>>76382100
Collagen is just amino acids.
Taking MSN and upping C intake is good, but Collagen isn't a bad protein supplement if its cheap.

>>76384756
Salt replacement such as NoSalt or Seltin is already mostly Potassium salt.
Similarly you need a source of DHA if you are taking lions mane or Urudine long term, and possibly chlonin if you are not eating enough eggs.

Multi's are also bad, for the less obvious reason that vitamins and minerals that offset D3 should not contain D3.
Nor should it contain vitamins and minerals that counter effect absorb. .