I don't think it is, but your pigmentation is concerning (I don't want to offend you, I'm not trying to). I also think that everyone's bone structure is different. Once again, I hope I did not offend you at all. I apologize for being a meanie.
You aren't being mean lol. I assure you my weight is not a concern, I eat enough for two people. I simply have a high metabolism, my mom is like that as well. I have genetics to thank for that, I also have started working out. You only need 5 minutes of direct sunlight a day, I get more than that. However my lack of melanin is not cause for alarm, I am simply pale, thats all there is to it. I refuse to get a tan or stay out in the sun for long periods of time.