Rosa canina L. · herb
Evidence tier: moderate
High vitamin C content supports immune function and collagen synthesis
Partly characterised. The compound credited with the joint effect is a galactolipid known as GOPO, which in laboratory work reduces chemotaxis of neutrophils and inhibits inflammatory mediators, an action distinct from the fruit's vitamin C content. It is a plausible explanation, not a proven human mechanism, and the fact that rosehip products are not bioequivalent to one another means GOPO content varies between the thing that was trialled and the thing on the shelf.
Moderate for osteoarthritis pain and stiffness, and that is the only place the evidence goes. A Cochrane review of Rosa canina fruit in hip, hand and knee osteoarthritis found moderate quality evidence that it improves pain and stiffness with SMALL effect sizes, and low quality evidence of no serious adverse events, while noting that rosehip did not significantly reduce analgesic use and that generalisability is limited because different rosehip products have not been shown to be bioequivalent. The underlying meta analysis (Christensen et al., 2008, Osteoarthritis and Cartilage, PMID 18407528) pooled just three RCTs in 306 people, mean trial duration 3.3 months, at a dose of 5 g per day of standardised rosehip powder, finding a pain effect size of 0.37 (95 percent CI 0.13 to 0.60) and a number needed to treat of six. The Centre for Reviews and Dissemination appraisal of that meta analysis is blunt about its limits: given the small number of trials and participants, and data lost by using only the first phase of crossover trials, 'the authors' conclusion may not be reliable', and it notes that ALL the included trials were manufacturer sponsored and all were conducted in Scandinavia. So: a real signal, small, few trials, industry funded, one geography, one proprietary powder. The vitamin C content is a composition fact and not a health claim: rosehip is genuinely one of the richest plant sources of ascorbic acid, but no trial shows that eating rosehip improves immune outcomes, and nothing in the rosehip literature supports the immune support positioning.
Osteoarthritis trials used 5 g daily of standardised rosehip powder, taken for around 3 months. Culinary and tea use, 1 to 2 teaspoons of dried powder or 4 to 6 dried hips per 250 ml, is a food, not a trialled dose.
For immune support: 1 to 2 cups daily during cold season. Vitamin C is heat sensitive, use water at 80°C, not boiling. Strain through fine mesh to remove the tiny hairs inside the hips (they can cause GI irritation if swallowed in quantity).
Onset: ~28 days
Exceptionally safe. Very high vitamin C content may cause GI upset (diarrhoea) at concentrated doses, use standard tea amounts. High oxalic acid content: individuals with a history of kidney stones (calcium oxalate type) should moderate intake. No significant drug interactions at standard doses.
Pregnancy: safe
Breastfeeding: safe
Used in traditional European and Chilean folk medicine for skin conditions, joint pain, and as a vitamin C source. Rosa mosqueta (Chilean wild rose) has been specifically studied for its skin regenerative properties and high essential fatty acid content. Traditional use as a beauty botanical spans multiple cultures.
Active compounds: galactolipid GOPO, ascorbic acid (vitamin C), flavonoids (quercetin, rutin), carotenoids (lycopene, beta-carotene), pectin
Remedies using Rosehip · Browse by body system · Check it against what you take
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.