Feast one day, fast the next—this bold rhythm is taking the wellness world by storm. As millions chase quick weight loss fixes and fatigue over calorie-counting grows, alternate-day fasting is stepping up as a surprisingly effective strategy. Backed by a new global review involving 99 studies and more than 6,500 participants, this eating pattern may outpace both the popular 16:8 routine and strict calorie-cutting diets. And it’s not just about trimming waistlines—it could also reboot metabolism, lower bad cholesterol, and help manage chronic health conditions. Could this be the diet trend that finally changes the game?

a new study has turned the spotlight on a diet strategy that may just be more effective than traditional intermittent fasting: alternate-day fasting (ADF). Coined as the feast-and-famine method, this dietary approach involves a full 24-hour fast every other day, and it might have more potential than the popular 16:8 or 5:2 fasting regimens.

Researchers from a global collaboration spanning the US, Scotland, Germany, and Canada have uncovered promising findings in a meta-analysis that reviewed 99 clinical studies and more than 6,500 participants. The results? Alternate-day fasting led to greater weight loss than continuous calorie restriction or other intermittent fasting strategies, including time-restricted eating and whole-day fasting.

What is Feast-and-Famine Diet Trend?

Alternate-day fasting isn’t exactly new, but its newfound support comes with a stronger scientific foundation. The diet requires individuals to abstain from caloric intake every other day while allowing regular eating on non-fasting days. While this sounds more intense than the popular 16:8 schedule, where food is consumed within an eight-hour window, results seem to speak for themselves.

The average participant in the reviewed studies had a body mass index (BMI) of 31, and a significant majority (89%) had pre-existing health conditions. This makes the findings especially relevant for people dealing with metabolic concerns such as diabetes, high blood pressure, or elevated cholesterol levels.

How ADF is Different from Intermittent Fasting Diet?

Unlike time-restricted eating (e.g., 16:8) or the 5:2 method (fasting for two days each week), alternate-day fasting applies a full-day fasting protocol every other day. This means that in a typical week you would fast for about 3-4 days with no calorie consumption.

What sets ADF apart is how it influences metabolism. Studies suggest that this method can boost metabolic rate, lower LDL ("bad") cholesterol and improve insulin sensitivity. These factors are crucial for people with obesity or those at risk of developing cardiovascular disease and type 2 diabetes.

Is ADF Clinically Significant?

Despite the results, researchers caution that ADF did not meet the clinical weight loss threshold of 2 kg often targeted in obesity treatment guidelines. Still, its efficacy relative to other diets offers a compelling alternative for individuals seeking variety or faster short-term results in their weight loss journey.

The authors of the study, published in The BMJ, urge caution and call for more long-term trials. "Minor differences were noted between some intermittent fasting diets and continuous energy restriction, with some benefit for an alternate day fasting strategy with weight loss in shorter duration trials," they noted.

That said, all intermittent fasting strategies, including time-restricted eating and whole-day fasting, led to some degree of weight loss when compared to an ad-libitum diet one without any restrictions.

Experts increasingly view it as a flexible tool that can be customized within a broader, patient-centric model of nutritional care. The new findings support using ADF as part of this toolkit, especially for those who have tried and plateaued with traditional calorie-restriction diets.

According to the World Health Organization, approximately 2.5 billion adults globally are overweight, and 890 million live with obesity. With rates of metabolic syndrome, heart disease, and type 2 diabetes continuing to climb, effective, sustainable, and personalized weight management strategies are more imprtant than ever.

GLP-1 Drugs vs. Fasting: What To Choose For Weight Loss?

Coinciding with the release of this study is the NHS’s decision to allow general practitioners in England to prescribe Mounjaro (tirzepatide), a medication known for its significant weight loss effects. While effective, these medications are expensive and not without side effects.

As a result, dietary strategies like ADF offer an attractive, non-pharmaceutical option for those who may prefer or require lifestyle-based interventions.

Though ADF is proving its mettle in short-term studies, researchers emphasize the need for longer and more rigorous trials. Only with extended observation can we understand whether these weight loss benefits are sustainable, whether metabolic advantages persist and how feasible it is for individuals to stick with such a demanding regimen.

For now, ADF appears to be a promising alternative—particularly for those seeking to shake up their diet strategy or accelerate initial weight loss. Still, it should be undertaken with professional guidance, especially for individuals with underlying health conditions.

Feast-and-famine may sound extreme, but science is increasingly pointing to its potential to outperform more common intermittent fasting techniques. While not a silver bullet, alternate-day fasting offers a new hope for those grappling with weight loss or metabolic health challenges.

As with any diet, the key lies in personalization, consistency, and understanding your own body’s needs. With more long-term studies underway, ADF may soon become a more mainstream strategy for effective and sustainable weight management.

Ultra-processed foods (UPFs), typically high in salt, sugar, and unhealthy fats, have long been associated with obesity, diabetes, hypertension, and other chronic diseases.

