Really good answer. Somehow your use name did not come through. You must be stealth.
One point though regarding "I understand MSM on its own can be taken in huge quantities without any side affects as it is easily dissolved and I guess expelled by the body and has no toxicity." If I take only 1000mg daily, my hemorrhoids and that part of the colon will bleed. Scary. Kind of like aspirin; which I no longer take. It must be blood thinning. That kind of sulfur is good for you. Instead, I take black strap molasses -- better tasting too. For the lucky others, I believe MSM has a long list of benefits.