Weight-loss & macronutrient diets
Clean eating
A loosely defined approach centred on whole or minimally processed foods. There is no single regulated definition, and versions range from sensible to extreme.
What people typically eat
In mainstream versions: vegetables, fruit, wholegrains, lean protein, nuts and home-cooked meals.
What is restricted
Varies by version, commonly processed foods, refined sugar and white flour; extreme versions cut dairy, gluten or entire food groups without medical reason.
Why people try it
A desire to eat "naturally" and avoid ultra-processed food.
Realistic advantages
- Moderate versions simply restate good advice: cook more, eat fewer ultra-processed foods
- Often increases vegetable and wholegrain intake
- Can build useful cooking habits
Realistic disadvantages
- Undefined, anyone can sell anything under the label
- Moralising food as "clean" or "dirty" is linked to disordered eating patterns
- Extreme versions cause unnecessary restriction and nutrient gaps
Strength of evidence
Limited evidence
No standardised definition means no direct trial evidence; its sensible core borrows evidence from whole-food patterns.
Likely cost and difficulty
Moderate cost; moderate difficulty.
Nutritional risks
The main risk is psychological, rigidity and food guilt, plus nutrient gaps in extreme versions.
Who should avoid it
Anyone with a history of disordered eating should avoid rule-heavy versions.
Is professional supervision advisable?
Not required for moderate versions; seek help if food rules start to dominate your life.
References
Written by the Slimr editorial team. How we review diets.
