In 77 AD, the Romans recorded more than 30 disorders that could be treated with different roses. The fruit (hips) and the seeds from the Dog Rose are the parts of the plant used.
Rose hips are an excellent natural source of vitamin C, which can help prevent the development of colds and help to fight infections. Rose hips also have mild laxative and diuretic properties which can help treat conditions of the kidney and bladder. Due to its tissue regeneration properties, the seed oil extracted from rose hips can reduce scar tissue and stretch marks caused by pregnancy and birthing.
Resist the temptation to pick the hips off cultivated roses in parks and gardens. They reportedly have substantially less vitamin C and will potentially have been sprayed with pesticides.