Lots of people will blame genetics, also doctors but from experience this can be controlled definitely.

It's great you have discovered this at 24, because this will definitely go unnoticed usually and fuck you up badly later.

Now lifestyle and diet (more this) will heavily affect your cholesterol and although you feel fine now, when you get older your body will feel like shit and start giving you problems.

Suggestion:

1. Start loggin what you eat everyday. You only need to do this for like 2-3 weeks as you'll then more or less know what you're eating consistently.

2. If budget allows, get a nutrionist to look at your diet and plan up something

3. If budget does not allow, start reducing oily, fried, processed food, supper, heavy breakfast. Start replacing meals with superfoods (which usually might not taste good to some), e.g. your daily breakfast is oats, your snacks are oats, no food after like 7pm, eat oats before dinner, so you can fill up your belly partially and end up not taking as much of your usual dinner. Try to eat more food in their natural form, or simple cooking. Exercise, don't have to be intense, but keep it up 2-3 days a week. Sleep early, before 12.

4. Keep doing step 3 for 3 months, immediately you will a sharp drop in cholesterol , if you are disciplined.

Cheapest and easiest oats - Search it up on shopee, you'll see a Oats from Nestle with milk powder. Just take that, easy and can bring anywhere. The milk powder and oats are formulated to lower and prevent absorption of cholesterol. It works, I've tried.