Carbs really get a bad rap primarily because people say it causes either fat gain or raises insulin levels.
(1) Your brain needs carbs because it needs glucose.
Carbs and Insulin
(2) What is Insulin? It is a hormone that ABSORBS fat and glucose from the bloodstream and places them into cells for energy. Yes, carbs being digested and converted into glucose does raise insulin levels, but rising insulin levels aren’t necessarily bad because they are necessary for energy. Excess insulin is bad and that occurs because once your body’s cells have all the insulin they need, there is nowhere for the excess insulin to go, hence one starts to develop a myriad of problems like glucose dysregulation, which causes certain illnesses like chronic inflammation that leads to other issues. I, personally, get most of my simple sugars from fruits, oatmeal, dates, etc..., not candy, ice creams, cakes, and other bad foods.
Carbs and weight
(3) It's unlikely that your carbs are causing you to be fat unless you are eating them in excess consistently or you are not consuming enough fat. Read the paragraph and check out the links:
Lipogenesis is a term used to describe a process of fatty acid and triglyceride synthesis from glucose or other substrates. This specific biosynthesis takes place predominantly in the liver, while its occurrence in the adipose tissue is of minor significance – even under conditions of substantial carbohydrate overfeeding. Although our understanding of biochemistry and hormonal regulation of lipogenesis stems from in vitro research on rodents, the biological importance, activity and tissue distribution of the lipogenic pathways show considerable variation among different species. In humans, lipogenesis plays an important role in physiologic and pathophysiologic conditions.
What is Lipogenesis?
Lipogenesis - an overview | ScienceDirect Topics
NOTE: when I am talking about carbs, I am not talking about 'refined carbs' which are processed carbs. Stay away from/limit processed foods.
Fat
Your body needs carbs and protein (especially if you are a bodybuilder/powerlifter/athlete), and good fat. 'Good fat' means whatever fats that will increase Omega-3 and some omega-6. A doctor gave me a ratio of 2(omega-6):1(omega-3), which is optimal for your brain health. But the reason we need to consume more vegetables, fruits, and beans is that they contain Alpha-linolenic acid which in turn creates DHA ("Docosahexaenoic acid") or Omega-3. Don't consume fatty foods because they slow your blood flow which causes the heart to work unnecessarily harder.
Also, to add
Preworkout powder
Very unnecessary. Bananas, oatmeal, and protein whey is a much much better pre-workout alternative to powder because the food contains nutrients your body needs.
All in all, consult your nutritionist and doctor because I am just some random on thecoli. But, I stand by my previous post in the other thread stating carb and protein-rich and low fat is the best diet.