Fasting is hugely popular when it comes to diet trends in 2025, but there’s a difference between intermittent fasting - such as the celebrity-approved 16:8 intermittent fasting plan that went viral - and medically supervised fasting, which involves a considerable restriction of food intake for 10 to 21 days. The latter type of therapeutic fasting is by no means a fad diet trend - it's a way of eating that's guided by doctors. The calorie cut is steep, though; only about 250 calories a day are ingested in the form of vegetable broths or juices. It's controversial and sounds so severe - but is it dangerous? What should you know before speaking to a doctor about this eating plan?

Although it has both fans and detractors, therapeutic fasting is a serious, scientifically backed treatme

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