I use 200mg Capsules and most days take 2. You can find them everywhere. I buy mostly from iherb and pipingrock has a pretty good grape seed extract . I also like Olympian Labs grape seed extract...You can try 100mg a couple times a day to start out. If you take a blood thinner drug, can't take both. Let me know how it goes if you start with grape seed EX. Make sure you get the extract. C