Why not just feed beef trachea tubes to a young, healthy dog? Worst case scenario is they get a delicious, healthy chew, and that's not wasted money! Maybe the glucosamine/chondroitin in the trachea will be in a form the body recognizes as nourishment and can do something useful with. Since you're not treating anything, dose doesn't matter, so you can just feed it in a natural food-based form. If you're going to be spending money, the dog will like it more than a pill.
OTOH, Dasuquin Advanced is top of the line in those supplements, as it's got a lot more than gluc/chon. I think even the gluc/chon Nutramax uses is supposed to be proprietary and absorbed differently than the stuff sold in human OTC supplements (it's a low molecular weight form, if I remember correctly). Unlike most pet supplements, this one is known for quality control (and having what the label says actually inside it -- which you often can't count on in pet supplements). I think we pay something like $30/bottle which lasts just under 2 months. There's also a $4 rebate that's been running a while:
https://nutramaxvet.inmarrebates.com/#/
The research on "regular" gluc/chon is pretty disappointing in people. I'm not sure that the research on Dasuquin Advanced helping dogs isn't due to the other stuff in it -- hard to say. Honestly though I think the biggest bang for the buck for treating actual arthritis in dogs is Adequan injections.
@Jax08, I'm pretty sure that Nutramax's veterinary-oriented site used to have their research out in the open to click and read, as I remember seeing them there. At some point, they must have moved it behind a log-in wall that requires a clinical credential to access now. The bibliography is still there if you dig a little for it...but the articles aren't. Harumph.
Nobody supports you like Nutramax Laboratories' commitment to helping you help your patients live the healthiest lives they can, be it pet or human.
www.nutramaxlabs.com
I wonder if the publishers of the journals got after them, since most of that stuff lives behind journal pay walls? Bummer. I like journal articles to be posted so that consumers who are science-literate can access them!