Hi @richardshih, I moved your post and replies to this existing discussion that you may find helpful to connect with others along with @kayabbott, like @frank0508 @lamorderd @alive and several others who have had high ferritin levels and for useful tips.

- High Ferritin Levels: How can I lower my levels https://connect.mayoclinic.org/discussion/high-ferritin-levels/

It’s important to find the cause for this however before taking supplements. There can be underlying health reasons for ferritin levels to climb so it is best to have a physician support before trying to correct this issue with supplements.

Is your father currently working with his doctor to find the cause?