Curcuma Longa (Turmeric) Root Extract
Reviewed by Rosie · Last updated 14 Aug 2026
Also known as: tetrahydrodiferuloylmethane, Curcuma Longa Root Extract
Also known as turmeric, this spice has a long history of use in traditional medicine.
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What Is Curcuma Longa (Turmeric) Root Extract?
Curcuma longa (turmeric) root extract is a spice that's best known for its use in cooking. However, it has a long history of use in skin care and is still used in many cultures today. The chief component of turmeric that gives it its characteristic yellow color is curcumin. Curcumin has been extensively studied for its antioxidant and soothing properties.
Turmeric and its derivatives have been shown to interrupt signaling messages in skin's surface that trigger signs of irritation. It's also been shown to have a calming effect that may be of benefit for breakout-prone skin. In its raw form, turmeric can be sensitizing if applied to skin. However, in skin care formulations it is typically used as an extract where the concentration of its volatile aromatic components (the parts that can be sensitizing) is low, so it is not considered to be a risk for sensitization.
Look for turmeric extract in products that are packaged in opaque, air-restrictive containers to preserve its antioxidant benefits.
How It Works
Curcuminoids are believed to work by interacting with inflammatory signalling pathways in skin cells, potentially reducing the production of pro-inflammatory markers. This mechanism may help calm irritated or inflamed skin, though the extent of this effect in topical skincare formulations depends on penetration depth and stability of the active compounds.
As an antioxidant, the extract can neutralise oxidative stress, which contributes to visible skin ageing and inflammation. However, the bioavailability of these compounds through topical application varies significantly based on formulation design and concentration.
Clinical Evidence & References
In vitro studies using cultured skin cells have shown that hot water extracts of Curcuma longa can reduce inflammatory markers in UV-irradiated keratinocytes and support hyaluronan production, which is important for skin hydration. A small randomised controlled trial involving 47 healthy participants found measurable improvements in skin hydration and UV resilience over an 8-week period with daily oral consumption of the extract, though this reflects systemic rather than topical effects.
Evidence for topical application is more limited. While the traditional use and laboratory data are promising, larger clinical studies specifically examining topical formulations would help establish whether the concentrations typically used in skincare products deliver meaningful benefits to the skin. The stability and penetration of curcuminoids in cosmetic vehicles remain areas requiring further investigation.
Published Research
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Journal of Cosmetic Dermatology, March 2022, pages 1,125-1,131 Journal of Cosmetic Dermatology, 2022
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Phytotherapy Research, August 2016, pages 1,243-1,264 Phytotherapy Research, 2016
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Journal of the German Society of Dermatology, October 2013, pages 988-994 Journal of the German Society of Dermatology, 2013
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Journal of Cosmetic Dermatology, March 2013, pages 49-56 Journal of Cosmetic Dermatology, 2013
How to Use
Curcuma longa extract is most commonly encountered as a minor ingredient in cleansers, toners, serums and masks rather than as a starring active. Use products containing this extract as directed, allowing sufficient contact time with skin where appropriate for the product type. If combining with other actives, introduce gradually to monitor for any sensitivity. The extract's fragrance component means it is most suitable for those who appreciate botanical scents in their skincare routine.
Safety & Precautions
Frequently Asked Questions
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Take the skin quizOther forms of Curcuma Longa (Turmeric) Root Extract
These appear on ingredients lists under different names but are the same substance. Curcuma Longa (Turmeric) Root Extract is the common form.
Related Ingredients
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