Ingredient
Di-Sodium Iodide
Di-Sodium Iodide is flagged for pregnancy, breastfeeding, trying to conceive and PCOS. The concern behind the strongest flag is fetal development and hormone disruptor.
- Disodium Iodide
- Sodium Iodide NaI
- Iodide 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
- 4 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
Di-Sodium Iodide and pregnancy
Not Recommended
- Fetal development
- Hormone disruptor
Sodium Iodide is a water-soluble iodine salt used as an antimicrobial preservative in some cosmetic products. Iodine is essential for thyroid function, but both deficiency and excess can be problematic, especially during pregnancy when thyroid hormones are critical for fetal brain development. According to ACOG, thyroid function is crucial during pregnancy, and iodine balance is carefully regulated. Excessive iodine exposure from topical products can be absorbed through skin and disrupt maternal thyroid function, which in turn affects fetal development. The American Thyroid Association notes that iodine excess during pregnancy can cause fetal hypothyroidism or hyperthyroidism. Topical iodine absorption is significant enough to affect thyroid levels, particularly with repeated use over large surface areas. Most obstetricians and dermatologists recommend avoiding non-essential topical iodine sources during pregnancy due to the importance of maintaining stable thyroid function. While dietary iodine is important and recommended (prenatal vitamins contain appropriate amounts), additional exposure from cosmetics is unnecessary and potentially problematic. Women should choose iodine-free preservative systems in skincare during pregnancy.
Di-Sodium Iodide and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
Iodine is both essential for infant development and potentially problematic in excess. Breast milk naturally contains iodine to support infant thyroid function, but levels must be carefully balanced. According to the American Academy of Pediatrics and international lactation medicine guidelines, iodine readily transfers into breast milk, and excessive maternal iodine intake can lead to high breast milk iodine concentrations. This can cause transient hypothyroidism in breastfed infants, as their thyroid glands are particularly sensitive. Topical iodine absorption is well-documented, with studies showing that povidone-iodine and iodine salts applied to skin can significantly elevate maternal serum iodine, which then transfers to milk. The AAP recommends that breastfeeding mothers avoid unnecessary topical iodine sources. While some iodine in the diet is essential, cosmetic sources represent avoidable excess exposure. Most pediatricians and dermatologists advise breastfeeding mothers to choose preservative systems that don't contain iodine compounds to protect infant thyroid health.
Di-Sodium Iodide and postpartum
Safe to Use
Postpartum women who are not breastfeeding have fewer concerns with sodium iodide than during pregnancy or while breastfeeding, as there's no risk of fetal or infant exposure. However, thyroid health remains important postpartum. Some women experience postpartum thyroiditis, a condition where thyroid function fluctuates after delivery. Women with thyroid conditions or a history of thyroid dysfunction should still be cautious with topical iodine sources. For women with normal thyroid function and no history of thyroid disease, occasional use in cosmetics at low concentrations poses minimal risk.
Di-Sodium Iodide and trying to conceive
Caution Advised
- Hormone disruptor
- Fertility effects
Thyroid function is crucial for fertility and early pregnancy. Both hypothyroidism and hyperthyroidism can impair ovulation and reduce fertility. Maintaining stable thyroid function is a key component of preconception care. Reproductive endocrinologists typically check thyroid function when evaluating fertility, as even subclinical thyroid dysfunction can affect conception rates and early pregnancy outcomes. While dietary iodine is important for fertility, excess iodine from cosmetic sources is unnecessary and could disrupt thyroid balance during this critical time. Women trying to conceive are advised to avoid unnecessary iodine sources while ensuring adequate dietary intake through prenatal vitamins.
Di-Sodium Iodide and PCOS
Caution Advised
- Interferes with hormones
PCOS is associated with increased rates of thyroid dysfunction, particularly hypothyroidism and autoimmune thyroid disease. Women with PCOS are more likely to have underlying thyroid issues that could be exacerbated by iodine dysregulation. Studies show that women with PCOS have higher prevalence of thyroid antibodies and subclinical thyroid dysfunction. Excessive iodine exposure can trigger or worsen autoimmune thyroid conditions in susceptible individuals. The antimicrobial properties might help with PCOS-related acne, but this benefit doesn't outweigh the thyroid concerns. Endocrinologists treating PCOS typically monitor thyroid function closely, as thyroid disorders can worsen PCOS symptoms and vice versa. While not absolutely contraindicated, women with PCOS should be aware of their thyroid status before using products with significant iodine content. Those with known thyroid issues should avoid topical iodine sources.
Di-Sodium Iodide and general use
Safe to Use
- Endocrine disruptor
Sodium Iodide provides antimicrobial benefits in cosmetic formulations, helping to preserve products and provide antiseptic properties. For the general population with normal thyroid function, occasional use in cosmetics typically doesn't pose significant risks. The main concern is for individuals with thyroid conditions (hyperthyroidism, hypothyroidism, thyroiditis, or thyroid nodules), who should avoid unnecessary topical iodine sources as they can exacerbate thyroid dysfunction. People with iodine allergies or sensitivities should also avoid this ingredient. For healthy individuals without thyroid issues, cosmetic use is generally well-tolerated. While not restricted in most cosmetic regulations, awareness of iodine's effects on thyroid function is important. Those with family history of thyroid disease or unexplained symptoms like fatigue, weight changes, or irregular heartbeat should consult healthcare providers about iodine sources. For most people, preservative systems not containing iodine are preferable to avoid any potential thyroid effects.
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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