My grandmas hair

Dasia

My grandma and I have always done each others hair. A couple of years ago we noticed her hair started to fall out whenever we brushed it. So we switched to a comb and it seemed to help a little. She’s 60 years old with thyroid and heart problems so that might be a part of it also. She has always permed and flat ironed her for as long as I can remember. Usually when I grease her scalp it just with pink oil. I know she is becoming very self conscious with her hair and I hate to see it. How can I help her get some of the strength in her hair back? She will never stop flat ironing and perming her hair unfortunately. Her hair looks like the picture down below. Just a little more thicker