Hello Irna, thank you for asking at HealthReplies.com.
I help explain a little.
Gout is a condition where the level of uric acid in the blood exceeds normal. The accumulation of uric acid will eventually lead to the formation of crystal stones, these crystal stones will usually accumulate in the joints, generally in the joints of the toes. As a result of this buildup will cause swelling, pain in the joints when moved.
In addition to the joints of the fingers, this buildup of uric acid can also occur in the kidneys and urinary tract, so that later it will disrupt the function of the kidneys and urination. To diagnose gout, blood tests are usually done, from the blood test later it can be seen whether the level of uric acid checked is normal or high.
As stated in the article that you are asking, spinach and beans have purines but are not many and are safe for consumption. However, maybe in some people, it will be able to affect the levels of uric acid in the body even if consumed in small amounts, it is because each person's body condition is different. If you have gout, and doubt about it, it should be avoided, many types of vegetables that can be consumed besides spinach such as tomatoes, broccoli.
Hopefully can help.