Hermetica Superfood Encyclopedia
The Short Answer
Salvianolic acid A is a potent water-soluble phenolic acid derived from Salvia miltiorrhiza (Dan Shen) that exerts cardioprotective and anti-inflammatory effects primarily by scavenging reactive oxygen species and inhibiting lipid peroxidation. Its key mechanisms involve modulation of NF-κB signaling, suppression of matrix metalloproteinases (MMPs), and regulation of NLRP3 inflammasome-driven pyroptosis in vascular endothelial cells.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordsalvianolic acid A benefits
Synergy Pairings5
Salvianolic acid A — botanical close-up
Health Benefits
Origin & History
Natural habitat
Salvianolic acid A is a polyphenolic acid compound extracted from Salvia miltiorrhiza (danshen), a traditional medicinal plant. It is formed by a molecule of danshensu combined with a dimer of caffeic acid, and represents one of the most abundant salvianolic acids among the more than 10 distinct forms identified in this plant.
“The research dossier does not provide specific information about the historical use of salvianolic acid A in traditional medicine systems. While it is derived from Salvia miltiorrhiza (danshen), a plant used in traditional medicine, the historical context and traditional applications of this specific compound are not detailed in the available sources.”Traditional Medicine
Scientific Research
The provided research dossier does not contain specific human clinical trials, randomized controlled trials, or meta-analyses with PubMed PMIDs. The compound has been investigated for cardioprotective and chemopreventative properties, but detailed trial data and clinical outcomes from human studies are not available in the current research.
Preparation & Dosage
Traditional preparation
No clinically studied dosage ranges for salvianolic acid A are provided in the available research. The compound exists in various forms within Salvia miltiorrhiza extracts, but standardization protocols and therapeutic doses have not been established in the provided sources. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Salvianolic acid A is a pure isolated polyphenolic compound (not a whole food), therefore it has no meaningful macronutrient, fiber, or conventional micronutrient profile. It is a single bioactive small molecule with molecular formula C26H22O10 and molecular weight of 494.44 g/mol. Structurally, it is a caffeic acid oligomer (a depside) consisting of one danshensu unit esterified with two caffeic acid moieties, making it one of the most potent antioxidant constituents isolated from Salvia miltiorrhiza (Danshen root). Bioactive compound identity: Salvianolic acid A is itself the bioactive compound of interest, present in Danshen root at concentrations typically ranging from 0.01% to 0.1% dry weight (lower abundance than salvianolic acid B, which dominates at 1–3% dry weight). As an isolated compound, it contains no vitamins, dietary minerals, or protein. Antioxidant potency: Demonstrates exceptionally high radical-scavenging capacity, reported to be significantly stronger than salvianolic acid B and tanshinones on a molar basis in DPPH and ABTS assays. Bioavailability: Oral bioavailability is considered low-to-moderate due to poor intestinal permeability and susceptibility to first-pass metabolism; studies in rodents indicate rapid plasma clearance with Tmax of approximately 15–30 minutes post-oral administration and Cmax in the nanomolar-to-low micromolar range at standard doses. Stability is pH-dependent and reduced under alkaline conditions or prolonged heat exposure. No caloric value, fat, carbohydrate, or protein content is applicable at therapeutic doses used in research (typically 1–20 mg/kg in preclinical models).
How It Works
Mechanism of Action
Salvianolic acid A inhibits lipid peroxidation by scavenging hydroxyl radicals and superoxide anions, directly protecting cardiac membrane integrity. It suppresses the NF-κB signaling pathway, reducing downstream transcription of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6, while also inhibiting MMP-2 and MMP-9 activity to prevent extracellular matrix degradation. Additionally, it modulates the NLRP3 inflammasome and downstream caspase-1 cleavage, thereby attenuating pyroptotic cell death in vascular endothelial cells and preserving endothelial barrier function.
Clinical Evidence
The majority of evidence supporting salvianolic acid A comes from in vitro cell-based assays and rodent models of myocardial ischemia-reperfusion injury, where doses of 10–50 mg/kg have demonstrated significant reductions in infarct size and oxidative stress markers such as MDA and SOD levels. Several preclinical studies in rat models of atherosclerosis have shown dose-dependent reductions in plaque formation and MMP activity. Human clinical trials specifically isolating salvianolic acid A are largely absent from the published literature; most human data involve standardized Dan Shen extracts containing multiple salvianolic acids collectively. The overall evidence base is considered preliminary, and efficacy in humans has not been independently confirmed through randomized controlled trials.
