I won't mention the product directly by name that I have but it's one of the popular brands here. 99% resv from japanese knotweed.
It took me a while to narrow down what was causing the symptoms because I was almost certain I was developing allergies to fish oil at first.
The symptoms are reddish/purplish patches on my face. One on my forehead and one on my check. The location is always consistent. They are not raised. They itch slightly but the itch is not worsened by scratching. The other symptom is a slightly dizzy feeling. Since I have gone off Resveratrol for several weeks, the patches have faded but are still somewhat visible. No longer reddish or purplish, just a little darker. There are currently no symptoms.
I'm assuming I'm having an allergic reaction to some component of the plant. Are there any other good sources of Resveratrol?