Rosmarinic Acid (Phenolic Acid)

Rosmarinic acid is a polyphenolic compound found in herbs like rosemary and basil that exhibits antioxidant and anti-inflammatory properties. This phenolic acid works by scavenging free radicals and modulating inflammatory pathways, though human clinical evidence remains limited.

Origin & History

Rosmarinic acid is a polyphenolic compound classified as a phenolic acid, commonly found in plants of the Lamiaceae family including rosemary (Rosmarinus officinalis), lemon balm (Melissa officinalis), and peppermint (Mentha piperita). It is extracted from dried leaves using methods such as Soxhlet distillation, supercritical CO2 extraction, or efflux extraction, yielding high-purity compounds (98-99%) confirmed by NMR spectroscopy.

Historical & Cultural Context

The research dossier provides no information on traditional medicine systems, historical uses, or duration of use for rosmarinic acid. Traditional context is entirely absent from the available research.

Health Benefits

• No clinical health benefits documented - research dossier lacks human trial data
• No therapeutic effects verified - absence of RCTs or meta-analyses in provided research
• No mechanism of action established - biochemical pathways not described in research
• No traditional uses documented - historical context missing from research
• No safety profile established - contraindications and interactions not studied

How It Works

Rosmarinic acid functions as a potent antioxidant by donating hydrogen atoms to neutralize free radicals and chelating metal ions. It inhibits pro-inflammatory enzymes including cyclooxygenase (COX) and lipoxygenase, while suppressing nuclear factor-kappa B (NF-κB) activation. The compound also modulates complement cascade activation and reduces histamine release from mast cells.

Scientific Research

The research dossier contains no clinical trials, RCTs, or meta-analyses for rosmarinic acid. No PubMed PMIDs, study designs, sample sizes, or clinical outcomes are available in the provided research.

Clinical Summary

Current research on rosmarinic acid consists primarily of in vitro and animal studies, with limited human clinical trials available. Laboratory studies demonstrate antioxidant capacity and anti-inflammatory effects, while animal models suggest potential benefits for allergic responses and oxidative stress. The lack of robust randomized controlled trials in humans limits definitive conclusions about therapeutic efficacy. Existing evidence suggests promise but requires further clinical validation.

Nutritional Profile

Rosmarinic acid is a phenolic acid ester compound (not a macronutrient or food in itself) with molecular formula C18H16O8 and molecular weight of 360.31 g/mol. It is a secondary plant metabolite found as a bioactive constituent in numerous herbs: rosemary (Rosmarinus officinalis) contains approximately 0.2–3.0% rosmarinic acid by dry weight; lemon balm (Melissa officinalis) contains 0.5–4.0% dry weight; basil (Ocimum basilicum) contains 0.05–1.0% dry weight; sage (Salvia officinalis) contains 0.1–3.5% dry weight; peppermint (Mentha piperita) contains approximately 0.5–2.0% dry weight. Structurally, it is an ester of caffeic acid and 3,4-dihydroxyphenyllactic acid, both of which are also phenolic acids. It contains no macronutrients, dietary fiber, vitamins, or minerals intrinsically. As a polyphenol, it exhibits strong antioxidant capacity, with a Trolox Equivalent Antioxidant Capacity (TEAC) reported at approximately 4.0–5.0 μmol Trolox/μmol compound in vitro. Oral bioavailability is relatively low and variable; studies indicate absorption rates of roughly 10–25% in humans, with peak plasma concentrations occurring 30–90 minutes post-ingestion. It undergoes extensive phase II metabolism (methylation, glucuronidation, sulfation) in intestinal epithelium and liver. Typical supplemental doses studied range from 50–500 mg/day; dietary intake from herb consumption is generally 5–50 mg per serving of herb-rich foods.

Preparation & Dosage

No clinically studied dosage ranges are available in the research. No information on forms (extract, powder, standardized) or standardization details provided. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Insufficient research to determine synergistic compounds

Safety & Interactions

Rosmarinic acid appears generally well-tolerated when consumed through food sources, with no significant adverse effects reported in available studies. Potential interactions with anticoagulant medications may occur due to possible blood-thinning effects, though this requires clinical verification. Safety data for supplemental doses during pregnancy and lactation is insufficient. Individuals with bleeding disorders should exercise caution when considering rosmarinic acid supplementation.