Oxalates are natural compounds plants use as a defense, but in high amounts they can harm your health. Too many oxalates are linked to kidney stones, joint pain, nutrient loss, and chronic fatigue. Foods like spinach, almonds, potatoes, soy, and dark chocolate are some of the biggest offenders. Not everyone reacts the same way, but reducing your intake or giving up the highest sources for a few weeks may bring relief. Learn which foods carry the heaviest oxalate load, smart swaps you can make, and why understanding what plants do in your body is key to protecting your health.