Hi and welcome to HCM.
It i shard to say are those 2 symptoms related. Unexplained bruise
is usually sign of clotting disorder
but it can occur without obvious reasin. Loss of apetite is probbaly something else and you should do complete gastroenterologic and endocrinologic work up because it can be sign of certain diseases. Also if you are female, hormonal
imbalance should be considered. WIsh you good health.