Fitbit calorie deficit

If you go to your settings and uncheck "Enable Negative Calorie Adjustments" it should do just that.

However, while I have since backtracked- I lost most of my weight using my old fitbit with a HRM (that I no longer have) and eating back my calories when I felt like it. I found it to be really accurate and I still lost at a rate I was happy with (and I'm a bit greedy).

Not my beeswax at all, but I hope you don't deprive yourself of them. You can feel like a failure when you're over your cals but still hungry, not realizing you've burned quite a few. Maybe keep an open mind to having them available if you need them.

Having my FitBit synced with MFP is one of the best features of the two systems and when it’s not working it drives me crazy!

I’m curious why you wouldn’t want to have that feature enabled to add in the calories adjustments?

Maybe you don’t understand what the adjustments represent? It’s the difference between what MFP thinks you would burn for NEAT (non Exercise) based on the stats you provided, and what FitBit projects you will burn based on your actual activity (exercise and NEAT).

Eating back calories from exercise is important as it ensures you are properly fueling your activity and that you don’t have too big of a calorie deficit which can have some adverse effects.

If you are concerned about inflated numbers, do you have negative calorie adjustments enabled? That helps keeps MFP in check if you have a less active day than normal.

I’ve had MFP and FitBit synced for about 5 years, and I’ve trusted and eaten back the adjustments the whole time. I’ve lost the weight I set out to lose and am currently a few years into maintenance.

That said, there are other things you can do to make sure the tools work well, build your confidence and provide the best results for you.

Are they set up with the same goals and stats?

Is your weight loss goal reasonable for the amount of weight you have to lose? If it’s less than 50 lbs it shouldn’t be more than 1 lb/week. If less than 20 lbs, then 0.5 lb/wk

Is your activity level set to represent your real activity? Many people set themselves to Sedentary when their step count and activity would suggest higher. That can lead to big adjustments and a distrust of the numbers.

Are you logging your intake accurately? Using a food scale? Making sure you’re being accurate with the CI side of the CICO equation helps identify areas of concern on the CO side for further attention.