Ingredient
Diethylamine
Diethylamine is flagged for pregnancy, breastfeeding, postpartum, trying to conceive, PCOS and general use. The concern behind the strongest flag is absorbed into the body and carcinogen concern.
- DEA
- N-Ethylethanamine
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Not Recommended
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 6 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 4 of 5
- Higher means more likely to sting or redden
Diethylamine and pregnancy
Not Recommended
- Absorbed into the body
- Carcinogen concern
- Irritant
Diethylamine (DEA) is a chemical compound used as a pH adjuster and buffering agent in cosmetic formulations. It helps stabilize product formulations and can contribute to foam creation in certain products. The primary concern with DEA during pregnancy is its potential to form carcinogenic nitrosamines when combined with certain preservatives or other ingredients. According to the IARC, DEA is classified as possibly carcinogenic to humans. While direct evidence of harm during pregnancy is limited, animal studies have shown that DEA can be absorbed through the skin and may affect fetal development at high doses. The concern is heightened during pregnancy due to increased skin permeability and the developing fetus's vulnerability to environmental toxins. While no regulatory body has issued an absolute ban on DEA in pregnancy, many dermatologists and obstetricians recommend avoiding it as a precautionary measure. The EU restricts DEA use when nitrosamine formation is possible. Given safer alternatives exist and the potential for carcinogenic compound formation, most healthcare providers advise pregnant women to choose DEA-free products.
Diethylamine and breastfeeding
Caution Advised
- Absorbed into the body
- Irritant
Diethylamine is a pH-adjusting chemical that can be absorbed through the skin. While absorption rates are relatively low with topical application, DEA is a small molecule that can potentially enter the bloodstream. The concern during breastfeeding relates to potential systemic absorption and transfer into breast milk, though specific studies on this route of exposure are limited. DEA's classification as a possible carcinogen and its ability to form nitrosamines raise theoretical concerns about infant exposure through breast milk. Additionally, DEA can cause significant skin irritation, which may be problematic if applied to areas where the infant has direct contact. While there is no explicit prohibition on DEA use during breastfeeding, the AAD and many dermatologists recommend caution with potentially irritating and carcinogenic compounds during lactation. If products containing DEA are used, they should be kept away from the breast area and thoroughly washed off before breastfeeding.
Diethylamine and postpartum
Caution Advised
- Irritant
- Common allergen
- Carcinogen concern
Diethylamine is a chemical pH adjuster that can cause skin irritation and has been classified as possibly carcinogenic. Postpartum skin may be more sensitive due to hormonal changes, making irritation more likely. While the lack of breastfeeding eliminates concerns about milk transfer, DEA still poses risks of skin irritation, allergic reactions, and potential long-term health effects from repeated exposure. Given that safer buffering agents exist, many dermatologists recommend choosing DEA-free alternatives, especially for postpartum women whose skin may already be sensitive or compromised.
Diethylamine and trying to conceive
Caution Advised
- Absorbed into the body
- Carcinogen concern
Diethylamine is a chemical compound that can be absorbed through the skin and has been classified as possibly carcinogenic. When trying to conceive, minimizing exposure to potential toxins is generally recommended. While there is limited direct evidence linking DEA to fertility issues, its potential for systemic absorption and classification as a possible carcinogen suggest caution. The compound's ability to form nitrosamines is concerning for preconception health. Most fertility specialists recommend minimizing exposure to potential carcinogens and irritants when trying to conceive, as overall toxic burden may affect reproductive health.
Diethylamine and PCOS
Caution Advised
- Irritant
- Can inflame skin
Diethylamine is a pH-adjusting chemical compound that can cause significant skin irritation and allergic reactions. It has no direct hormonal effects but its irritating properties can be problematic. For women with PCOS, the main concern with DEA is its potential to irritate skin that may already be sensitive or inflamed due to hormonal imbalances. PCOS-related acne or skin conditions can be worsened by irritating ingredients. DEA does not directly affect hormone levels or insulin sensitivity, but chronic skin irritation can worsen inflammation, which is already a concern in PCOS. While DEA doesn't interfere with PCOS management or hormone therapy, its irritating properties and carcinogenic classification make it a less desirable choice. Women with PCOS would benefit from choosing gentler pH adjusters that don't compromise skin barrier function or increase inflammation.
Diethylamine and general use
Caution Advised
- Irritant
- Common allergen
- Carcinogen concern
Diethylamine (DEA) is an organic compound used as a pH adjuster, buffering agent, and sometimes as a foaming or fragrance component in cosmetics. It helps stabilize product formulations and adjust acidity levels. DEA is classified by the IARC as possibly carcinogenic to humans (Group 2B). The primary health concern is its ability to react with other cosmetic ingredients to form nitrosamines, which are known carcinogens. DEA is also a significant skin and eye irritant that can cause allergic contact dermatitis with repeated exposure. Studies have shown that DEA can be absorbed through the skin, raising concerns about systemic effects. The EU's SCCS restricts DEA in cosmetic products, particularly when nitrosamine formation is possible. The FDA continues to evaluate DEA in cosmetics but has not banned it outright. California's Prop 65 lists DEA as causing cancer. Many modern cosmetic brands are reformulating to use safer pH adjusters like citric acid or aminomethyl propanol. Consumers sensitive to irritation or concerned about long-term health effects should consider DEA-free alternatives.
Everything else flagged for the same profiles
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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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