Ingredient
Disodium Selenite
Disodium Selenite is flagged for pregnancy, breastfeeding, trying to conceive, PCOS and general use. The concern behind the strongest flag is absorbed into the body and fetal development.
- Sodium Selenite
- Selenious Acid Disodium Salt
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
- 5 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
Disodium Selenite and pregnancy
Not Recommended
- Absorbed into the body
- Fetal development
Disodium Selenite is an inorganic selenium salt that can be absorbed through the skin and enter systemic circulation. Selenium is an essential nutrient, but the selenite form is particularly bioavailable and raises concerns about achieving excessive levels during pregnancy. While selenium is necessary for fetal development, both deficiency and excess can be harmful. According to ACOG, pregnant women need only 60 micrograms daily from all sources. Topical absorption from cosmetics could contribute to cumulative selenium exposure, potentially exceeding safe limits. Animal studies have shown that excess selenium during pregnancy can cause developmental abnormalities. The narrow margin between adequate and toxic levels makes monitoring total selenium exposure important during pregnancy. Most obstetricians and dermatologists recommend pregnant women avoid unnecessary selenium supplementation, including topical sources. Since dietary intake typically meets pregnancy requirements, adding topical selenite presents more risk than benefit. The EU's restrictive stance on selenium compounds in cosmetics reflects these safety concerns.
Disodium Selenite and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
Selenium readily transfers into breast milk, with concentrations reflecting maternal intake. While breastfed infants need selenium for development, they receive adequate amounts from breast milk when mothers have normal dietary intake. Topical absorption of selenite from cosmetics could increase maternal selenium levels and subsequently increase infant exposure through milk. The AAP notes that selenium toxicity in infants can occur with excessive maternal supplementation. Symptoms include irritability, vomiting, and developmental concerns. Since the selenite form is highly bioavailable and topical absorption is significant, its use during breastfeeding adds an unnecessary source of infant selenium exposure. Pediatricians and dermatologists typically advise breastfeeding mothers to avoid selenite-containing cosmetics. Safer antioxidant alternatives exist that provide similar benefits without the risk of infant overexposure. The risk-benefit ratio does not favor topical selenite use during lactation.
Disodium Selenite and postpartum
Safe to Use
- Irritant
For postpartum women not breastfeeding, disodium selenite presents lower concern than during pregnancy or lactation. The primary issue becomes local skin irritation rather than systemic effects on an infant. However, selenium's narrow therapeutic window still warrants caution. Women recovering from pregnancy may have depleted antioxidant stores, and selenium has legitimate benefits for skin health. However, safer and less irritating antioxidants are available. If using products with selenite, monitor for signs of irritation and ensure total selenium intake from all sources remains within normal limits.
Disodium Selenite and trying to conceive
Caution Advised
- Builds up in tissue
- Fertility effects
Women trying to conceive should optimize their selenium status before pregnancy, but this is typically achieved through diet or controlled oral supplementation. Topical selenite adds an unquantified source that could push levels too high or too low depending on individual status. Both selenium deficiency and excess can affect fertility. Since the goal when trying to conceive is to achieve optimal nutritional status before pregnancy, unpredictable absorption from topical products is not ideal. Reproductive endocrinologists prefer controlled, measurable selenium intake from dietary sources or specific supplements.
Disodium Selenite and PCOS
Caution Advised
- Interferes with hormones
Disodium Selenite has complex interactions with hormonal systems. Selenium plays a role in thyroid function and has been studied for its effects on insulin resistance in PCOS. Some research suggests selenium supplementation may benefit women with PCOS by improving metabolic markers. However, topical selenite is problematic because absorption is unpredictable and could lead to excessive exposure. Women with PCOS often already take selenium supplements, and adding topical sources increases toxicity risk. The selenite form is particularly concerning due to its high bioavailability. Endocrinologists generally do not recommend topical selenium products for PCOS management. If selenium supplementation is indicated, oral forms with controlled dosing are preferred. Topical antioxidants without hormonal effects provide safer options for PCOS-related skin concerns.
Disodium Selenite and general use
Caution Advised
- Absorbed into the body
- Irritant
Disodium Selenite serves as an antioxidant in cosmetics, providing some benefits for protecting skin from oxidative stress. However, its use is controversial due to selenium's toxicity potential. The selenite form is more bioavailable and potentially more irritating than organic selenium compounds. For the general population, concerns center on cumulative selenium exposure. Many people already consume selenium through diet and supplements. Adding topical sources could push individuals toward the upper tolerable limit (400 mcg/day for adults). Chronic excessive selenium can cause selenosis with symptoms including hair loss, nail changes, and neurological effects. The EU's restrictive approach to selenium compounds in cosmetics reflects regulatory concern about this ingredient. While not outright banned, its use is limited. Most dermatologists recommend choosing products with alternative antioxidants that provide similar benefits without toxicity risks. If using selenite-containing products, avoid simultaneous selenium supplementation and monitor for signs of irritation or toxicity.
Everything else flagged for the same profiles
Related ingredients
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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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