I was looking up info about herbs for a friend on the internet and one site listed flax seed was one of the 'herbs'. The site stated that you can overdose on flax seed, it has a compound with cyanide-like qualities, and it can cause respiratory arrest if you eat too much. Unfortunately, the site did not state how much was too much! I just started eating 1/4 cup of ground flax per day for breakfast this week, and now I'm concerned about overdosing if I eat 1/4 cup per day.

Has anyone else heard of this? Does anyone know how much is too much flax seed?