How will Hawthorn Berries Extract help me? Researchers have identified that Hawthorn Berries contain specific types of antioxidants, which protect the cells of the cardiovascular system from oxidative stress (free radical damage). The berries should be taken over a period of time for their full nutritional benefits to be realised. They contain vitamins C and B complex, crataegin, carotene and flavonoids. Extracts are rapidly assimilated by the body and can be mixed in liquid or taken directly under the tongue.