Have you heard people talking about intermittent fasting? Fasting involves organizing your eating into a schedule of extended periods without food consumption punctuated by smaller windows where you’re allowed to eat, and proponents claim it can help you lose weight, prevent illness, and even add years to your life. But what is the intermittent fasting diet, and should you try it? Here are some facts to consider.
As the name implies, intermittent fasting means cycling between eating and fasting. Unlike most diets, which tell you what you should and shouldn’t eat, intermittent fasting is all about when you eat. Although this type of diet may seem like a new phenomenon, Healthline reports that humans have actually been fasting for thousands of years, whether because they simply didn’t have much food, for religious reasons, or during periods of illness. As modern science has explored the potential health benefits of intermittent fasting, this way of eating has become increasingly popular. As explained by Men’s Journal, there are a few different ways to fast intermittently.
This method involves consuming nothing but water plus 500 calories (200 of which should be protein) for 24 hours, then eating the way you want for 24 hours. The 500 calories can come from one meal or spread out through the day. This cycle is repeated every two days, so you get to eat what you want every other day.
To follow this diet, you pick two non-consecutive days every week to consume no more than 500 calories, including 200 calories from protein (all at once or spread throughout the day). Then you eat whatever you want the other five days of the week. People like this diet because they find only two days of fasting to be manageable, especially when they know they can eat anything on non-fasting days.
You already fast at night while sleeping, and this diet extends that fast. Also known as time-restricted feeding, the 16:8 diet involves fasting each day for 16 hours out of 24, then eating whatever you want during an eight-hour window. Many followers of this diet don’t eat anything before noon and stop eating at 8 pm. If you’re not much of a breakfast eater anyway, this diet may be relatively easy for you to implement.
Valter Longo, PhD from USC has developed a very strict diet meant to be followed for 5 days at a time (done every 3 months or so, depending on your own medical issues) which he espouses is the best way to gain the longevity benefits from fasting. He writes about the science behind his approach in his book, The Longevity Diet. I’m planning to give his diet a try – so I’ll keep you posted how that goes.
Intermittent fasting has the potential to improve health in a number of ways, including:
Wondering what others areas of your health could use your attention? Consider taking my Optimal Men’s Health quiz. It’s designed to help you determine your next best step to getting healthier and closer to winning.
Myles Spar, MD, MPH is board certified in Internal Medicine and in Integrative Medicine. As a clinician, teacher and researcher on faculty of the top Integrative Medical Center in the U.S., he has led the charge for a more proactive, holistic and personalized approach to care that focuses on cutting edge technology and preventative care. Dr. Spar has been a consultant with the NBA, presented a TEDx Talk, appeared on national television, and been featured in publications such as the Men’s Journal and the Los Angeles Times. He is National Director and V.P. of Medical Services for AndHealth, a digital health company utilizing lifestyle medicine approaches to reverse chronic illness. He is available on a limited basis to consult with individual patients interested in a personalized approach to optimal performance and health.
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