Artichoke extract: properties, uses, pros, cons, safety

(Cynara scolymus extract) (Cynara cardunculus var. scolymus; Asteraceae)

Artichoke extract is a botanical extract typically obtained from the leaves of Cynara (artichoke). In the food sector it is mainly used in dietary supplements (capsules, tablets, powders, liquid extracts) with positioning linked to digestive support and lipid metabolism, while in cosmetics it appears in “botanical” formulas where the main interest is antioxidant contribution and skin conditioning. Practical performance depends strongly on the commercial grade, solvent/carrier, extract strength, and standardization.

Definition

Artichoke extract is a variable-composition mixture: it is not a single molecule, but a set of constituents extracted from the botanical matrix. Quality and repeatability depend on the plant part used (often leaves), origin, drying conditions, extraction system, and the manufacturer’s specifications.

In botanical technical language, a DER (drug extract ratio, herb-to-extract ratio; practical note: a higher DER often indicates a more “concentrated” extract, but real quality depends primarily on standardization and impurity control).

Main uses

Food
Used in supplements as dry or liquid extracts, sometimes standardized to caffeoylquinic acids or other markers. Reliable use requires defined markers, impurity limits, and batch-to-batch consistency, as well as prudent labelling for claims (market- and authorization-dependent).

Cosmetics
Used in face/body products where botanical positioning and antioxidant support are sought. Formulation must consider colour/odour stability and compatibility with preservatives and the emulsifying system.

INCI functions.

Antioxidant agent. Ingredient that counteracts oxidative stress and prevents cell damage. Free radicals, pathological inflammatory processes, reactive nitrogen species and reactive oxygen species are responsible for the ageing process and many diseases caused by oxidation.

Skin conditioning agent. It is the mainstay of topical skin treatment as it has the function of restoring, increasing or improving skin tolerance to external factors, including melanocyte tolerance. The most important function of the conditioning agent is to prevent skin dehydration, but the subject is rather complex and involves emollients and humectants that can be added in the formulation.

Key constituents

Composition is process-dependent and, in practice, is often described by classes/markers. In leaf-based products, typically relevant constituents include caffeoylquinic acids (including chlorogenic acid), dicaffeoylquinic acids (with cynarin often cited as a representative compound), flavonoids (luteolin derivatives), and sesquiterpene lactones (e.g., cynaropicrin). Some preparations may also include polysaccharide fractions (e.g., inulin) depending on process and grade. Operationally, formulators focus on declared markers, colour/odour, and long-term stability.

Nutritional use note and bioactive compounds

In supplements, interest is linked to phenolic compounds and the plant’s characteristic bitter profile, with frequent use in “digestive” products. From a technical standpoint, the most important aspects are: marker definition (or sum of markers), per-serving dose consistency, and impurity/contaminant control. Consumer communication should remain aligned with claims permitted in the destination market and the finished-product documentation.

Energy (calories)

Practically, at typical use levels (mg to low g/day) the caloric contribution is generally negligible relative to the overall energy profile of the finished product; it is not an operational primary parameter compared with assay/markers and quality.

Identification data and specifications

Indicative physico-chemical properties

Functional role and practical mechanism of action

In supplements, the role is that of a botanical ingredient positioned mainly for digestive and metabolic support, linked to the profile of phenolic compounds and other leaf-characteristic fractions. In cosmetics, use is more often oriented to antioxidant and skin-conditioning functions, with practical performance dependent on real stability in the formula and the use level compatible with colour/odour.

Formulation compatibility

In powders and tablets, key issues are flowability, blend uniformity, and moisture control (caking risk). In liquids, perceived solubility, haze, and time stability become central; in cosmetic emulsions, beyond physical stability, colour/odour impact and preservative compatibility must be managed. In all cases, supplier variability makes a specification including markers and organoleptic criteria useful.

Use guidelines

Use levels/doses depend on grade and target (positioning, marker content, sensory profile). Good practice is to define markers and specifications, validate stability in real packaging, set batch acceptance criteria, and control botanical-relevant contaminants (especially for continuous use products).

Quality, grades, and specifications

Variability across grades can be significant. Robust control includes: marker specifications, microbiological limits consistent with dosage form, metals and contaminant control (pesticides where relevant), carrier declaration, and batch-to-batch repeatability verification. Adoption of GMP (good manufacturing practice; benefit: reduces variability and contamination) and HACCP (hazard analysis and critical control points; benefit: identifies and controls food-safety risks) strengthens traceability and supply reliability.

