Evidence-based nutrition

We read the studies. You get the answers.

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The Definitive Guide

How fat loss actually works

The difference between low-carb and balanced diets was about one kilogram. The starvation mode panic came from 14 reality TV contestants. Moderate weights preserve more muscle than heavy lifting during a cut. After 31,826 participants, the whole answer is simpler than the internet makes it sound.

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You need a specific diet (keto, clean eating, IIFYM) to lose fat
Your metabolism is broken from dieting (starvation mode)
You must push through your diet without stopping
Going faster gets you there sooner
5 studies 2 meta-analyses Triple-verified Explore cluster →
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What the evidence says
How do I lose belly fat specifically — can I target it? Your body loses fat from everywhere when you eat less than you burn, but it decides the order — and belly fat is typically last to go for… 3:15 · 2 studies
Does It Matter What You Eat, or Just How Much, for Fat Loss? Your body loses fat when you eat less energy than you burn. Whether those calories come from pasta, chicken, or butter does not meaningfully change the outcome. The… 3:15 · 4 studies
Cardio vs. Weights for Fat Loss: Which Exercise Actually Changes Your Body? When you diet without exercising, roughly a quarter of the weight you lose is muscle. Adding resistance training can cut that muscle loss in half. The surprise: you… 2:45 · 3 studies
How Fast Can I Realistically Lose Fat? Losing fat faster means losing more muscle along with it. A 62-study analysis found a clear line at about 500 calories per day: below it, lifting weights protects… 2:29 · 6 studies
Can protein change whether you lose fat or muscle during a cut? When you eat fewer calories to lose weight, your body has to get energy from somewhere — either from your fat stores or from your muscle tissue. Eating… 2:50 · 3 studies
Do Diet Breaks Work — Can You Pause a Cut Without Losing Progress? Twelve studies tested what happens when dieters take planned breaks at normal calories instead of dieting straight through. Both groups lost the same amount of weight, fat, and… 2:45 · 3 studies
Is Starvation Mode Real — Will Dieting Slow Your Metabolism? When you eat less to lose weight, your body burns slightly fewer calories than expected — scientists call this adaptive thermogenesis. Across 33 studies and over 2,500 people,… 2:50 · 5 studies
How Do I Protect My Muscle Mass on Ozempic or Other GLP-1 Medications? When you lose weight in a calorie deficit, your body burns both fat and muscle for fuel. Studies found that eating enough protein and doing resistance training shifts… 3:30 · 4 studies
Do I Have to Count Calories to Lose Weight — or Is There Another Way? People who count calories lose about 3.3 kilograms more per year than people in similar programmes who don't track. That's roughly 275 grams per month — real, but… 3:20 · 3 studies
The papers we actually read
Diet Break Metabolism — The Willpower Tax Nobody Warned You About Diet breaks produced identical body composition outcomes to continuous dieting across 12 studies and 881 people, while preserving 47 more… Poon et al. · 2024 · Nutrition Reviews · n=881
Calorie Counting Adds Exactly 3.3 kg (37 Studies) Calorie counting was associated with 3.3 kg of additional weight loss over 12 months across 37 studies — a significant… Hartmann-Boyce et al. · 2014 · Obesity Reviews · n=13,453
Best Exercise to Lose Fat Not Muscle — The Scale Gets It Backwards Resistance training outranked all aerobic exercise for preserving muscle during a calorie deficit, while moderate intensity ranked above heavy —… Xie et al. · 2025 · Frontiers in Nutrition · n=4,429
Your Broken Metabolism Costs You One Tablespoon Per Day Metabolic adaptation after weight loss costs 30 to 100 calories per day — one tablespoon of peanut butter — and… Nunes et al. · 2021 · British Journal of Nutrition · n=2,528
Low-Carb vs Balanced Diet for Weight Loss — 61 Trials Later A Cochrane review of 61 trials and 6,925 people found little to no meaningful difference in weight loss between low-carbohydrate… Naude et al. · 2022 · Cochrane Database of Systematic Reviews · n=6,925
Science in two minutes
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fat-loss

Trials tested fat at 10%, 20%, 29%, 40%, 45%, and 76% of daily calories in more than 1,400 people. Weight loss was the same at every level.

Every Fat Percentage Lost the Same Weight
3 min read 582 words
fat-loss

The meta-analysis confirmed what cold plunge companies never mention: the extra calories were real, the fat loss was not.

Cold Exposure Burns 188 Extra Calories a Day. Nobody Lost Weight.
2 min read 461 words
fat-loss

Stanford spent $8.2 million testing whether your genes determine which diet works for you. They don't. A body-shape quiz from the 1940s never had a chance.

Stanford Tested Body Types With DNA. Your Genes Predicted Nothing.
3 min read 706 words
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