Health and Me

Itisha Arya

Intermittent Fasting and Brain Health: Is There a Risk of Cognitive Decline?

intermittent fasting and brain health

<span>Intermittent fasting</span> is an eating plan that alternates between periods of eating and fasting on a set schedule. Studies show that intermittent fasting can help manage weight and even reduce the risk of certain diseases. But some people worry whether fasting could harm the brain or lead to cognitive decline. 

Researchers addressed this concern in a paper published in Psychological Bulletin, reporting that short-term fasting of less than 24 hours does not appear to affect the mental performance of adults.

Intermittent fasting is an eating pattern that involves alternating between times when you don’t eat and times when you do, sometimes with calorie restrictions on specific days.

This practice dates back thousands of years and is woven into several cultural and religious traditions. Scientists began studying it for weight control in the early 1900s, and recent research has expanded to explore its broader health effects.

There are three widely followed types of intermittent fasting, as per Healthline:

<ul><li>Time-restricted eating: You eat within a fixed time window and fast during the remaining hours. The 16/8 pattern is the most popular, where you eat during an 8-hour window and fast for 16 hours (including sleep). Other variations include 14/10 and 20/4.</li><li>Alternate-day fasting: You rotate between normal eating days and fasting days, when you consume very few calories, around 500 on average. Some prefer spreading this limited intake across the day, while others eat one small meal.</li><li>5:2 fasting: Instead of alternating daily, this plan limits calorie intake to 500–800 calories on two chosen days each week, while the rest of the week follows a regular eating routine.</li></ul>

<h2><span rel="noindex">Intermittent Fasting and Brain Health</span>: How Are They Related?</h2>

Only recently have scientists started exploring how intermittent fasting influences the brain. Early findings suggest it might offer certain cognitive benefits as we age and even help reduce symptoms of anxiety or depression.

“Many people assume fasting will make it hard to focus or perform well at work or school,” said David Moreau, PhD, a neuroscientist at the University of Auckland and senior author of the study. “Our findings show that for most healthy adults, short-term fasting doesn’t significantly impact mental sharpness.”

The research did note that children and teenagers experienced slight declines in attention and memory while fasting, emphasizing the need for a balanced breakfast before school. Adults, meanwhile, tended to perform a little worse later in the day while fasting, possibly because hunger can heighten natural dips in alertness due to circadian rhythm.

“Humans evolved with periods of limited food, so it makes sense our brains can function well without constant eating,” Dr. Moreau added. “Still, younger people seem more affected, which aligns with their higher energy demands.”

<h2>Intermittent Fasting Unlikely to Cause Cognitive Decline</h2>

According to recent studies, as per Healthline, intermittent fasting is unlikely to cause cognitive decline. Experts who reviewed the findings say it reinforces the safety and benefits of fasting. “The key takeaway is that fasting doesn’t harm mental performance,” said Dr. Mir Ali, bariatric surgeon and medical director at the MemorialCare Surgical Weight Loss Center, California.

The meta-analysis reviewed 63 studies across the world, including over 3,400 participants. Most individuals fasted between 8 and 24 hours, with a median duration of 12 hours.

Researchers concluded that fasting “neither enhances nor impairs mental performance.” They identified three main factors that influence cognitive function:

<ul><li>Fasting duration</li><li>Type and timing of the cognitive test</li><li>Individual characteristics, such as age or body composition</li></ul>

They also noted that glycogen—the body’s stored form of glucose provides energy during normal eating. When glycogen levels fall during fasting, the body shifts to using ketones derived from fat as an alternate energy source.

<h2>How To Practise Intermittent Fasting?</h2>

Intermittent fasting is not suitable for everyone, particularly those with a history of eating disorders or women who are pregnant or breastfeeding. However, for most healthy adults, it offers flexibility in timing and approach.

During fasting hours, you can still drink water, black coffee, or unsweetened tea. Light exercise is also permitted. Healthline advises focusing on nutrient-rich meals during eating periods, staying hydrated, and maintaining good sleep habits.

For beginners, it’s best to start slowly,  perhaps by fasting for 6 to 8 hours at first, then gradually extending to 8–10 hours, and eventually to the more balanced 12–14-hour fasting window.

Health Conditions A-Z

health

intermittent fasting

Intermittent Fasting and Brain Health

Intermittent Fasting cognitive decline

intermittent fasting brain health

is intermittent fasting good for brain health

AHA’s New Dyslipidemia Guidelines Stress Early Screening, Lifestyle Management

Menstruation Not a Disability: Experts Call Mandatory Period Leaves Unnecessary, Urge Alternative Options

Is India set to implement a social media ban for children?

Nutrition

8 Sit-Up Variations to Strengthen Your Core and Build Stability

Benefits Of Ayurvedic Health Supplement Ashwagandha

9 Anti-Inflammatory Breakfast Options You Should Try

5 Foods You Should Avoid For PCOS, Says Gynecologist

Love Sitting With Your Legs Crossed? Here’s You Should Avoid It

6 Daily Foods That Are Secretly Increasing Your Calories

9 Brain Boosters You Should Do Everyday

Hip Exercises That Will Keep You Flexible As You Age

9 Leg Exercises Office Workers’ Should Do At Home

Benefits of Having Herbal Tea Every Morning

9 Daily Habits That Boost Your Brain Power

Lower-Body Exercises That Are Game-Changers

How Drinking Apple Cider Vinegar Helps You

Aging Myths You Should Never Believe

Superfoods That Support Your Gut Health

What Happens To Your Body When You Eat Instant Noodles Every Day?