Safety, regulatory, and environment

Safety must be assessed on the finished product considering dose, duration of use, and target population. For variable-composition botanical extracts, practical topics include contaminant control, managing compositional variability through standardization, and individual tolerability (especially in sensitive users).

Allergen.
It is not typically classified as a labelling allergen, but reactions may occur in individuals sensitized to the Asteraceae (formerly Compositae) family due to possible cross-reactivity.

Contraindications (brief).
Use caution in cases of bile duct obstruction or biliary disorders (medical evaluation advisable), and in known hypersensitivity to Asteraceae. During pregnancy/breastfeeding and in people on chronic therapies, a conservative, professional-guided approach is prudent.

Formulation troubleshooting

Haze or precipitation in liquids.
Action: optimize pH and order of addition, choose a grade with a more suitable carrier, validate via accelerated stability and real packaging.

Colour/odour drift over time.
Action: select a more stable grade, reduce light/oxygen stress (packaging), introduce tighter organoleptic criteria in the specification.

Perceptible batch-to-batch variability.
Action: strengthen marker and impurity specifications, increase incoming controls, and agree on standardization strategies with the supplier.

Conclusion

Artichoke extract is a variable-composition botanical used mainly in supplements and selectively in cosmetics. For robust industrial use, the decisive factors are: standardization (markers), contaminant control, organoleptic stability, and matrix compatibility, together with a finished-product safety assessment including a concise note on potential allergenicity and practical contraindications.

Mini-glossary

DER. Drug extract ratio; an indicator of herb-to-extract ratio (note: it does not replace marker standardization).
GMP. Good manufacturing practice; benefit: reduces variability and contamination through controlled manufacturing practices.
HACCP. Hazard analysis and critical control points; benefit: systematic prevention and control of food-safety hazards via critical control points.

Studies

Its predominant use is culinary, but it is widely used in the medical field. In fact, phytonutrients are extracted from its leaves and roots:

• stimulate bile flow from the liver (1)
• reduce heartburn
• counter-cholesterol harmful LDL (2)
• counteract colon irritability
• reduce bladder infections
• reduce nausea

Its polyphenol content, exerts an antioxidant activity (3) and also chlorogenic acid, luteolin, apigenine, cinary, coffee acid derivatives, flavonoids (4) and polyphenols help improve the integrity and functionality of endothelial cells.

Artichoke studies

References______________________________________________________________________

(1) Gebhardt R. Prevention of taurolithocholate-induced hepatic bile canalicular distortions by HPLC-characterized extracts of artichoke (Cynara scolymus) leaves.   Planta Med. 2002 Sep;68(9):776-9.

Abstract. The effects of water-soluble extracts of artichoke (Cynara scolymus L.) leaves on taurolithocholate-induced cholestatic bile canalicular membrane distortions were studied in primary cultured rat hepatocytes using electron microscopy. Artichoke extracts at concentrations between 0.08 and 0.5 mg/ml were able to prevent the formation of bizarre canalicular membrane transformations in a dose-dependent manner when added simultaneously with the bile acid. However, prevention also occurred when the hepatocytes were preincubated with the extracts, indicating that absorption of the bile acid to components of the extracts was not involved. These results demonstrate that artichoke leaf extracts exert a potent anticholestatic action at least in the case of taurolithocholate. This effect may contribute to the overall hepatoprotective influence of this herbal formulation.

(2) Rondanelli M, Giacosa A, Opizzi A, Faliva MA, Sala P, Perna S, Riva A, Morazzoni P, Bombardelli E. Beneficial effects of artichoke leaf extract supplementation on increasing HDL-cholesterol in subjects with primary mild hypercholesterolaemia: a double-blind, randomized, placebo-controlled trial.  Int J Food Sci Nutr. 2013 Feb;64(1):7-15. doi: 10.3109/09637486.2012.700920. 

