I share your sense of Dr Doug. Listen to his videos, they are interesting and valuable, but don't buy anything.
There are several who prey upon a vulnerable group (those of us with osteoporosis) who are fairly underserved in the medical world. Our specialists have other specialities like diabetes, but the endocrinology niche has so many diseases to attend to. Our doctors are informed by and siphoned off by pharmaceutical companies. Side effects are summarily dismissed (after all, we are mostly women). It can be genuinely wonderful to have someone who takes an hour to listen.
Listen to why he doesn't accept medical insurance, and laugh.
He does, though, order bone markers and is investigating their use. He is thinking that the anabolics should be the start medication.
And he is nice looking, though the bathtub photo is a little over the top.
https://www.youtube.com/channel/UCwdGGy-YA3p28mYbfh19xqA/videos