Safety & Interactions
Salvianolic acid A has not been studied in dedicated human safety trials, so a formal adverse effect profile has not been established. Because salvianolic acids from Dan Shen are known to inhibit CYP2C9 and P-glycoprotein activity, salvianolic acid A may potentiate the effects of anticoagulants such as warfarin, increasing bleeding risk. It should be used with caution alongside antiplatelet drugs (e.g., aspirin, clopidogrel) due to additive effects on platelet aggregation inhibition. Pregnant and breastfeeding women should avoid use given the absence of safety data in these populations.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
Sal ASAADanshen salvianolic acid ASalvia miltiorrhiza salvianolic acid ASM-SAA
Frequently Asked Questions
What is salvianolic acid A and where does it come from?
Salvianolic acid A is a water-soluble polyphenolic compound belonging to the phenolic acid class, isolated from the root of Salvia miltiorrhiza, commonly called Dan Shen or Red Sage. It is structurally a dimer of caffeic acid and danshensu (3,4-dihydroxyphenyllactic acid) and is considered one of the most bioactive water-soluble constituents of the plant. It is distinct from salvianolic acid B, which is present in higher concentrations in the raw herb.
How does salvianolic acid A protect the heart?
Salvianolic acid A protects cardiac tissue primarily by inhibiting lipid peroxidation and scavenging reactive oxygen species that accumulate during ischemia-reperfusion injury. In rodent models, it has been shown to reduce malondialdehyde (MDA) levels and increase superoxide dismutase (SOD) activity in damaged heart tissue at doses of 10–50 mg/kg. It also suppresses cardiomyocyte apoptosis by modulating Bcl-2/Bax ratios and inhibiting caspase-3 activation.
Does salvianolic acid A interact with blood thinners like warfarin?
Yes, salvianolic acid A carries a clinically relevant interaction risk with warfarin and other anticoagulants. Dan Shen-derived salvianolic acids inhibit CYP2C9, the primary enzyme responsible for warfarin metabolism, which can elevate warfarin plasma concentrations and significantly increase bleeding risk. Patients on anticoagulant or antiplatelet therapy should consult a healthcare provider before using any Dan Shen-derived supplement containing salvianolic acid A.
What is the difference between salvianolic acid A and salvianolic acid B?
Salvianolic acid A and salvianolic acid B are both phenolic acids from Salvia miltiorrhiza but differ in molecular structure and relative abundance. Salvianolic acid B is the most abundant water-soluble constituent of Dan Shen and has been more extensively studied in both preclinical and clinical settings. Salvianolic acid A is present in smaller quantities but demonstrates comparably potent antioxidant activity and may have distinct selectivity for certain inflammatory targets such as NLRP3 inflammasome inhibition.
Is salvianolic acid A available as a standalone supplement?
Salvianolic acid A is rarely available as a purified standalone supplement for consumers; it is most commonly consumed as part of standardized Dan Shen (Salvia miltiorrhiza) root extracts or combination traditional Chinese medicine formulations such as Danshen Dripping Pills. Standardized extracts may list total salvianolic acid content, which includes acids A, B, and others collectively. Pure salvianolic acid A is primarily used in research settings, and no established therapeutic dosage for human supplementation has been determined through clinical trials.
What does clinical research show about salvianolic acid A's effectiveness?
Most evidence for salvianolic acid A comes from laboratory and animal studies demonstrating cardiovascular benefits, but human clinical trials remain limited. Available research suggests potential benefits for heart protection and endothelial function, though larger randomized controlled trials are needed to establish efficacy and optimal dosing in people. Current evidence is considered preliminary, meaning supplementation decisions should be discussed with a healthcare provider.
Can I get salvianolic acid A from food sources, or do I need a supplement?
Salvianolic acid A is naturally found in Salvia miltiorrhiza (red sage), a traditional Chinese medicinal herb, but dietary sources alone typically provide insufficient concentrations for therapeutic effects. Most people seeking the documented cardiovascular benefits rely on standardized extracts or supplements rather than consuming the raw herb. Food-based amounts may support general wellness but do not deliver the research-backed doses used in scientific studies.
Who should avoid salvianolic acid A supplementation?
Individuals taking anticoagulants or antiplatelet medications should consult a doctor before using salvianolic acid A, as it may have mild blood-thinning properties. Pregnant and nursing women lack sufficient safety data and should avoid supplementation unless specifically recommended by their healthcare provider. People with bleeding disorders or scheduled for surgery should discuss use with their physician due to potential interaction with clotting mechanisms.
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