These days, there is a rapid increase in gout among people in their 20s and 30s. Typically, uric acid, which triggers gout, is produced by a protein called purine and is excreted through urine. Foods high in uric acid include: Animal offal: intestines, tripe, heart, liver Red meat: pork, beef, lamb Fatty fish: mackerel, saury, sardines, etc. (Beer is the worst) In the early stages, it starts with pain in the toes or the soles of the feet, and hard lumps that are hard to identify begin to be felt. (They say it comes with excruciating pain, so check for the presence of pain.) In any case, excess is harmful, and it's best to go to the hospital as soon as possible.