Almond Can Cause Gallstones
Oxalic acid is linked to the formation of gallstones in the body. A gallstone is a small, hard crystalline mass formed abnormally in the gallbladder or bile ducts from bile pigments, cholesterol, and calcium salts. Gallstones can cause severe pain and blockage of the bile duct, causing people to suffer immensely.
Sources:
https://www.leftistreview.com/2012/06/21/are-almonds-dangerous-to-your-health/evanlevine/