There's actually been some research conducted as to whether or not eating disorders have a genetic link.  I remember a while back reading about a genetic link to anorexia.  It's important to know though, that if you do have this genetic link (assuming it has been proven, I'm not 100% sure lol), that it isn't certain everyone in your family will have it, or your kids will have it, simply that they are more susceptible to the psychological disorder - a "genetic predisposition".

Struggling with an eating disorder yourself is extremely hard, as you know, but watching others struggle can be even harder.  Especially when it's two family members.  It's good you've recognised they aren't healthy, but the next step is to get them help.  It's harder when they know what they're doing, and actually want to do it, but you need to show them (or have someone else show them) how much they're hurting their bodies.  Things like amenorrhea (their menstrual cycle is basically screwed up, and if for long enough they may find it incredibly difficult to have children), hair loss, brain shrinkage and slowness of though, heart attacks, and even feeling extremely cold all the time.

It might be hard to sit down with them and tell them all this if they truly do not want to listen, but it is important for you to try.  Who knows what may happen, they may listen.  They may not know the horrific medical complications that come with anorexia nervosa, and only think they are losing weight and being skinny.  That is a common misconception with young people today - they think anorexia means skinny.  No, anorexia is a psychiatric illness that has with it many, many horrible illnesses to do with the body (the things mentioned above).  So I really really do suggest you try your hardest to sit down with them and talk to them.  You've been through this before, and have recovered, so see if you can get through to them.

It's also important to tell trusted family members.  Maybe your parents, or their parents, or even older siblings.  Tell them what you've seen, and how you know they're seriously sick.  I know it may suck telling adults on your younger family members - but this is their health, and you must do what is write for them.  One day when they're older and healthier, they'll look back and thank you for what you did and how you stood up and spoke.  It's not an easy thing to do, but it really is important you get some help for them.  Those adults will probably get in contact with a professional, which is a great thing.  You did say you think they both should be in hospital, so you know this is very serious.  Please talk to an adult so they can have professional help and get back on track to a healthy, normally, happy life.

It suckkkkkkks to hear you struggling with your eating disorder again but I really do hope looking at your other family members being so unhealthy will encourage you to stay on track.  If you feel like you're falling back into bad habits, you need to reach out to someone you trust.  Whether that be a friend, a family member or even a professional.  Counsellors or therapists can be scary or intimidating, but they can offer excellent advice and support to keep you on track.  You're extremely strong for pulling yourself out of that horrible black hole that is an eating disorder, and I hop you recognise how great you really are.  There are healthy and positive ways to lose weight, and they will work so much better.

Eating disorders can be really full-on sometimes, and can overwhelm you in ways that not only play on the body, but the mind too.  You're a good person for wanting to help family members when they're struggling - just make sure you get them the appropriate help.  Also, don't be afraid to ask for help yourself.  Life gets tough sometimes, and we all need a bit of help here and there.

Gooooood luck,
- Sarah.