For overall health? Working out and healthier eating is best.
Just losing weight? You can do that with only eating less and zero moving around (I did before with Keto, lost 14 kg in under 3 months. Now I was finally skinny, but skinny doesn't look great on a guy either).
Wow. That's a bit more than 1kg per week. I don't think you're supposed to do more than that. And your body will probably get rid of both fat and muscles if you just sit around, right?
Supposedly the really difficult thing is to stay at that (new) weight.
Anyways. Wish anyone the best and hope they'll get what they're working towards.
Yeah, it was definitely a little too fast, had a tiny bit of hair loss going (but that can always happen when you lose weight). But I just wasn't hungry in that time. When you only eat meat and veggies with a side of greek yogurt and berries the volume you can eat calorie wise is huge.
But Keto has other issues unfortunately (like possible diarrhea) so it's iffy. Also really tough to stick with it because you get carbs everywhere.