Reducing carbs and brain fog...

I sympathise on the weight plateau.
Mine's been stuck the best part of a year. However, I haven't gained anything. so I just keep going.
I suggest you write down what you eat, including snacks. You might find your answer there.
Most low carbers find their minds sharpen up.

Apparently fat is a toxin store. The liver will tend to off-load toxins into fat cells that it can't deal with at the time - possibly due to overload. If you can picture your fat cells stuffed full of all the toxins you have accumulated over your lifetime you can imagine what a struggle your body has in trying to get rid of them.

We spend years putting it in faster than the body can get it out - it was never designed to have to deal with not only the quantity, but the types, too, many of which are totally foreign substances. A lot of carbs, especially the processed ones and bad fats - trans fats, hydrogenated and heated vegetable oils, things which our modern diet is awash with are very toxic to the system.

When you lose weight the toxins are released (hence the reactions) and your liver now has to deal with them. The more weight lost, the more toxins are floating around but now there are not enough cells to take them up.

I suspect that the weight loss plateaus because the body is effectively saying 'stop - wait until I have dealt with this lot before you lose any more!'

I lost about 3 stone over the last 3 years but my body is struggling with toxin removal at the moment - my lymph glands keep coming up ('elimination' helps them go back down). It is desperately trying to off-load, and I am pretty sure that I won't be able to lose any more weight until it has dealt with them all.

I have been going through a whole gamut of issues and my health and energy levels have been going up and down like a yo-yo. I feel different every day, but I know I won't start to feel better until I have got this load of rubbish out of my system.

At the moment I am just concentrating on not having anything that is adding to the burden in any great quantity. Unfortunately, as there is no such thing in this system as 'absolutely pure' food, even within the fruit and veg range, it is not easy, but at least it is better than all the man-made rubbish that is out there.