At your age- the knee pain
is most probably osteo arthritis- that is pain because of wearing out of the joint. When you go for your daily walk- make sure you walk on level ground only walking on uneven ground can worsen your problem. make sure you eat a high fiber diet- lots of fruits and veggies, with 2 ltrs water per day Avoid soft drinks- colas. And when you sleep- keep a gap of atleast 2 hours between eating your meals and sleeping. As you have a poor appetite
, you can take a supplement like becadexamin for 1 month- once daily after food.