# Carthamus tinctorius

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/carthamus-tinctorius
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-02
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Safflower, Honghua, Kafesheh, False saffron, American saffron, Bastard saffron, Dyer's saffron, Safflower petals, Carthami flos, Red flower

## Overview

Carthamus tinctorius, commonly known as safflower, contains key bioactive flavonoids including hydroxysafflor yellow A (HSYA) and carthamin, which exert antioxidant and [neuroprotective effect](/ingredients/condition/cognitive)s primarily by scavenging [reactive oxygen species](/ingredients/condition/antioxidant) and inhibiting glutamate-induced excitotoxicity. It holds an EMA monograph status and has been studied in preliminary animal models for cerebral protection and osteoblast defense against oxidative damage.

## Health Benefits

• [Neuroprotective effect](/ingredients/condition/cognitive)s: Water extracts inhibited glutamate-induced cell death in rat C6 glia cells and reduced oxidative markers in rat cerebrum (preliminary evidence from animal studies)
• [Antioxidant protection](/ingredients/condition/antioxidant): Demonstrated protection in osteoblasts by reducing malondialdehyde and other oxidative stress markers (in vitro evidence only)
• [Bone health](/ingredients/condition/bone-health) support: Hydroxysafflor yellow A inhibits bone resorption by reducing cyclooxygenase-2 and prostaglandin E2 (preliminary in vitro evidence)
• [Cardiovascular](/ingredients/condition/heart-health) support: Traditional use for cardiovascular conditions with anticoagulant and vasodilatory properties (traditional evidence only, no human clinical trials)
• [Anti-inflammatory](/ingredients/condition/inflammation) effects: Linked to water extracts through reduction of inflammatory markers (preliminary animal evidence)

## Mechanism of Action

Hydroxysafflor yellow A (HSYA), the primary chalcone glycoside in Carthamus tinctorius, inhibits glutamate-induced excitotoxicity by reducing intracellular calcium overload and suppressing [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) accumulation in glial cells. Carthamin and HSYA also downregulate lipid peroxidation markers including malondialdehyde (MDA) by activating the Nrf2/HO-1 antioxidant pathway, increasing superoxide dismutase (SOD) activity. Additionally, HSYA modulates the NF-κB signaling cascade, dampening [pro-inflammatory cytokine](/ingredients/condition/inflammation) release in neuronal and bone cell models.

## Clinical Summary

Most available evidence for Carthamus tinctorius derives from in vitro and rodent studies rather than robust human clinical trials. Animal studies demonstrated that water extracts of safflower reduced glutamate-induced cell death in rat C6 glia cells and lowered oxidative markers such as MDA in rat cerebrum tissue, though sample sizes and standardization vary across studies. In osteoblast models, safflower extracts showed measurable reductions in [oxidative stress](/ingredients/condition/antioxidant) biomarkers, but no large-scale randomized controlled trials in humans have yet confirmed these effects. The overall evidence base remains preliminary, and the EMA monograph reflects traditional use rather than established clinical efficacy at specific dosages.

## Nutritional Profile

Carthamus tinctorius (safflower) contains the following nutritionally and biochemically relevant components: **Fatty acids (seed oil):** Linoleic acid (omega-6) dominates at 68–83% of total fatty acids in high-linoleic varieties; oleic acid (omega-9) ranges from 75–80% in high-oleic varieties; palmitic acid ~6–7%; stearic acid ~2–3%. **Protein (seeds/meal):** Crude protein content in defatted safflower meal ranges from 40–50% by dry weight, containing essential amino acids including lysine (~3.2 g/100g protein), methionine (~2.1 g/100g protein), and arginine (~8.5 g/100g protein). **Bioactive flavonoids and pigments:** Hydroxysafflor yellow A (HSYA) is the predominant water-soluble chalcone glycoside in florets, typically present at 1–3% of dried floret weight; safflower yellow A and B (carthamin precursors) also present; carthamin (red pigment) forms upon enzymatic oxidation. **Tocopherols (seed oil):** Alpha-tocopherol at approximately 34–39 mg/100g oil; gamma-tocopherol at ~1–2 mg/100g oil. **Phytosterols:** Beta-sitosterol (~150–200 mg/100g oil), campesterol (~30–50 mg/100g oil). **Minerals (seeds):** Potassium ~690 mg/100g, phosphorus ~644 mg/100g, magnesium ~130 mg/100g, calcium ~60 mg/100g, iron ~6.4 mg/100g. **Fiber:** Total dietary fiber in seed meal approximately 35–40% dry weight, predominantly insoluble. **Bioavailability notes:** HSYA has limited oral bioavailability due to poor intestinal absorption; fatty acid bioavailability from oil is high (>90%); tocopherol absorption is fat-dependent and estimated at 20–40% under normal dietary conditions.

