Research
Mixed
Diet quality (minimally processed, whole foods) is a primary driver of weight loss independent of caloric restriction or macronutrient composition, as demonstrated by the DIETFITS trial.
Focus on eating whole, unprocessed foods (vegetables, fruits, whole grains) and minimizing added sugars and processed items. You do not need to strictly count calories if you prioritize diet quality, as this approach can lead to significant weight loss.
GoodSupportsHIGH confidence
The major finding of this study was that both diets delivered a significant weight loss... Interestingly, this effect was independent of genotype patterns or carbohydrate tolerance... diet quality defined as low intake of added sugars and highly processed foods and high intake of fruit, vegetables and whole-grain products, independent of energy intake, is fundamental for weight loss in overweight and obese adults.
Why this rating
Based on a specific RCT (DIETFITS) cited in the review.
Source
Defining the Optimal Dietary Approach for Safe, Effective and Sustainable Weight Loss in Overweight and Obese Adults
Chrysi Koliaki et al. · Healthcare · 2018
DOI 10.3390/healthcare6030073
narrative_reviewCited 139×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
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- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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