Wild Rose (Rosa multiflora)

Rosa multiflora is a flowering shrub whose polyphenol-rich extracts, including flavonoids and phenolic acids, exert anti-inflammatory and metabolic effects primarily by inhibiting cyclooxygenase and nitric oxide synthase enzymes. Clinical research suggests its concentrated polyphenol fraction may support weight management in overweight adults at doses around 500 mg per day.

Origin & History

Wild Rose (Rosa multiflora) is a deciduous shrub native to East Asia, particularly found in China, Japan, and Korea. The plant's medicinal components are derived from its dried fruits, roots, and flowers, often using extraction methods like ethanol and water extraction.

Historical & Cultural Context

In East Asian traditional medicine, particularly Japanese Kampo and Chinese folk medicine, the dried fruits of Rosa multiflora have been used historically to treat inflammatory disorders, digestive issues, and as an anti-inflammatory remedy. These uses are supported by historical records and traditional practice.

Health Benefits

• Weight management: A 12-week RCT showed a significant reduction in body weight and BMI in overweight adults using 500 mg/day of a polyphenol fraction from Rosa multiflora [1]. 
• Anti-inflammatory effects: Preclinical studies indicate suppression of pro-inflammatory markers such as iNOS and COX-2 [3][4]. 
• UV skin protection: Animal studies showed reduced TNF-α and MMP-13 expression with supplementation [2]. 
• Allergy relief: In mouse models, extracts modulated Th1/Th2 cytokine balance, aiding in allergic rhinitis [3]. 
• Bone health: Root extracts inhibited osteoclast differentiation through RANKL pathways [6].

How It Works

Polyphenolic compounds in Rosa multiflora, including quercetin and kaempferol glycosides, downregulate the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), thereby reducing pro-inflammatory prostaglandin E2 and nitric oxide production. These flavonoids also appear to modulate NF-κB signaling, suppressing transcription of downstream inflammatory cytokines such as TNF-α and IL-6. Additionally, the polyphenol fraction may influence lipid metabolism through inhibition of pancreatic lipase activity, potentially contributing to the observed reductions in body weight.

Scientific Research

The clinical evidence for Rosa multiflora is primarily based on a single randomized, double-blind, placebo-controlled trial involving 70 overweight adults, which demonstrated weight loss benefits. No PubMed PMIDs were available for this trial, and no additional RCTs or meta-analyses were found.

Clinical Summary

A 12-week randomized controlled trial in overweight adults demonstrated statistically significant reductions in body weight and BMI following supplementation with 500 mg/day of a Rosa multiflora polyphenol fraction, though sample size details and effect magnitude require further peer review scrutiny. Preclinical in vitro and animal model studies consistently show suppression of iNOS and COX-2 expression, supporting a plausible anti-inflammatory mechanism, but these findings have not yet been replicated in large human trials. The overall evidence base is preliminary; the single RCT provides initial promise for weight management applications, yet independent replication with larger cohorts and longer follow-up is needed before firm efficacy conclusions can be drawn. No head-to-head comparative trials against established weight management interventions currently exist for this specific extract.

Nutritional Profile

Rosa multiflora (wild rose) contains a diverse array of bioactive compounds across its various plant parts (hips, petals, leaves, stems). Key constituents include: Polyphenols/Flavonoids: quercetin (50–200 mg/100g dry weight in hips), kaempferol, rutin, and hyperoside; these exhibit moderate bioavailability (~10–20% absorption) due to glycosylation requiring intestinal hydrolysis. Vitamin C (ascorbic acid): rose hips are particularly rich, ranging from 400–2000 mg/100g dry weight depending on harvest time and processing; bioavailability is generally high (~70–90%) but degrades rapidly with heat. Carotenoids: β-carotene (2–10 mg/100g), lycopene, and rubixanthin present in hips; fat-soluble with bioavailability enhanced by co-ingestion with dietary fats (~5–30% absorption). Tannins (ellagitannins, gallotannins): 3–10% dry weight in leaves and bark; relatively low systemic bioavailability but exert significant local gut effects. Triterpenoids: ursolic acid and oleanolic acid (~0.5–2% dry weight in leaves); absorbed via passive diffusion with limited oral bioavailability (~5–10%). Organic acids: malic acid, citric acid, and tartaric acid contribute to antioxidant synergy. Essential fatty acids: rose hip seed oil contains linoleic acid (omega-6, ~35–45%) and α-linolenic acid (omega-3, ~20–30%). Vitamins: vitamin E (tocopherols, ~25–50 mg/100g in seeds), vitamin K (~10–30 µg/100g). Macronutrients (hips, dry): carbohydrates ~60–70%, protein ~4–6%, fat ~2–6%, fiber ~20–25%. Bioavailability of polyphenols is notably enhanced by the food matrix and gut microbiota metabolism, producing bioactive phenolic metabolites systemically.

Preparation & Dosage

The clinically studied dosage for the Rosa multiflora polyphenol fraction (RoseFit) is 500 mg per day in capsule form, taken over 12 weeks. Preclinical studies varied in concentrations. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Green Tea, Turmeric, Ginger, Ginseng, Ashwagandha

Safety & Interactions

Rosa multiflora extracts are generally considered well-tolerated at studied doses around 500 mg/day, with no severe adverse events reported in the available RCT, though comprehensive safety profiling across diverse populations remains limited. Because the polyphenols may inhibit pancreatic lipase and modulate lipid absorption, caution is warranted in individuals taking lipase-dependent medications or fat-soluble vitamin supplements, as absorption could theoretically be affected. Flavonoid constituents such as quercetin have known potential to inhibit CYP3A4 and P-glycoprotein at higher concentrations, suggesting possible interactions with drugs metabolized by these pathways, including certain statins, immunosuppressants, and anticoagulants. Safety data in pregnant or breastfeeding women is absent, and use during pregnancy should be avoided until adequate studies are conducted.