Ingredient
Undecylenamide DEA
Undecylenamide DEA is flagged for pregnancy, breastfeeding and trying to conceive. The concern behind the strongest flag is absorbed into the body.
- Undecylenic Acid Diethanolamide
- Undecylenoyl Diethanolamide
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Caution Advised
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 3 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
Undecylenamide DEA and pregnancy
Caution Advised
- Absorbed into the body
Undecylenamide DEA is a diethanolamine (DEA) derivative used as an antimicrobial agent and thickener in cosmetics. It helps preserve products and control their consistency while providing antibacterial benefits. The primary concern with DEA compounds during pregnancy relates to their potential contamination with nitrosamines, which are classified as possible carcinogens. While specific pregnancy studies on topical undecylenamide DEA are lacking, DEA compounds can be absorbed through the skin to some degree. The European Commission's Scientific Committee on Consumer Safety has expressed concerns about DEA derivatives and requires manufacturers to demonstrate that nitrosamine formation is prevented. Most dermatologists recommend caution with DEA-containing products during pregnancy due to the theoretical risk of nitrosamine exposure, even though topical application differs significantly from oral exposure. Given the limited safety data specific to pregnancy and the availability of alternative preservatives and antimicrobials, many women choose to avoid products containing DEA derivatives during pregnancy as a precautionary measure.
Undecylenamide DEA and breastfeeding
Caution Advised
- Absorbed into the body
- Infant exposure
As a DEA derivative, undecylenamide DEA shares the same concerns during breastfeeding as during pregnancy. The ingredient can be absorbed through the skin, and there is theoretical potential for transfer to breast milk, though specific studies on this pathway are lacking. The main concern for breastfeeding mothers relates to potential nitrosamine contamination in DEA compounds. While the risk from topical cosmetic use is likely lower than from dietary sources, the AAD notes that many dermatologists recommend limiting exposure to questionable ingredients when breastfeeding, especially when safer alternatives exist. Given the limited safety data and the precautionary principle, healthcare providers often suggest choosing products without DEA derivatives during the breastfeeding period. The potential for skin-to-skin transfer to the infant during breastfeeding or close contact is an additional consideration.
Undecylenamide DEA and postpartum
Safe to Use
- Common allergen
- Irritant
For postpartum women who are not breastfeeding, undecylenamide DEA presents primarily dermatological concerns rather than systemic reproductive concerns. The ingredient may cause contact dermatitis or irritation in sensitive individuals, particularly on postpartum skin that may already be stressed. The antimicrobial properties can be beneficial for preventing bacterial growth in products, though the potential for irritation should be weighed against these benefits. Women with sensitive skin or those recovering from pregnancy-related skin changes may want to patch-test products containing this ingredient before regular use.
Undecylenamide DEA and trying to conceive
Caution Advised
- Absorbed into the body
Women trying to conceive should approach undecylenamide DEA with the same caution as during early pregnancy, since conception timing is often uncertain. The theoretical concerns about DEA derivatives and potential nitrosamine contamination apply during the preconception period as well. While there is no direct evidence linking topical undecylenamide DEA to fertility issues, the precautionary principle suggests minimizing exposure to ingredients with uncertain safety profiles when planning pregnancy. Many healthcare providers recommend switching to products with better-studied ingredients during the TTC phase to avoid any potential risks during the critical early weeks of pregnancy when women may not yet know they have conceived.
Undecylenamide DEA and PCOS
Safe to Use
Undecylenamide DEA functions as an antimicrobial agent that can help control bacterial growth in cosmetic products. For women with PCOS who often experience acne-prone skin, the antimicrobial properties may provide indirect benefits by maintaining product integrity and preventing bacterial contamination. There is no evidence that this ingredient affects hormones, insulin sensitivity, or other metabolic factors associated with PCOS. The primary consideration is individual skin sensitivity, as some women with PCOS may have reactive skin that responds to DEA derivatives with irritation. Women with PCOS-related acne can safely use products containing this ingredient, though they should monitor for any irritation or allergic reactions, which can occur in sensitive individuals regardless of PCOS status.
Undecylenamide DEA and general use
Safe to Use
- Common allergen
- Irritant
For the general population, undecylenamide DEA is considered a relatively safe cosmetic ingredient when used in properly formulated products that prevent nitrosamine formation. It serves effectively as an antimicrobial preservative and viscosity controller in various personal care products. The primary concerns for general use are potential skin irritation and allergic contact dermatitis in sensitive individuals. The SCCS has established that DEA compounds can cause sensitization in some people, though severe reactions are uncommon. The theoretical risk of nitrosamine contamination is mitigated by modern manufacturing practices and regulatory requirements. The EU Cosmetics Regulation permits undecylenamide DEA with restrictions on concentration and requirements for manufacturers to demonstrate that products are formulated to prevent nitrosamine formation. For individuals without specific sensitivities, this ingredient poses minimal risk when used in compliant cosmetic products.
Everything else flagged for the same profiles
Related ingredients
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Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
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A label has thirty of them. Truva reads the whole list at once and answers for the profile you set: pregnancy, breastfeeding, postpartum, trying to conceive, PCOS, or general use.
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