Help i have a question eating healthy and anger controller?

for the past few months have been eating healthy food cut all the junk food and sodas problem is i am now having anger issues and don't know why i have always been a mellow lade back guy i have noticed if i do eat candy or have a soda i comm down and easy er to live with is there some thing wrong with me also if i work out i have a short fuse what can i do about this i am a single dad and don't want my kids to see this way