Myroxylon Balsamum Resin

Myroxylon Balsamum Resin and pregnancy

Caution Advised

• Common allergen
• Absorbed into the body

Myroxylon Balsamum Resin (Peru Balsam) is a natural tree resin used in cosmetics as a fragrance and for wound-healing properties. It contains multiple bioactive compounds including benzoic acid derivatives and cinnamic acid compounds that can be absorbed through skin. While there is no direct evidence that Peru Balsam causes fetal harm, pregnancy is a time when the immune system changes and skin can become more reactive. Developing a new allergic sensitivity during pregnancy could lead to chronic contact dermatitis that persists after delivery. The resin contains multiple chemical components, some of which are absorbed systemically, though safety data specific to pregnancy is lacking. Most concerning is that Peru Balsam is extremely allergenic—it's one of the most common causes of cosmetic allergic reactions. While regulatory bodies don't specifically prohibit Peru Balsam during pregnancy, dermatologists generally recommend avoiding known high-risk allergens during this time, as developing sensitization can have long-term consequences. The American Contact Dermatitis Society lists it as a top allergen. If you've used products with Peru Balsam before pregnancy without issues, continuing limited use in rinse-off products is likely acceptable, but pregnancy is not the time to start using new products containing this ingredient.

Myroxylon Balsamum Resin and breastfeeding

Safe to Use

• Common allergen
• Infant exposure

Myroxylon Balsamum Resin (Peru Balsam) is primarily a concern during breastfeeding due to its strong fragrance and high allergenicity rather than any toxicity to infants through milk transfer. The main risk is direct contact between products containing Peru Balsam and your baby's skin, which could cause an allergic reaction. Additionally, the strong fragrance might be off-putting to some infants. There's no evidence that compounds from Peru Balsam transfer to breast milk in amounts that would affect breastfed infants, but topical absorption does occur. If you're using a product with Peru Balsam, avoid application to areas near the breast where your baby might come into direct contact. Many breastfeeding mothers prefer to avoid strongly fragranced products during breastfeeding. If you have no history of sensitivity to Peru Balsam, minimal use in products applied to areas away from the breastfed baby is generally acceptable.

Myroxylon Balsamum Resin and postpartum

Caution Advised

• Common allergen
• Irritant

Peru Balsam has traditional use in wound healing and has antimicrobial properties that could theoretically help with postpartum concerns like stretch marks or healing tissues. However, its benefits are outweighed by its high risk of causing allergic contact dermatitis. Postpartum is a time when skin may already be stressed and reactive due to hormonal changes. Introducing a highly allergenic ingredient during this period increases the risk of developing a lifelong sensitivity. Once you become allergic to Peru Balsam, you may also react to related substances like vanilla, cinnamon, and certain citrus oils. For any healing or anti-inflammatory benefits you're seeking, there are much safer alternatives without Peru Balsam's allergenicity profile.

Myroxylon Balsamum Resin and trying to conceive

Safe to Use

• Common allergen

Peru Balsam has no known effects on fertility, ovulation, or reproductive hormones. The primary concern is its extremely high allergenicity. Women trying to conceive who have never used Peru Balsam before should avoid starting now, as developing an allergy creates a long-term sensitivity that you'd need to manage through pregnancy and beyond. If you've used products with Peru Balsam previously without problems, continuing use while trying to conceive is unlikely to affect your fertility. However, consider discontinuing before pregnancy begins to avoid potential issues with increased skin sensitivity during pregnancy.

Myroxylon Balsamum Resin and PCOS

Safe to Use

• Common allergen

Peru Balsam has antimicrobial and anti-inflammatory properties that could theoretically benefit acne-prone skin associated with PCOS. However, any potential benefits must be weighed against its high risk of causing allergic reactions. There is no evidence that Peru Balsam affects hormones, androgens, or insulin sensitivity relevant to PCOS. Its primary concern is being one of the most common cosmetic allergens, which makes it a poor choice even for inflammatory skin conditions. Women with PCOS can use products containing Peru Balsam if they have a history of tolerating it well, but it's not recommended for new use. The inflammatory reaction from an allergy could worsen acne and skin inflammation. There are many anti-inflammatory ingredients with better safety profiles for managing PCOS-related skin concerns.

Myroxylon Balsamum Resin and general use

Caution Advised

• Common allergen
• Irritant

Myroxylon Balsamum Resin, commonly known as Peru Balsam or Balsam of Peru, is a tree resin used for fragrance and its antimicrobial, anti-inflammatory properties. It has a warm, vanilla-like scent and appears in perfumes, lotions, and wound-healing products. Peru Balsam is one of the most significant cosmetic allergens globally. The American Contact Dermatitis Society consistently ranks it among the top allergens causing contact dermatitis. It causes delayed allergic reactions (type IV hypersensitivity), meaning symptoms like redness, itching, scaling, or blisters may appear 24-72 hours after exposure. Once sensitized to Peru Balsam, you remain allergic for life and may also react to related substances like cinnamon, clove oil, vanilla, citrus peels, and certain foods. Studies show 2-6% of people tested for allergies react to Peru Balsam. Many dermatologists advise against using products containing Peru Balsam, particularly for individuals with sensitive skin, eczema, or known fragrance allergies. The European Union requires it to be listed on labels. If you develop persistent itching, redness, or rash from a cosmetic product, Peru Balsam is a likely culprit. Those already using products with Peru Balsam without issue may continue, but it's not recommended for first-time use given the high risk of sensitization.

Everything else flagged for the same profiles

• Flagged in pregnancy
• Flagged in postpartum

Related ingredients

Ingredients suggested in place of Myroxylon Balsamum Resin, each one with its own page here.

• Allantoin

Ingredients that raise the same concerns.

• Citrus Aurantium Bergamia Fruit OilInfant exposure, Irritant, Common allergen
• Cocamide DEAInfant exposure, Irritant, Common allergen
• Juniperus Mexicana OilInfant exposure, Irritant, Common allergen
• Cinnamomum Zeylanicum Bark ExtractInfant exposure, Irritant, Common allergen
• Ocimum Basilicum OilInfant exposure, Irritant, Common allergen
• Helichrysum Italicum Flower OilInfant exposure, Irritant, Common allergen

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 15 September 2026.