Now, new research suggests that the vast majority of foods marketed for toddlers in the US fall into this category. A study led by the University of Texas at Austin found that more than 80% of toddler foods sold in US grocery stores are ultra-processed, while nearly half fail to meet at least one nutrient standard set by the World Health Organization (WHO) for commercial foods intended for children aged 6 to 36 months.

Majority Of Toddler Foods Are Ultra-Processed

Also read: Can Your Child’s Diet Shape Future Diabetes Risk? Study Links Ultra-Processed Foods To Early Insulin Responses

Researchers analyzed 2,783 toddler food products sold across 21 grocery stores in Texas. Using the Nova classification system, they found that 81% of products were ultra-processed, while 49% failed to meet at least one WHO nutrient standard.

Among the products analyzed:

• 81% were classified as ultra-processed.
• 17% exceeded WHO recommendations for sugar.
• 25% exceeded recommended sodium levels.
• 11% exceeded recommended fat levels.
• 12% exceeded recommended energy density.

Products that exceeded WHO recommendations included:

• Fruit pouches (high in sugar)
• Oat bars (high in sugar and calories)
• Mac and cheese (high in sodium and fat)
• Turkey sticks (high in sodium and fat)
• Cheese puffs (high in calories)
• Peanut butter puffs (high in sodium, fat, and calories)

“Many parents may assume that products sold on the baby/toddler food aisles of their grocery stores have to meet certain nutrient standards. Our findings highlight that half of the toddler foods available in local grocery stores do not,” said Erin A. Hudson, a University of Texas at Austin graduate student and science policy fellow with the American Society for Nutrition.

Hudson urged parents "to be vigilant in checking labels and ingredients to determine the nutrient content and processing level of products for their toddlers".

Read More: 'Let's Fix Our Food': India Launches New Policy To Fight Childhood Obesity, Boost Nutrition

Why Is This Concerning?

The toddler years are a crucial period for developing lifelong eating habits and taste preferences. Diets high in added sugars and ultra-processed foods during early childhood may increase the risk of obesity, diabetes, cardiovascular disease, and other chronic illnesses later in life.

The researchers found that ultra-processed toddler foods were significantly more likely to be high in sugar than less-processed alternatives. Excess sugar intake in young children has been consistently linked to poor health outcomes, including obesity and metabolic disorders.

The findings come as the US Food and Drug Administration (FDA) is considering new guidelines for front-of-package nutrition labels, healthy claims and marketing of food products to children. The US currently does not require warning labels on any food products that are high in sugar, sodium or calories.

What Are Ultra-Processed Foods?

Ultra-processed foods (UPFs) are industrially manufactured products made with ingredients and additives rarely used in home cooking, including preservatives, emulsifiers, artificial sweeteners, colorants, flavor enhancers, and hydrogenated oils. They are generally high in refined carbohydrates, added sugars, unhealthy fats, and sodium, while being low in fiber and other essential nutrients.

Research suggests that diets high in UPFs may promote chronic inflammation, disrupt the gut microbiome, and impair insulin regulation over time, potentially increasing the risk of obesity, type 2 diabetes, cardiovascular disease, and other chronic illnesses from an early age.

The monsoon season offers relief from the heat but also creates the perfect environment for bacteria, viruses, and fungi to multiply. As a result, stomach infections, food poisoning, diarrhea, and indigestion become more common.

Thus, fermented foods act as a natural probiotic to keep the gut healthy during the rainy season. They also support digestion, improve nutrient absorption, and may reduce the risk of digestive problems during the rainy season. However, the humidity can spoil the food.

HealthandMe spoke to experts who stressed good hygiene and freshly cooked meals. They also called for foods to be prepared

and stored safely to prevent contamination.

Common probiotic-rich homemade foods include:

• Curd (dahi)
• Buttermilk (chaas)
• Fermented rice (panta bhat)
• Idli and dosa batter
• Kanji
• Hygienically prepared homemade pickles

Why Fermented Foods Are Good During Monsoon

The experts said that homemade fermented foods naturally contain beneficial bacteria (probiotics) that help maintain a healthy gut microbiome.

"Monsoon brings a natural dip in immunity, and gut health takes centre stage in staying resilient through the season. Fermented foods are one of the simplest ways to introduce live beneficial bacteria that aid digestion and strengthen the body's natural defence mechanisms," Dr. Eileen Canday, Head of Nutrition & Dietetics at Sir H. N. Reliance Foundation Hospital, Mumbai, told HealthandMe.

Riya Oswal, Clinical Nutritionist at Ruby Hall Clinic, said pairing good hygiene with probiotic-rich fermented foods can help support gut health and strengthen the body's natural defenses.

Why Fermented Foods Can Be Risky During Monsoon

Despite their benefits, fermented foods can become unsafe if they are not prepared or stored properly.

"The higher humidity and fluctuating temperatures during the monsoon create favorable conditions for harmful microorganisms if fermentation is not properly controlled," Dt. Deepali Sharma, Clinical Nutritionist at CK Birla Hospital, Delhi, told HealthandMe.

