The Joints Center website recommended Jointlax as their top choice because it Contains 16 key ingredients for optimal joint health including L-glutamic acid, Ginger, Turmeric, Holy Basil, White Willow, Glucosamine, BioPerine® and MSM.: https://jointscenter.org/products-comparison/

Flexileaf and Relief Factor have different ingredients, but both are addressing inflammation and pain sensation, and not joint support, as they do not have glucosamine, chondroitin, and MSM.

Personally, I have not used any of these supplements. But I am looking for a good supplement for joint stiffness.
Please share your experience with Flexileaf.