Does anyone know what type of big this is or worm or slug or something

Hello Friend, I don't think so that it is a worm or a slug. This more looks like a larvae of an insect. I am pretty sure that is is Black Soldier Fly Larvae.

If you search up "Black Soldier Fly Larvae" you would see lots of information about them. Or you can just search up "Black larvae" and see which image matches to yours the best.

Hope this Helps!!!

~Your Friendly user

~RecklessChicken

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.