Rose hip is a herbal product traditionally used to treat symptoms of osteoarthritis.
The extract comes from a species of wild rose, rosa canina, sometimes known as dog rose, that is native to Europe, Africa and Asia.
The active ingredient is taken from the red fruit that ripens after the flower dies.
Some herbal products are registered with the Medicines and Healthcare products Regulatory Agency (MHRA) under the Traditional Herbal Registration (THR) scheme. However, no registration is listed for rose hip.
Rose hip extract contains polyphenols and anthocyanins that are thought to help relieve joint inflammation and reduce joint damage.
In 2008, a Danish analysis of studies into the effectiveness of rose hip extract in patients with osteoarthritis found there was some evidence that it reduced pain compared with dummy medication.
The study suggested that rosa canina hip powder was better at relieving pain than no treatment. However, experts say the study was not set up to test whether rose hip was more effective at relieving pain than current treatments.
Dosing labelling and precautions
Some mild side effects have been noted with use of rose hip, including constipation or diarrhoea, and heartburn.
Like any supplement, store them according to the manufacturer's instructions.
There is no standard dose for rose hip so follow the product instructions.