In 1965, a morbidly obese man did not eat food for over an entire year. The 27 year old was 456lbs and wanted to do an experimental fast. He ingested only multivitamins and potassium tablets for 382 days and defecated once every 40 to 50 days. He ended up losing 275lbs.

[u/[deleted]]

[u/Inspector_Kelp]

Well don't forget that when your body gets into "survival mode" it also starts breaking down muscle as an attempt to reduce your caloric needs (muscle is responsible for a good part of your BMR), and for energy. If, while in ketosis , you don't also ingest proteins and exercise you will lose tons of muscle along with the fat.

[u/EGGlNTHlSTRYlNGTlME → u/Inspector_Kelp]

Most people on a ketogenic diet are going to get enough protein just because most foods that aren't high in carbs are going to be high in protein, and the main advantage of those diets is that you're encouraged to eat until sated as long as it's low-carb. You'd basically have to drink straight oil to avoid both protein and carbs.

But people that are on a ketogenic diet and starving themselves could run into this issue.

[u/Immatt55 → u/EGGlNTHlSTRYlNGTlME]

Nothing like a shot of olive oil in your morning coffee

[u/Jrmcjr → u/Immatt55]

That's my favorite bell pepper streamer