[45w7w8w48]

> bewildered by statements "I did 60 days of fasting/it is safe".

These people are either overweight or even obese, or just lying to you, or lying to themselves (e.g., drinking juice and coffee, or getting calories elsewhere and not counting it). Also, I guarantee they're completely sedentary.

If you're reasonably physically active (especially if you do any weight training) and you're in a prolonged caloric deficit while already being lean, you will lose muscle mass and bone density, and ultimately get injured:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4834845/

[elmolino89]

Apart from the quacks no medical doctor imho will state: 60days fast is completely safe for any 250 pounder at any age and without a medical supervision.