With a severe caloric deficit for 4-6 days, intense hunger mostly goes away. If someone were significantly overweight, they might be able to survive 2-4 months

With a severe caloric deficit for 4-6 days, intense hunger mostly goes away. If someone were significantly overweight, they might be able to survive 2-4 months without significant caloric intake. The problem is numerous risks: neurological, cardiovascular, gall stones, osteoporosis, kidney and liver concerns. These are better than dying, sure, but it would be better to avoid tempting fate and permanent injury in the first place.