## Dosage & Preparation

No clinically studied human dosage ranges are established for Carthamus tinctorius extracts or standardized forms. Animal studies used 0.2-2 mg/kg/day but these cannot be translated to human recommendations. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Carthamus tinctorius is generally considered well-tolerated at traditional doses, but high doses of safflower oil or extracts may exert anticoagulant effects by inhibiting platelet aggregation, raising concern for interactions with anticoagulant or antiplatelet drugs such as warfarin or aspirin. Individuals with known allergies to Asteraceae/Compositae family plants (including ragweed, chrysanthemums, and daisies) are at increased risk of hypersensitivity reactions. Use during pregnancy is contraindicated, as safflower has historically been associated with uterotonic activity and potential to stimulate uterine contractions. No well-documented herb-drug interaction studies exist in humans, so caution is advised when combining with [blood pressure](/ingredients/condition/heart-health) medications or hormonal therapies.

## Scientific Research

The research dossier reveals no human clinical trials, RCTs, or meta-analyses for Carthamus tinctorius have been conducted. Available evidence consists entirely of preclinical studies including in vitro experiments and animal models, with no PubMed PMIDs for human trials provided.

## Historical & Cultural Context

Carthamus tinctorius flowers have been used for centuries in Traditional Persian (Kafesheh), Chinese (Honghua), and folk medicine for [cardiovascular](/ingredients/condition/heart-health) diseases, cerebrovascular issues, menstrual problems, and trauma-related pain. The Chinese Pharmacopoeia lists it for cerebral and cardiovascular conditions, with water extracts traditionally applied as anticoagulants and antihypertensives.

## Synergistic Combinations

Ginkgo biloba, Rhodiola rosea, Curcuma longa, Green tea extract, Resveratrol

## Frequently Asked Questions

### What is hydroxysafflor yellow A and what does it do?

Hydroxysafflor yellow A (HSYA) is the primary bioactive chalcone glycoside isolated from Carthamus tinctorius flowers. It acts as a potent antioxidant by scavenging reactive oxygen species and has demonstrated neuroprotective activity in rat C6 glia cell models by blocking glutamate-induced excitotoxic cell death. It also activates the Nrf2/HO-1 signaling pathway to upregulate endogenous antioxidant enzymes like superoxide dismutase.

### Is safflower extract safe to take with blood thinners?

Safflower extracts, particularly at high doses, may inhibit platelet aggregation and enhance anticoagulant activity, which poses a significant interaction risk with drugs like warfarin, clopidogrel, or aspirin. This could increase bleeding risk, especially perioperatively or in individuals with clotting disorders. Patients on anticoagulant therapy should consult a healthcare provider before using Carthamus tinctorius supplements.

### Can pregnant women take Carthamus tinctorius supplements?

Carthamus tinctorius is generally contraindicated during pregnancy because safflower has a historical record of uterotonic activity, meaning it may stimulate uterine contractions and potentially increase the risk of miscarriage or preterm labor. The EMA monograph does not support its use during pregnancy or breastfeeding due to insufficient safety data. Pregnant women should avoid safflower extract supplements entirely.

### What does the EMA monograph say about Carthamus tinctorius?

The European Medicines Agency (EMA) monograph for Carthamus tinctorius recognizes its traditional herbal use rather than clinically established therapeutic efficacy, meaning approval is based on documented historical use over at least 30 years rather than controlled clinical trial data. The monograph covers specific preparations and dosage forms, primarily for traditional indications. It does not authorize specific health claims related to neuroprotection or antioxidant therapy pending further clinical evidence.

### What are the antioxidant compounds in safflower and how do they protect cells?

Safflower flowers contain several antioxidant compounds including hydroxysafflor yellow A (HSYA), safflor yellow B, and carthamin (a red quinochalcone pigment). These compounds reduce lipid peroxidation by lowering malondialdehyde (MDA) levels and boosting superoxide dismutase (SOD) and catalase activity in cell models. In osteoblast studies, these flavonoids protected bone cells from hydrogen peroxide-induced oxidative damage by activating the Nrf2 antioxidant response element pathway.

### What does research show about Carthamus tinctorius and brain health?

Animal studies demonstrate that water extracts of Carthamus tinctorius (safflower) have neuroprotective properties, inhibiting glutamate-induced cell death in rat glial cells and reducing oxidative stress markers in the cerebrum. However, these findings are preliminary and from in vitro and animal models; human clinical trials are needed to confirm whether safflower supplements provide similar neuroprotective benefits. Current evidence suggests potential promise, but efficacy in humans remains unproven.

### Can Carthamus tinctorius support bone health?

Hydroxysafflor yellow A, a key compound in Carthamus tinctorius, has shown inhibitory effects on bone-related processes in laboratory studies, suggesting potential bone health applications. In vitro research indicates the ingredient may protect osteoblasts by reducing oxidative stress markers like malondialdehyde. However, these findings are limited to cellular studies, and human evidence for bone health benefits is currently lacking.

### What is the difference between safflower seed oil and Carthamus tinctorius extract supplements?

Safflower seed oil is derived from the plant's seeds and is rich in polyunsaturated fatty acids, primarily used as a culinary oil or for general wellness. Carthamus tinctorius extracts—particularly water extracts and those containing hydroxysafflor yellow A—concentrate bioactive compounds with demonstrated antioxidant and neuroprotective potential in research. The extract forms studied for specific health effects differ substantially from whole seed oil in composition and mechanism of action.

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