There is a different banner in other pages (like categories), maybe you forgot to change them with yours (mainpage). From SEO point of view it looks complete. There is a "�" sign in your about section at right after the word "queries". ("Your search for weight loss tips and other health related queries� ...") You may try some other themes too, maybe more graphics could make it more attractive. Good luck.
your site is nice, here are some recommendation, use some nice fonts and increase the font size place the banner in middle,