Abstract. The aim of this study was to evaluate the effects of artichoke leaf extract (ALE) supplementation (250 mg, 2 b.i.d.) on the lipid pattern. A randomized, double-blind, placebo-controlled clinical trial was performed on 92 overweight subjects with primary mild hypercholesterolaemia for 8 weeks. Forty-six subjects were randomized to supplementation (age: 54.2 ± 6.6 years, body mass index (BMI): 25.8 ± 3.9 kg/m(2), male/female: 20/26) and 46 subjects to placebo (age: 53.8 ± 9.0 years, BMI: 24.8 ± 1.6 kg/m(2), male/female: 21/25). Verum supplementation was associated with a significant increase in mean high-density lipoprotein (HDL)-cholesterol (p < 0.001) and in mean change in HDL-cholesterol (HDL-C) (p = 0.004). A significantly decreased difference was also found for the mean change in total cholesterol (p = 0.033), low-density lipoprotein (LDL)-cholesterol (p < 0.001), total cholesterol/HDL ratio (p < 0.001) and LDL/HDL ratio (p < 0.001), when verum and placebo treatment were compared. These results indicate that ALE could play a relevant role in the management of mild hypercholesterolaemia, favouring in particular the increase in HDL-C, besides decreasing total cholesterol and LDL-cholesterol.

(3) Gebhardt R Antioxidative and protective properties of extracts from leaves of the artichoke (Cynara scolymus L.) against hydroperoxide-induced oxidative stress in cultured rat hepatocytes.    Toxicol Appl Pharmacol. 1997 Jun; 144(2):279-86.

Abstract. Primary rat hepatocyte cultures exposed to tert-butylhydroperoxide (t-BHP) or cumene hydroperoxide were used to assess the antioxidative and protective potential of water-soluble extracts of artichoke leaves. Both hydroperoxides stimulated the production of malondialdehyde (MDA), particularly when the cells were pretreated with diethylmaleate (DEM) in order to diminish the level of cellular glutathione (GSH). Addition of artichoke extracts did not affect basal MDA production, but prevented the hydroperoxide-induced increase of MDA formation in a concentration-dependent manner when presented simultaneously or prior to the peroxides. The effective concentrations (down to 0.001 mg/ml) were well below the cytotoxic levels of the extracts which started above 1 mg/ml. The protective potential assessed by the LDH leakage assay and the MTT assay closely paralleled the reduction in MDA production and largely prevented hepatocyte necrosis induced by the hydroperoxides. The artichoke extracts did not affect the cellular level of glutathione (GSH), but diminished the loss of total GSH and the cellular leakage of GSSG resulting from exposure to t-BHP. Chlorogenic acid and cynarin accounted for only part of the antioxidative principle of the extracts which was resistant against tryptic digestion, boiling, acidification, and other treatments, but was slightly sensitive to alkalinization. These results demonstrate that artichoke extracts have a marked antioxidative and protective potential. Primary hepatocyte cultures seem suitable for identifying the constituents responsible for these effects and for elucidating their possible mode of action.

(4) Tang X, Wei R, Deng A, Lei T  Protective Effects of Ethanolic Extracts from Artichoke, an Edible Herbal Medicine, against Acute Alcohol-Induced Liver Injury in Mice.   Nutrients. 2017 Sep 11; 9(9):.

Abstract. Oxidative stress and inflammation are well-documented pathological factors in alcoholic liver disease (ALD). Artichoke (Cynara scolymus L.) is a healthy food and folk medicine with anti-oxidative and anti-inflammatory properties. This study aimed to evaluate the preventive effects of ethanolic extract from artichoke against acute alcohol-induced liver injury in mice. Male Institute of Cancer Research mice were treated with an ethanolic extract of artichoke (0.4, 0.8, and 1.6 g/kg body weight) by gavage once daily. Up to 40% alcohol (12 mL/kg body weight) was administered orally 1 h after artichoke treatment. All mice were fed for 10 consecutive days. Results showed that artichoke extract significantly prevented elevated levels of aspartate aminotransferase, alanine aminotransferase, triglyceride, total cholesterol, and malondialdehyde. Meanwhile, the decreased levels of superoxide dismutase and glutathione were elevated by artichoke administration. Histopathological examination showed that artichoke attenuated degeneration, inflammatory infiltration and necrosis of hepatocytes. Immunohistochemical analysis revealed that expression levels of toll-like receptor (TLR) 4 and nuclear factor-kappa B (NF-κB) in liver tissues were significantly suppressed by artichoke treatment. Results obtained demonstrated that artichoke extract exhibited significant preventive protective effect against acute alcohol-induced liver injury. This finding is mainly attributed to its ability to attenuate oxidative stress and suppress the TLR4/NF-κB inflammatory pathway. To the best of our knowledge, the underlying mechanisms of artichoke on acute ALD have been rarely reported.