So my DH has always had a horrible immune system. When DD1 started daycare he was practically sick the whole first year. She got a sniffle and he would get a full blown cold. Now DD2 started daycare right after Thanksgiving. He's literally had maybe 10 healthy days since Thanksgiving! He was always very very sick as a kid so it's no suprise his immunity is so weak.

Anyway, what are some natural ways we can boost his immunity? He needs to get better about taking his multivitamins. He's on a couple other pills already for health reasons so I know he doesn't want to really add more pills but if you can lead me to research that shows it works I'll try to convince him.

We already eat really healthy but can definitely improve even more on that front. He exercises when he can; when he's not sick! He's seriously one of the healthiest person I know and it sucks that he's sick so much.

Any other tips?