I have taken glucosamine-chondroitin for about 10 years and it has seemed to help/eliminate knee pain after exercise. I have also developed high blood pressure. Someone told me that g-c can raise bp, and that a sulfate form is better. My BMI is normal, I minimize salt, and exercise moderately; am increasing exercise at this time. Should I switch to a sulfate form, or discontinue altogether? I want to protect my knee joints as much as possible. (I don't run anymore, just walking.)