“Please consider taking boron until then”
Costco has a version with Boron 5mg, 110 pills for $24. In store or on-line with free shipping (at least that is what I’m seeing for So Cal.) They use Boron glycinate, no idea if that makes a difference pro or con. I went ahead and bought some today, will give two pills a day a shot for 7 weeks and see where my achy shoulder is at after that.
Swanson Triple Boron Complex (2 cents a 3 mg boron capsule):
https://smile.amazon.com/gp/aw/d/B077HYBYLK
There's a similar one from TwinLabs called Tri-Boron, but it's fairly more expensive.
Swanson Boron from Albion Boroganic Glycine is another option I've taken (8 cents per 6mg boron capsule):
https://smile.amazon.com/gp/aw/d/B07RDYNJC5
However, the calcium fructoborate is the one most OA studies used. I do believe these ones mentioned above provide a similar benefit, but if not, you could always get the calcium fructoborate (the expensive form).
One more thing: Eggshell Membrane may be a better choice than normal glucosamine/chondroitin supplements. It has those in it, but other factors that appear to help, too.