What is a good multivitamin for men to take to boost their immune system?

None needed: There is no way to "boost" your immune system, although a lot of people who sell a lot of different supplements will tell your wallet otherwise. Simply eat a good, balanced diet, and consider supplementing with any brand of multivitamin, and you will be providing your immune system with all the tools it needs to do its job.

No magic pill: Many people are looking for some "magic pill" to "boost their immune system". There is no such pill. However, there is a way to boost your immune system, live a healthy lifestyle. Proper diet, proper sleep- wake cycles, healthy environment, proper exercise are the foundation of good health and good immune health. Supplements should be used selectively to supplement a healthy diet.