There are natural ebbs and flows to weight loss. It is totally normal.
My suggestion is to not try to hack the plan. It works as it is written.
There are many reasons for the slowdown. Here are a few.
- You have less weight to lose so it'll come off slower
- Your metabolism is used to the plan and has become more efficient
- Your metabolism has slowed some, to adjust to the lower calorie intake
I notice you didn't say you've stalled, only that there has been a bit of a slowdown. A stall would be 4-6 weeks with zero losses on the scale or measuring tape. If one got to 6 weeks of zeros, it might be time to look at what changes could be done (including phasing off to give the metabolism a break from p1). However, the folks I have seen with the most success are the ones who stick with it through the highs and the lows.
Instead of finding things to tweak, perhaps find some new recipes to change things up. If you're in a rut with some veggies (I am with slaw!), perhaps use the next couple of weeks to try some new veggie recipes. Switch out meats you've been eating and try something else. Experiment with variety.
Net carbs affect ketosis but mostly it is the cals that are effecting weight loss (ketosis sure helps with the hunger tho, doesn't it).
What are you doing for exercise? Maybe it's time to change or add something there. If you're walking, maybe add yoga. Just looks for ways to change things while sticking with the plan.