Several supplements and lifestyle changes may help improve erectile dysfunction (ED) by potentially boosting testosterone levels, but it's crucial to consult with a healthcare professional for personalized advice and treatment. Some promising options include Vitamin D, Vitamin B, fish oil, ginseng, magnesium, ashwagandha, fenugreek, and zinc. Additionally, focusing on a balanced diet, regular exercise, and stress management can positively impact both testosterone levels and overall sexual health.