regimen, as it can impact blood sugar levels and the efficacy of medications.
In conclusion, the evidence on the safety of alternate-day intermittent fasting is mixed. While some health benefits have been observed, such as improvements in blood pressure and artery function, concerns remain about its effects on cholesterol and cognitive function. Consultation with a healthcare professional is recommended, especially for individuals with specific health conditions or those taking medications.
For more information on intermittent fasting and related topics, consider exploring the articles mentioned below.
