As this is a relatively new product being taken as a supplement there is still a lot of ongoing research into whether it is safe to take in every circumstance so it would be wise to take care in the following instances:-

One of the benefits of taking this product is the healthy effects it has on the heart and circulatory system. In theory the possible interaction with blood thinners should be taken into consideration. So patients receiving prescribed medications such as Warfarin (Coumarin) should advise their doctor they are taking this product.

Patients with platelet deficiencies or bleeding tendencies should be monitored by a physician while taking this product.

People undergoing surgery should discontinue this product two weeks before their operation and two weeks after to reduce the risk of bleeding.

It is advisable not to take resveratrol while pregnant or breast-feeding. Even though this is a natural product there is a lack of research in this area at the present to prove safety.