Have It Checked
If you know there is a family history PLEASE have genetic testing carried out.
Both my parents are carriers therefore no symptoms. One brother is also a carrier but my other brother had both hips replaced before he was 40 and has joint damage to ankles, hands and feet as well as liver damage because this condition was undiagnosed for a long time. I have exactly the same mutated genes yet have no symptoms. Its easily controlled and damage prevented IF you catch it early enough.