Evidence-backed eating patterns
Flexitarian diet
A predominantly vegetarian pattern that deliberately allows meat or fish occasionally, "flexible vegetarianism".
What people typically eat
Mostly plant foods, vegetables, fruit, wholegrains, beans, lentils, nuts, with meat or fish on some days or in small portions.
What is restricted
Meat and fish are reduced to occasional foods rather than daily staples; no absolute rules.
Why people try it
People use it to capture much of the benefit of vegetarian eating without giving up meat entirely.
Realistic advantages
- Highly sustainable because nothing is forbidden
- Associated with better weight and metabolic outcomes than typical Western diets
- Easy transition step towards more plant-forward eating
Realistic disadvantages
- Vague definition means health value depends on actual choices
- Without intention, it can drift back to a standard mixed diet
- No formal programme or community structure by default
Strength of evidence
Moderate evidence
Supported by cohort data on semi-vegetarian patterns; few dedicated trials.
Likely cost and difficulty
Low cost; low difficulty.
Nutritional risks
Very low.
Who should avoid it
No specific group.
Is professional supervision advisable?
Not required.
References
Written by the Slimr editorial team. How we review diets.
