Any information I can print for him to read would be appreciated. He is 53 years old. What else did his doctor say about your husband's headaches. Headaches are serious and bothersome to people who have them. First his doctor should rule out any physical cause.
Some headaches require prescribed drugs to control.
I would encourage your husband to seek assistance in determining the cause including considering stress or anxiety and be receptive to treatment. Headaches can be aggravated by sex hormones as some women get headaches when they menstruate. This same problem is not demonstrated in men however. Actually caffeine can improve some people's headaches and yet worsen others. While SnackWell products, skim milk, bananas and other fruit are low fat, any diet that includes few foods is not healthy.