Rose hip is the fruit of the dog rose (Rosa canina). A powder made from the seeds and shells is sold as a supplement, mainly for joint pain.
Also known as: rosehip, Rosa canina, dog rose, rose hip powder.
A 3-month crossover trial used 5 g of powder a day (Winther 2005). These are study protocols, not a recommendation.
It is sold in the US as a dietary supplement. Under the 1994 dietary supplement law (DSHEA), FDA does not approve dietary supplements before they are marketed, and the maker, not FDA, is responsible for safety and labeling.
What studies show: a 2008 meta-analysis of 3 trials (287 people with osteoarthritis, median 3 months) found rose hip powder reduced pain more than placebo, with a small-to-moderate effect size of 0.37; about 1 in 6 people treated responded who would not have on placebo. All 3 trials were supported by the maker (Hyben-Vital International), and the authors called for an independent, larger, longer trial (Christensen 2008). In one of those trials, 94 people with hip or knee osteoarthritis had less pain after 3 weeks and used less rescue pain medicine; stiffness and disability improved by 3 months (Winther 2005).
Safety: the sources here do not report safety problems, and the meta-analysis says safety still needs evaluation. The sources here do not describe drug interactions.
We could not find a single published half-life or time to peak for rose hip that applies to a supplement dose, so we do not list one. Plant extracts are mixtures of many compounds, so no single figure would describe them.
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