Cynorhodon Vitamine C (Rosa canina): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does rosehip work to reduce arthritis inflammation?

Rosehip contains a unique galactolipid fraction called GOPO (glycoside of mono- and diglycerol), which appears to inhibit white blood cell migration into joints and reduce inflammatory markers. This mechanism differs from conventional NSAIDs and does not directly inhibit COX enzymes. Evidence level C studies suggest this galactolipid fraction, rather than vitamin C alone, is primarily responsible for the observed benefits in osteoarthritis pain reduction.

Does rosehip interact with iron supplements or medications?

Rosehip significantly enhances iron absorption due to its high vitamin C content, which can cause excessive iron levels in people taking iron supplements or those with iron overload conditions like hemochromatosis. This interaction is well-documented. Additionally, rosehip may theoretically potentiate anticoagulant effects due to mild anticoagulant properties, though clinical evidence remains limited. Patients on blood thinners or iron therapy should consult a healthcare provider before use.

What is the recommended daily dosage of rosehip for arthritis?

For osteoarthritis support, clinical studies have typically used standardized rosehip extracts at 250-500mg daily, specifically standardized to the galactolipid fraction. Traditional use as a vitamin C source suggests 2-5 grams of dried rosehips prepared as tea daily. Start with lower doses to assess gastrointestinal tolerance, as larger amounts may cause mild digestive upset. Evidence level C.

Is rosehip safe to take during pregnancy and breastfeeding?

Rosehip is generally considered safe during pregnancy and breastfeeding when consumed in food amounts or as tea. The fruit has an extensive history of traditional use without reported adverse effects in these populations. However, concentrated therapeutic extracts have not been rigorously studied in pregnant women, so healthcare provider consultation is recommended before using standardized extracts. Food-grade rosehip preparations are typically regarded as safe.

How much vitamin C is in rosehip compared to oranges?

Rosehips contain approximately 20 times more vitamin C than oranges by weight, making them one of nature's richest plant sources of ascorbic acid. The vitamin C in rosehips occurs naturally alongside synergistic bioflavonoids, carotenoids, and pectin, which may enhance absorption and bioavailability compared to isolated synthetic vitamin C. This whole-food matrix explains rosehip's traditional use for preventing scurvy among sailors and supporting winter immune health.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Rosehip (Rosa canina) is a plant source rich in bioactive compounds, particularly ascorbic acid, with demonstrated antioxidant and anti-inflammatory properties [PMID:35335334, PMID:31138475].

Contexte

Rosa canina is a perennial shrub producing reddish pseudo-fruits used across the pharmaceutical, cosmetic, and food industries [PMID:37605366, PMID:38332573].

Usages traditionnels

Rose hips have been traditionally used to treat kidney stones, gastroenteric ailments, hypertension, and respiratory problems such as cough, cold, and bronchitis [PMID:30317989]. They have also been used in folk medicine for various types of arthritis, including rheumatoid and osteoarthritis [PMID:27816506].

Composés actifs

Major active components include ascorbic acid (Vitamin C), flavonoids (such as quercetin, rutin, and kaempferol), tannins, anthocyanins, phenolic acids (notably ellagic acid), carotenoids (lycopene, beta-carotene, lutein), and organic acids (citric, malic, tartaric) [PMID:35897912, PMID:34829066, PMID:22083314, PMID:38684952, PMID:38999097].

Mécanisme d'action

Anti-inflammatory effects are mediated by inhibiting NF-κB signaling and pro-inflammatory enzymes (e.g., COX-2, MMPs), decreasing inflammatory cytokine and chemokine production (TNF-α, IL-1β, IL-6), and lowering C-reactive protein levels [PMID:34348637, PMID:27816506]. It also exerts potent antioxidant radical scavenging effects [PMID:31138475]. In rodent models, it may antagonize PPAR gamma activity to exert antiobesity effects [PMID:38332573].

Preuves cliniques

Preuve AOsteoarthritis

A meta-analysis of three RCTs showed that Rosa canina powder reduced pain scores compared to placebo [PMID:18407528].

Preuve ACardiovascular and Metabolic Health

A systematic review of RCTs indicated mixed effects on LDL-C and blood glucose levels, with some studies showing significant benefits [PMID:38283449].

Preuve DHair Growth

Topical application of rosehip seed oil in C57BL/6 mice stimulated hair growth by inducing the transition of follicles from telogen to anagen phase [PMID:38188083].

Preuve DObesity and Diabetes

In high-fat diet-fed mice, R. canina flesh reduced body-weight gain and improved hyperglycemia and insulin resistance [PMID:38332573]. In spontaneously diabetic Torii rats, hot-water extract improved glucose tolerance and preserved pancreatic beta-cell function [PMID:28182280].

Sécurité et effets indésirables

An expert panel concluded that 12 Rosa canina-derived ingredients are safe for use in cosmetics when formulated to be non-irritating and non-sensitizing [PMID:35531605].

Synthèse des preuves

Evidence for pain reduction in osteoarthritis is supported by a meta-analysis of RCTs, though some reviews note a scarcity of high-quality studies for other applications like scar treatment. Much of the metabolic and hair-growth evidence is currently limited to animal models.

Sources PubMed

1.PMID: 37605366 (2024) — Rosehip extract and wound healing: A review. · Journal of cosmetic dermatology
2.PMID: 35897912 (2022) — Bioactive Compounds in Rosehip (Rosa canina) Powder with Encapsulating Agents. · Molecules (Basel, Switzerland)
3.PMID: 18407528 (2008) — Does the hip powder of Rosa canina (rosehip) reduce pain in osteoarthritis patients?--a meta-analysis of randomized controlled trials. · Osteoarthritis and cartilage
4.PMID: 36838668 (2023) — Juice Powders from Rosehip (Rosa canina L.): Physical, Chemical, and Antiglycation Properties. · Molecules (Basel, Switzerland)
5.PMID: 38188083 (2023) — Hair Growth-Promoting Effects of Rosehip (Rosa canina L.) Seed Oil in C57BL/6 Mice. · Preventive nutrition and food science

Cynorhodon Vitamine C

Sources et citations

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