Keto weight loss plateau - advice needed!

The short answer... You're going to have to eat less and/or exercise more.

I'm with @Lietchi, including the questions. (If you were losing fast and stopped rather suddenly, vs. loss tapering off slowly over many weeks, that suggests to me that "cut calories further" may not be the right answer.)

Also, 3 weeks is only minimally reaching the point where it might be a plateau, vs. just the normal non-linearity many people see during weight loss (the "stalls and whooshes" experience is not universal, but it seems pretty common.)

Among other things, very fast loss is a pretty major physical stress. Not only can that increase health risks, it can be counterproductive for weight management:

For one, it can cause subtle fatigue that bleeds calorie burn out of our routine (including purely physiological adaptation like slower hair growth, even thinning longer term; slightly reduced base body temperature; etc. - not just doing less, resting more, reduced exercise motivation or intensity).

For two, stress related physiological changes can trigger creeping water weight gain, masking continuing fat loss on the scale, potentially for weeks at a time.

So, diet break could be a good idea. If there's weird water retention going on, that should help reverse it. More science-oriented run-down is in this thread, for your consideration:

http://community.myfitnesspal.com/en/discussion/10604863/of-refeeds-and-diet-breaks/p1

For sudden weight stalls, waiting it out, or taking a diet break, can be a decent approach.

Ritagettinfit wrote: »

I would fast for 16-20 hours to shock your immune system. That's what I do when I plateau.

that is complete and total BS

OP - 3 weeks is NOT a plateau. See what others have said regarding that.

this is what weight loss looks like on a chart. this is my OWN weight loss over the past year.

Are you weighing and measuring all your food and drink and logging the calories? Keto, paleo, or whatever diet you choose to eat all comes down to calories in vs calories out.

Ritagettinfit wrote: »

I would fast for 16-20 hours to shock your immune system. That's what I do when I plateau.

LOL WUT?

This is utter nonsense. But since you brought it up, the burden is on you to substantiate your claims.

Please provide even one (!) peer-reviewed study that shows that:
A. a fast "shocks" your immune system*
B. your immune system being "shocked" would in any way solve the issue of a fat loss plateau

Hint: you won't be able to find either. Because they don't exist. You've been reading too many BS women's magazines with the likes of Dr. Oz on the covers...

*for even half a second, consider the evolutionary implications of someone's immune system being SHOCKED by food deprivation? DOUBLY SO if it resulted in FURTHER WEIGHT REDUCTION. You're literally saying that people who went without food for less than a day would have a sudden, otherwise inexplicable drop in bodyweight? Sweetheart, our species would have died out LONG AGO.