Hi guys, I am 76kg and 167cm tall.

So I've started this Intermittent Fasting (16/8, 8pm-12pm fasting, 12pm-8pm eating period), coupled with LCHF. (brunch at 12pm which is 2 hard boiled eggs, cucumber and tomato, dinner at around 7pm which is 2 piece of chicken fillet and 2 type of vege, typically broccoli / cauliflower + bak choy / romaine lettuce). In 1 week, I've lost 3kg. I jogged on Tuesday, Thursday and Saturday, during none fasting period.

I've been reading online coz I want to do Fasted Cardio. Which means I'll wake up at 7am, jog with an empty stomach. But from my research, there is 2 camps, and it's very 50/50

Response A: yes it will burn even more fat.
Response B: it will still use ur muscle energy or something. The side effect will be ur muscle deteriorates.

Would like to know any fitness guru's take on this topic.

I workout empty stomach in the morning. Real actual heavy lifting. Last meal the day before between 11-11.30 pm.

I do this simply because i feel better, and the timing i workout is too early to get any food actually digested. I once tried working out abit later so that i can get some quick digesting breakfast in. But tbh my workout had always been worse.

Truth to be told, weight lost is still pretty much calories in calories out. As much as some ppl who claims they track and not lose/gain weight. It just means that 1) their tracking is not accurate enough or 2) they overestimate the amount of calories burnt.

You wanna lose mainly fat, eat less and do resistance training so that the body will keep the muscle. Its designed to survive in the first place.

At a certain point, you will eventually lose muscle regardless of fasted cardio or not.

That means I need to do ttde calculation everytime I drop in weight right? That would be more accurate?

Your calculation is correct but that's not metabolism adaptation. Its just your bodyweight dropped hence doesn't require that much energy to move.

So when your bodyweight dropped, then you need to recalculate the TDEE. Simple as that. Or everytime you drop 1kg, you reduce 100kcal.
One should not just reduce "calorie in" to lose weight.

The best way is to bump up your "calorie out" so that you can get alot more macro & micro-nutrients for healthy body.

Short answer is to stop being lazy. Exercise more, move more. Stop lying on bed for social media and sit whole day to watch tv/play games. Go for a walk, wash, clean, take stairs instead of elevator, etc.