Health Issues Premature Babies Often Face

Exercises Office Workers Should Do For Their Heart Health

Reasons Why You Should Add Raw Turmeric To Your Diet

Benefits Of Drinking Milk At Night: Why You Should Do It

Food That Provides Vitamin B12 Naturally In Your Diet

Surprising Health Benefits Of Fenugreek Seeds

9 Superfoods You Should Eat For Your Brain Health

What Does Mental Health Support Look Like At Work?

Long Stretches You Should Do To Unwind From Your Day

Colon Cancer In Young Adults: Early Symptoms You Should Know

Health Benefits Of Eating Dry Fruits Everyday

Are You At Risk For Fried Rice Syndrome?

These Tests Reveal How Well You Are Aging

Lower-Back Exercises You Should Do After A Long-Day's Work

Children’s Diet – What Kids Need To Eat For Immunity Building

Common Diabetes Myths That Could Hurt Your Health

Love Spicy Food? Here’s How It Affects Your Health

Superfood List: Veggies And Fruits You Must Have For Immunity

Foods People With IBS Should Avoid

Exercises To Improve Digestion

Easy Work Lunches You Can Make In The Morning

Hunger Vs Craving: Difference Explained In 60 seconds

These Things Can Cause Your Heart To Age Faster

High Carb Foods That Are Actually Healthy

Intermittent fasting is an eating plan that alternates between periods of eating and fasting on a set schedule. Studies show that intermittent fasting can help manage weight and even reduce the risk of certain diseases. But some people worry whether fasting could harm the brain or lead to cognitive decline. Researchers addressed this concern in a paper published in Psychological Bulletin, reporting that short-term fasting of less than 24 hours does not appear to affect the mental performance of adults.What Is Intermittent Fasting?Intermittent fasting is an eating pattern that involves alternating between times when you don’t eat and times when you do, sometimes with calorie restrictions on specific days.This practice dates back thousands of years and is woven into several cultural and religious traditions. Scientists began studying it for weight control in the early 1900s, and recent research has expanded to explore its broader health effects.There are three widely followed types of intermittent fasting, as per Healthline:Time-restricted eating: You eat within a fixed time window and fast during the remaining hours. The 16/8 pattern is the most popular, where you eat during an 8-hour window and fast for 16 hours (including sleep). Other variations include 14/10 and 20/4.Alternate-day fasting: You rotate between normal eating days and fasting days, when you consume very few calories, around 500 on average. Some prefer spreading this limited intake across the day, while others eat one small meal.5:2 fasting: Instead of alternating daily, this plan limits calorie intake to 500–800 calories on two chosen days each week, while the rest of the week follows a regular eating routine.Intermittent Fasting and Brain Health: How Are They Related?Only recently have scientists started exploring how intermittent fasting influences the brain. Early findings suggest it might offer certain cognitive benefits as we age and even help reduce symptoms of anxiety or depression.“Many people assume fasting will make it hard to focus or perform well at work or school,” said David Moreau, PhD, a neuroscientist at the University of Auckland and senior author of the study. “Our findings show that for most healthy adults, short-term fasting doesn’t significantly impact mental sharpness.”The research did note that children and teenagers experienced slight declines in attention and memory while fasting, emphasizing the need for a balanced breakfast before school. Adults, meanwhile, tended to perform a little worse later in the day while fasting, possibly because hunger can heighten natural dips in alertness due to circadian rhythm.“Humans evolved with periods of limited food, so it makes sense our brains can function well without constant eating,” Dr. Moreau added. “Still, younger people seem more affected, which aligns with their higher energy demands.”Intermittent Fasting Unlikely to Cause Cognitive DeclineAccording to recent studies, as per Healthline, intermittent fasting is unlikely to cause cognitive decline. Experts who reviewed the findings say it reinforces the safety and benefits of fasting. “The key takeaway is that fasting doesn’t harm mental performance,” said Dr. Mir Ali, bariatric surgeon and medical director at the MemorialCare Surgical Weight Loss Center, California.The meta-analysis reviewed 63 studies across the world, including over 3,400 participants. Most individuals fasted between 8 and 24 hours, with a median duration of 12 hours.Researchers concluded that fasting “neither enhances nor impairs mental performance.” They identified three main factors that influence cognitive function:Fasting durationType and timing of the cognitive testIndividual characteristics, such as age or body compositionThey also noted that glycogen—the body’s stored form of glucose provides energy during normal eating. When glycogen levels fall during fasting, the body shifts to using ketones derived from fat as an alternate energy source.How To Practise Intermittent Fasting?Intermittent fasting is not suitable for everyone, particularly those with a history of eating disorders or women who are pregnant or breastfeeding. However, for most healthy adults, it offers flexibility in timing and approach.During fasting hours, you can still drink water, black coffee, or unsweetened tea. Light exercise is also permitted. Healthline advises focusing on nutrient-rich meals during eating periods, staying hydrated, and maintaining good sleep habits.For beginners, it’s best to start slowly,  perhaps by fasting for 6 to 8 hours at first, then gradually extending to 8–10 hours, and eventually to the more balanced 12–14-hour fasting window.

intermittent fasting and brain health: is there a risk of cognitive decline?

About Us

Contact Us

Terms & Conditions

Privacy Policy

Company

Health and Me is a premium website with content written and curated to function as a handbook for all Health concerns.

Intermittent Fasting and Brain Health: Is There a Risk of Cognitive Decline?

David Protein Bars Faces Lawsuits For Understating Calories And Fat Content

Experts Share 7 Essential Nutrition Tips for Managing Chronic Kidney Disease | World Kidney Day

Avoid These Foods To Reduce Your Risk Of Chronic Diseases

Health Conditions A-Z

AHA’s New Dyslipidemia Guidelines Stress Early Screening, Lifestyle Management

Menstruation Not a Disability: Experts Call Mandatory Period Leaves Unnecessary, Urge Alternative Options

Is India set to implement a social media ban for children?