I've been referred for an endoscopy as gp thinks I may have absorption issues due to low D3, low t3, failure to respond adequately to t4, problems with lactose. I know that low stomach acid may be an issue along with leaky gut. The question is will an endoscopy involving taking a sample from the gut show up these issues? Don't really want to put myself through it if it's not going to show anything. Gastro thinks it's "clutching at straws".
Any thoughts anybody please.