You should read the Vitamins sticky at the top. B-12, D3, magnesium w calcium, a B-50 Complex or other source of folate and the rest of the B vitamins such as a multivitamin for stress and a good dose of anti-oxidants, C, E, should be your minimum.

You can strengthen your immune system and maybe help with your asthma.

Most anti-inflammatory diets are also good at helping strengthen the immune system.