I also agree with Vitamin D. I take 4,000 iu's of D3 a day. I live in California and even in the winter I wear a t-shirt and shorts so I get adequate sun everyday on top of my vitamin D supplements. Also, make sure you and your husband is getting your 8+ hours of sleep every night which I know can be challenging with kids. On this regimen I haven't been sick in over a year.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.