Doctors typically do not have much nutritional knowledge. They only get what drug salesmen give them about drugs, and in school it is not taught. Continuing Ed for them typically does not have it.

Some "professional" line supplements, target doctors. Thorne is one but there are others. There is an online one...the name eludes me, but when the person buys them, and tells the doctors' name there is a rebate for the doctor. All of these tend to be pricey.

I've had extensive experience with both drugs and supplements, so I have a different point of view...and I am not out to make money off my advice. I scan the literature and search many things out of curiosity and for my self and family and find the newest supplements, of quality etc. Right now I am trying the new Krill oil to replace my standard fish oil, and it is very nice. I've used SAMe for my osteoarthritis for over 10 yrs now... and it has kept me mobile and away from opiates.

The information about B12 is in a sticky on our PN board.
There are several Vit D threads here on Vitamin forum.
And I have Magnesium and B6, and zinc on there too. All the medical papers to support use of them for various medical problems are on those threads. It is a database I have been gathering over the years.
You are free to PM me anytime for any details and questions that come up for you.

One thing is that I have not seen really good mixtures out there for people made by these companies. I take most of my supplements as separate entities and adjust my doses of them accordingly. Some supplement places have complex mixes that are more of a shotgun approach rather than specific in approach.

It IS unusual for your doctor to suggest them, and it is always possible he has a specific point of view. I just wanted you to know, he may just be in it for the money. If the CoQ-10 and tumeric are not bio enhanced...that will tell you alot about his knowledge base! So when you get them please PM me and share the ingredients.