How to Prepare Fermented Foods Safely

Food safety becomes especially important during the rainy season. The experts recommended to:

• Wash hands thoroughly before preparing food.
• Use clean, sterilized utensils.
• Prepare foods with safe drinking (potable) water.
• Use fresh ingredients.
• Follow the recommended fermentation time and avoid over-fermentation in humid weather.
• Cover food properly while it ferments.
• Refrigerate fermented foods promptly after fermentation.
• Store them in clean, airtight containers.
• Consume them within the recommended storage period.

When Should You Throw Fermented Food Away?

Do not consume homemade fermented foods if they show signs of spoilage. Discard them if you notice:

• An unusual or foul smell
• Mold growth
• Discoloration
• A slimy texture
• An excessively sour taste

"Any fermented item that has been maintained at a temperature beyond the normal room temperature for too long must also be avoided, since it might carry dangerous microbes, even if everything seems fine at first glance," she said.

Who Should Be Extra Careful?

While fermented foods are generally safe for healthy individuals, some people should consult a doctor before consuming homemade fermented products, Oswal told HealthandMe.

These include:

• People with weakened immunity
• Patients undergoing chemotherapy
• Organ transplant recipients
• Those receiving immunosuppressive therapy
• People with serious chronic illnesses
• Individuals with uncontrolled gastrointestinal diseases

Sharma added that infants, older adults with reduced immunity, and pregnant women should consume only freshly prepared and properly stored fermented foods during the monsoon to minimize the risk of infection.

The Indian Council of Medical Research–National Institute of Nutrition (ICMR-NIN) has launched a new policy document aimed at tackling childhood obesity and promoting healthier diets and food environments for children and adolescents in India.

Released under the multi-institutional 'Let's Fix Our Food' (LFOF) consortium, which was launched in 2022, the policy comes as India faces a growing burden of obesity and diet-related non-communicable diseases (NCDs), including diabetes, hypertension, cancer and respiratory illnesses.

The document outlines evidence-based recommendations to improve food environments and encourage healthier dietary habits among children and adolescents.

"Evidence-based, multisectoral policy action is essential to create healthier food environments for children and adolescents. Collaborative initiatives such as the Let's Fix Our Food Consortium are important for addressing the growing burden of overweight, obesity and diet-related non-communicable diseases in India," said Dr. M. Srinivas, Member (Health), NITI Aayog.

What Does The Policy Recommend?

The policy outlines recommendations across several areas, including:

• Healthy school food environments
• Nutrition literacy
• Front-of-pack nutrition labelling
• Regulation of unhealthy food marketing to children
• Taxation of foods high in fat, salt and sugar (HFSS)
• Healthier dietary fats
• Salt reduction
• Low-sodium salt substitutes
• Social and behavior change communication
• Youth engagement
• Fiscal measures to promote healthier diets.

India's Growing Obesity, Malnutrition Burden

The policy highlights India's growing double burden of malnutrition.

According to the National Family Health Survey-6 (NFHS-6) fact sheets for 2023–24, the prevalence of overweight children under five has increased to 3.4%, up from 2.1% in NFHS-4 and 1.3% in the previous survey.

The survey also found that although stunting among children under five has declined to 29.3%, acute malnutrition (wasting) remains unchanged at 5.2%, and only 15% of young children receive an adequate diet.

"Malnutrition is no longer only about undernutrition. Rising obesity, driven by unhealthy diets, challenges healthy growth among children and adolescents," said Marie-Claude Desilets, Chief of Nutrition, UNICEF India.

Key Recommendations

The Let's Fix Our Food Consortium was established to generate evidence and drive policy action for healthier food environments, particularly for children and adolescents. Based on multidisciplinary research and expert consultations, the policy recommends:

Stricter Advertising Rules

• Enforce legal restrictions on marketing HFSS foods to children and adolescents.
• Ban misleading health claims and deceptive advertising across all media.

Front-of-Pack Nutrition Labels

• Introduce mandatory, easy-to-read nutrition labels on packaged foods.
• Help consumers quickly identify products high in fat, salt and sugar.

Healthier School Food Environments

• Restrict junk food in and around schools.
• Ensure affordable, healthy food options and monitor school food environments using NEAT-S.

Tax Junk Food

• Levy taxes on HFSS foods and sugar-sweetened beverages to discourage consumption.
• Use fiscal measures to make healthier foods more affordable.

Strengthen National Programs

• Integrate these measures into initiatives such as the Ayushman Bharat School Health and Wellness Programme to promote better nutrition and physical activity.

New Tools to Support Healthy Eating

The consortium also launched practical tools to help schools and adolescents make healthier food choices.

• Nutrition Environment Assessment Toolkit for Schools (NEAT-S): A framework to help schools assess and improve their food environments by promoting healthier canteens.
• Digital Literacy Modules: An interactive e-learning platform and comic books developed by ICMR-NIN to help adolescents understand food labels and reduce their intake of excess sodium and unhealthy fats.

The initiative is supported by several national and international organizations, including UNICEF India, the Global Health Advocacy Incubator (GHAI), the Public Health Foundation of India (PHFI), the World Health Organization (WHO), the Food Safety and Standards Authority of India (FSSAI), and other partners.