If you're going to eliminate carbohydrates from your diet (it sounds like you aren't, just refined sugar, but all the same) don't forget to replace your primary energy source! In your instance this will be lots of fat, oil, meat, etc. I don't eat a lot of sugar almost at all - it's not dietary, I just don't like sugar. I don't even like bread, or noodles, or fruit. There are very few sweet things I enjoy, and usually they have to be paired with something savory or spicy.
People always ask me how I'm so thin when all I do is eat deep fried pickles, pizzas drenched in oil, sticks of butter and globs of sour cream all day long. It's because fat is my primary energy source! (These things are obviously not a healthy diet - like I said, I'm not "on" a keto diet or doing this for health reasons, I just have an aversion to carbs and sugar. But I'll drink the hell out of a good beer! - lots of things are sugary, without being sweet, which is where I do get my actual carb intake from.)
If you don't make the switch, you will undoubtedly start to get super tired and run-down. Even if it seems unhealthy on the surface (from "fats are bad" being drilled into us at a young age), your body needs an alternative energy source to function, and as long as you moderate your intake,
fat is an acceptable (and tbh, primarily the
only) alternative. This is the basis of the ketogenic diet (which, if followed religiously, can actually induce something known as ketosis, or "sugar sickness," as our bodies adjust to a new energy source).
It should also be stated as
@Friday pointed out that carbohydrates are the
only form of energy that your brain actually uses. If you've ever had a PET scan, they actually inject you with mildly irradiated glucose as it travels right up to the brain. So even in those who are on ketogenic diets, should be consuming at least a portion of carbohydrates per day/week in order to maintain optimal brain health and cognition.
For me, I tend to get a lot of carbs from beer and processed foods that aren't sweet (like chips, French fries, etc).