Super food is a very cleansing food. greens do clean the system out a lot.
Eczema can be the result of skin allergy to products, immune system dysfunction on a minor level, or the skin trying to get rid of toxins. if you sweat a bit on that chest area then that will make it worse.
You state that eczema is spreading to your face. Superfood maybe trying to get rid of toxins or you have used your tioletries for a long time and now your skin is saying it has had enough of these products.
Best to use non petroleum products to minimise skin exposure to chemicals and lesson reactions.
Hope this helps
Tiggs