I am hla b27+ and suffering from ankylosing spondylitis. I take nsaid (indocap sr) when required. My problem is I am under weight. I stay alone for my job, so taking a proper foods is difficult for me. So I am looking for some supplements which I can take daily which can help me to gain some weight. As I am suffering from ankylosing spondylitis so I cannot take processed food, diary products and the good consisting of high carb and starch. So please suggest me some good supplement that can fulfill my requirements by keeping the above things in mind. Thank you.