How much of a calorie deficit is too much?

[RenegadeKeeblerElf]

I have a large amount of weight to lose, and so my TDEE is quite high. I'm using MFP to track calories and when I put in a goal of losing 1kg/week (which is already at the high end of a healthy weight loss) it gives me a daily calorie allowance of 1750. I did my first jab (MJ) last Friday and have averaged about 13-1400 calories quite happily. I'd like to stick with that as I think eating more just for the sake of it would reinforce bad habits that I want to get rid of. But I'm worried that if I lose too fast it could be unhealthy. Is it ok to have a big calorie deficit if the amount of calories I'm eating is still a healthy amount (ie not a VLC diet amount)?

@Shmee1988 I didn’t write 10st 7lbs, I wrote 10.7 stones. So ten stones and 70% of a stone. 10.7 stone is mixing Imperial and metric notation in a confusing way. Hence the confusion that you and others are showing. Imperial measurements should be written fully in Imperial notation, to avoid this.

But thats still not correct though is it? 70% of a stone is 9.8lbs.
50% of a stone is 7lbs. Im confused

70% of a stone is 9.8lbs, which rounds up to 10lbs. 150lbs is 10st (140 pounds, 10 x 14) plus 10lbs. So, 10st and 70% of a stone.

That's nowhere near enough protein. Please increase your protein and worry less about calories. A deficit is too much if it means you don't get enough nutrients and if you're eating that little protein then you aren't properly nourished and will lose a lot of muscle.

You have misread and misunderstood decimal points

Writing “10.7 stone” is mixing Imperial and metric in a confusing way. It means 10st plus seven tenths of a stone, NOT 10st 7lbs.

How do you expect to build muscle on 800 calories or whatever you're on? You need a minimum of 1g protein per kg of body weight just to maintain your muscle and 1.2-2g to grow it. Thats impossible on a VLCD.

Sorry, please absolutely ignore me! I misread what you'd said and you're obviously right. 10.7st is 10st 9.8lbs so rounded up is 10st 10lbs. Im with you now. Apologies again, its been a really long day amd I think I left my brain at my desk