You can use fish oil as your Natural Remedies for Seborrheic Keratosis. Also, you can use a krill oil supplement. Both home remedies can help you to rid of the toxic rancid fat as well as from preventing it to accumulate in the body.
https://www.naturalherbsclinic.com/blog/natural-remedies-for-seborrheic-keratosis-to-get-rid-of-it/