The size is minimal issue. If you have smaller caps you can prevent stomach irritation by using smaller doses, spaced out more frequently.
Must take with food and never on empty stomach.
Must monitor potassium levels.
If GI irritation happens do not keep dosing. Wait until you feel better and then re start using apple cider vinegar to lower the ph. Remember this stuff is like Lye. Like drinking Drano. So adding a touch of acidic juice will take the edge off... but never take this product on empty stomach.