I was also starting to get frequent cold sores... Every couple of months and I felt terrible with them. So, I was doing some research and read on Dr. Mercola's website that if you take Red Marine Algae( with gigartina/dumontacea in the formula) that this will help prevent you from getting the cold sores. So far, so good. It's been a couple of months and no signs of an episode.
Red Marine Algae
Hi: When ever l get fever blisters l use an excellant product called: Red Marine Algae Dumontiaceae (an Antiviral Food). This always cures me, l recommend it highly. Lynette, san clemente, ca.