This brand is fantastic. These r FODMAP friendly. If u hav IBS and dont know wat FODMAP is, I suggest googling it. It changed my life. Only brand I\'ve seen that does FODMAP friendly. These cause no nausea, cramps, no stomach probs at all. I hav lactose, diary, gluten, sucrose & wheat intolerances. And I\'ve had zero probs with these. Been taking them for about 3mths. 3 to 4 tabs, AM and PM. For cold sore prevention but lysine is also great for skin & skin conditions like psoriasis which I hav on my scalp. Dermatitis on my face. These r great. When my stomach does not feel great I do reduce the dose to 2 tabs at night and 3 tabs in the morning. Just to b safe as lysine can cause some people nausea. But I hav the most sensative stomach ever and I\'ve had no problems at all.