hi instant noodles and intermittent fasting

It depends on what your goals are. If you're fasting for autophagy, it will probably stop the autophagy process, at least temporarily. If you're fasting for weight loss, the calorie content will most likely be negligible.

If it’s a true fast it has to be under 50 calories not to break the fast. You would probably do better to drink a bone broth. More vitamins and healthy. There are lots of different broths now. One thing I did was buy the box kind I’d buy pho broth, ramen broth and miso broth ( but look at calories if it’s high I wouldn’t use it) I’d drink the whole box for breakfast and lunch and have a sensible dinner. I found the volume was helpful to feel full but there are ways to achieve this. Also make sure you consume enough calories in your eating window or you will feel hungry! But I’ve done usually a keto coffee in morning to tide me over til my eating window ( some say it breaks the fast some call it fat fasting) but it’s my tool and works for me. As well I’d do more research on fasting if I were you so you can better understand autophagy and how it works bc this is what you are trying to achieve.