I use Sparkle Wellness with Fortibone called Osteo Boost Powder. You can buy it direct from them or on Amazon. I am using one scoop, which was supported in some studies.

I found it on line.

I get Fortibone collagen (and other items) from Osteonaturals, https://www.osteonaturals.com/shop-osteonaturlas. Unfortunately, the large container is currently out of stock; it's a significantly better value than the small container.