When you eat may matter almost as much as what you eat. A population-based study of over 7,000 Spanish adults published in the International Journal of Behavioral Nutrition and Physical Activity found that a later time of first meal was associated with a higher BMI, while a longer overnight fasting duration was associated with a lower BMI. These associations held after adjusting for total calorie intake, Mediterranean diet adherence, sleep quality, and physical activity, meaning the timing effect was independent of diet quality and calories. The relationship was particularly strong in premenopausal women, and a five-year longitudinal follow-up confirmed the pattern. Notably, the benefit of extended overnight fasting was most pronounced for people who had their first meal after 8:30 a.m., suggesting that late-eating patterns carry the most metabolic disruption and have the most to gain from shifting earlier. Meal timing is an underappreciated lever, and it's free. If you're working on weight management, shifting your first meal earlier and extending the gap between dinner and breakfast are practical starting points worth trying.

New research presented at the 2026 European Congress on Obesity found that obesity affects men and women in substantially different ways at the metabolic level, and the distinctions have real implications for treatment. The study, from Dokuz Eylul University in Turkey, analyzed 886 women and 248 men receiving care at an obesity clinic. Men showed significantly larger waist circumference (120 cm versus 108 cm), higher liver enzymes, higher triglycerides, and elevated markers of kidney stress, all pointing toward greater visceral fat accumulation and metabolic burden on the liver. Women showed higher total cholesterol (215 versus 203 mg/dL), higher LDL, and elevated inflammatory markers including C-reactive protein and erythrocyte sedimentation rate. These differences likely reflect estrogen's influence on fat distribution and immune function. Women tend to store more fat beneath the skin but mount a stronger systemic inflammatory response, while men accumulate the more metabolically dangerous visceral fat that surrounds internal organs. This pattern is consistent with what I observed over 20 years of clinical practice: two people with the same BMI can have profoundly different risk profiles, and effective treatment requires looking well beyond the number on the scale.

Eating the same foods day after day is associated with significantly better weight loss outcomes. A new study in Health Psychology tracked 112 adults through a 12-week behavioral weight loss program and found that participants with greater dietary repetition lost meaningfully more weight than those who varied their meals frequently. For every 10% reduction in the proportion of unique foods eaten, total weight loss improved by 0.5%. Caloric stability across days showed a similar pattern. The mechanism is well-established: novelty drives the brain's reward system, making food feel more pleasurable and harder to stop eating. When you eat the same foods repeatedly, they lose their appeal, and you naturally consume less without fighting your appetite. In my years of clinical practice, recommending a meal rotation over dietary variety was one of the most effective strategies I used, partly because it worked well and partly because it removed one of the biggest friction points people face when changing their eating habits: having to plan something new every day. If you're working on weight management, rotating through a small set of go-to meals may get you further than chasing variety.

BMI is a blunt instrument, and a growing body of research is making this clearer every year. New findings presented at the American Heart Association's EPI|Lifestyle Scientific Sessions 2026 underscore a point I've emphasized for a long time in functional medicine: body composition matters more than what the scale says. Researchers analyzed health data from nearly 2,000 African American adults over a median follow-up of 6.9 years, tracking who developed heart failure. Higher waist circumference and waist-to-height ratio were each associated with meaningfully increased heart failure risk; higher BMI, on its own, was not. Inflammation appears to be the connecting mechanism; visceral fat is not passive stored energy, it is metabolically active tissue that drives systemic inflammation, disrupts immune function, and contributes to cardiovascular damage. Inflammation accounted for roughly one-third of the link between belly fat and heart failure in this study. Worth noting: these are preliminary findings presented at a conference and have not yet been peer-reviewed, so some caution is warranted. That said, they align with a substantial body of existing evidence. A simple tape measure around your waist may give you more clinically meaningful information about your cardiovascular health than the number on the scale.

It's like I've been saying this whole time… GLP-1 drugs are NOT a weight loss panacea. I'm not saying these don't have a place in medicine at all… For some people with SEVERE metabolic dysfunction, perhaps they can be a tool (when all else has failed). But for the VAST majority of humans, GLP-1s are a huge NET NEGATIVE in my opinion. Of course, the mainstream media, longevity enthusiasts, celebrities, even some pretty smart individuals I respect have been singing praises about GLP-1s… How millions of peoples’ lives have been changed. Hundreds of pounds lost. Overeating and cravings silenced. Behaviors changed. Confidence regained. But a major new systematic review and meta-analysis published in The BMJ just gave us the answer to the question we’re all asking… What happens when you STOP? The study looked at 37 studies involving over 9,300 participants who discontinued GLP-1 medications after losing weight... And guess what happened? Weight regain was FASTER than what we see after behavioral interventions like diet and exercise changes - about 0.3 kg (0.7 pounds) per month faster. And people were estimated to regain a significant portion of their lost weight within 18 months But here's what really caught my attention... It's not just the weight that comes back – your hunger signals return with a VENGEANCE. When you stop taking GLP-1s, your appetite doesn't just "normalize"... It actually rebounds HARDER than before. The research shows that weight loss triggers compensatory responses in your body – increased ghrelin (the hunger hormone), decreased leptin, reduced metabolic rate, and ramped-up appetite signals from the hypothalamus. GLP-1 drugs artificially suppress all of this while you're taking them... But the second you stop? Your body's defense mechanisms kick in HARD. Increased hunger... reduced satiety... greater cravings... decreased ability to resist food. It's like your biology is PUNISHING you for trying to take a shortcut (sounds familiar?)