On a moms thread where most of the ladies are over 35 and have had many pregnancies, the question of metabolism came up, along the lines of “why don’t the extreme diets work anymore now that I’m older?”
And the most likely explanation is that the extreme diets after baby #3 took a nutritional toll and led to long term slowing of thyroid function even if it led to significant weight loss in the short term.
Cutting carbs too hard (and “too hard” depends on the person and activity level) tends to slow thyroid function because insulin contributes to thyroid signals. It’s a signal of energy surplus, and your body will not optimize your thyroid when energy supply is too low.
There are a number of different ways to find your sweet spot of carbs and optimize metabolism, and I would be happy to walk you through figuring out which 2-3 things will be the simplest and most impactful for you.
Every few years I add a few new things, whether a new supplement, food, stretching, circadian rhythm, or another approach I’ve learned. And because of this, without anything extreme, I can wear the same clothes I bought after my 2nd baby.
I’m not usually using the level of focus and effort to be my very thinnest fittest self, but I can stay in the normal range with little effort.
Here’s a Google doc overview I made for a friend my age. Notice there’s nothing like Whole 30 or 75 Hard or Code Red here. I’ve coached too many ladies who hit the wall with these programs.