Popular & commercial diet systems
Juice cleanse
Replaces some or all solid food with fruit and vegetable juices for a limited period, typically one to seven days.
What people typically eat
Pressed juices at intervals through the day; nothing else in strict versions.
What is restricted
All solid food, caffeine, alcohol and usually protein and fat.
Why people try it
A "detox" or reset narrative, quick weight change, and a feeling of virtue.
Realistic advantages
- Short-term increase in fruit and vegetable intake
- A defined break from alcohol and processed food can reset habits
Realistic disadvantages
- The British Dietetic Association is explicit: the body detoxifies itself via liver and kidneys
- Juicing removes fibre, the most useful part of the produce
- Very low protein; hunger, headaches and irritability are common
- Any weight lost is water and gut content, regained within days
Strength of evidence
Weak / no evidence
No evidence for detoxification claims; the BDA advises against detox diets.
Likely cost and difficulty
High cost (cold-pressed juices are expensive); moderate difficulty.
Nutritional risks
Blood-sugar swings, inadequate protein, and real risk for people with diabetes or kidney disease (oxalates, potassium).
Who should avoid it
Diabetes, kidney disease, pregnancy, eating-disorder history.
Is professional supervision advisable?
Not recommended with medical conditions; not necessary at all, eat the whole fruit instead.
References
Written by the Slimr editorial team. How we review diets.
