While joint pain is commonly associated with aging, it can also indicate a deficiency in potassium in your diet. Potassium plays a critical role in preventing the loss of calcium from your bones, and a deficiency can result in soreness and discomfort in your joints. Ensuring you consume enough potassium-rich foods like bananas, sweet potatoes, and spinach may help alleviate some of this pain and promote better joint health. Instead of dismissing achy joints, consider if boosting your potassium intake could be beneficial.