Propylene glycol does the same water-holding job as glycerin and pushes osmolality up the same way. It is also a recognised contact allergen and irritant for a minority of people, which matters more on mucosal tissue than it does on a forearm.
Look for instead: Formulas that use propanediol or nothing at all in this slot, and that publish an osmolality figure.
WHO/UNFPA guidance suggests personal lubricants stay at or below 380 mOsm/kg, and ideally never exceed 1,200 mOsm/kg, because high-osmolality formulas pull water out of the thin cell layer lining the vagina and rectum. Ingredient lists do not print osmolality, so the practical move is to look for the number on the product page or ask the manufacturer.
Matters more if: menopause-related dryness; sensitive or irritation-prone.
It is not automatically a problem, but it carries a known trade-off worth understanding first. Propylene glycol does the same water-holding job as glycerin and pushes osmolality up the same way. It is also a recognised contact allergen and irritant for a minority of people, which matters more on mucosal tissue than it does on a forearm.
Its role is humectant (draws in water). Not automatically a problem, but it carries a known trade-off worth understanding before you rely on the product.
Yes — it is one of the main reasons a water-based formula ends up well above the recommended range. WHO/UNFPA guidance suggests personal lubricants stay at or below 380 mOsm/kg, and ideally never exceed 1,200 mOsm/kg, because high-osmolality formulas pull water out of the thin cell layer lining the vagina and rectum. Ingredient lists do not print osmolality, so the practical move is to look for the number on the product page or ask the manufacturer.
Formulas that use propanediol or nothing at all in this slot, and that publish an osmolality figure.
Yes. An ingredient list shows what is in a formula, never how much, and two products sharing an ingredient can behave completely differently. The product's own label and instructions always take priority over a general category rating.
Educational information about ingredient categories only — not medical advice, not a product-safety verification, and not a claim that any formula is safe or unsafe for your body. An ingredient list shows what is in a product, never how much. A product's own label and instructions always take priority. Stop and seek care for pain, bleeding, allergic reaction, or worsening symptoms.