Ok, so (gym owner) was talking about metabolic flexibility. Here’s where he got his info:
This is a conversation between Dr. Osborne, a neurosurgeon and Keto expert, Whitney Reid, who is the National Sales Manager at BPI, and an accomplished fitness model, and James Grage.
and
The first clip is over an hour long, so I didn’t watch it all, but Dr. O apparently works for BPI. He is all over BPI’s website pushing and explaining how their products work with keto, except you have to raise the carb limit (probably to consume more BPI product).
It will be interesting to watch the clip and see if he has any studies that prove long term metabolic damage from keto. Not saying he may not have a point, but yeah, follow the money.