We are your Joint Health Experts.

KaufmanLet Doug Kaufmann from Know the Cause fill you in on the amazing effects of our joint supplements.

Flexcin Starter Pack



First Time Customers Save


Reg Price
Now $40 OFF

Ready to Start?

Try a 90 day supply of Flexcin


If you’re not satisfied return the empty bottles for a

full refund, less shipping and handling.


NO MORE KNEE PAIN FOR THIS ROLLER DERBY QUEEN... I play roller derby and I hurt my knee. I lost complete range of motion. I noticed twinges and pains in my knees and hips that I just thought I had to deal with but now they’re completely gone with Flexcin. After about three weeks or so I really got a lot of my range of motion back and after six weeks I could completely squat down with no pain at all.

Choose one of our Joint Supplements