oyster/clam shell

Hello. I'm interested in seeing if anyone has any experience with oyster or clam shell as a supplement. Trying to see if it would help me with an overactive mind, anger, and sexual overindulgence. Paul Pitchford's book Healing With Whole Foods indicated it might. I would just try it but I've also read on the internet that it can cause Dyspepsia if taken for too long or if too much is taken, and I was trying to figure out why that would be since it is supposedly alkalinizing, however if it's alkalinizing in the way a tums is and not say in the way lemon juice is then I can see why it would maybe destroy your stomach acid over time.