Comfort him, reassure him the reasons to stay. Talk about the positives of living. Do not pressure or guilt him on staying alive. Tell a trusted adult or school counselor.
Salt is good for you in small quantities because sodium, part of salt, is required to maintain your blood pressure and is important for your neurological system. However too much can be bad for you because your body will become dehydrated as salt absorbs water.
Seeing other people online that you may persevere as prettier than you or having a better body can have make you perceive yourself as ugly and not good enough.
To prevent the risk of injury from slips, trips and falls due to clutter, you should organize storage areas and secure cords and cables.
Both of the things would need to be safely maintained to prevent injuries. Storage areas would need to be kept clean and tidy so that no potential hazard is created, and this can occur if the storage area is disorganized. Cords and cables would need to be secure in order to not trip over them. They should be kept out of the way and mainly placed together in an area where it's less likely to cause an accident.