Xylitylglucoside

Xylitylglucoside is a sugar-derived humectant (often part of the Aquaxyl complex) typically used around ~1–5% to improve hydration and barrier function. Available patch-test and consumer-use data generally show low irritation potential, but as a functional humectant blend component it can still sting on severely compromised or eczematous skin, especially when layered with other actives. For patient safety in highly reactive populations, it fits best as very gentle rather than inert. Safety Notes: In commercial moisturizers, serums, and cleansers, xylitylglucoside is most often present as part of the Aquaxyl humectant complex (xylitylglucoside/anhydroxylitol/xylitol), where the complex is typically used around ~0.5–5% and xylitylglucoside consequently appears from trace/labelable levels (~0.05–0.2%) up to low single-digit percentages. The low end is observed in multi-humectant formulas (especially rinse-off) where it functions as a minor component, while the high end (~2–3%) occurs in high-hydration leave-on products that push the Aquaxyl complex toward the upper end of typical supplier use levels; higher consumer-market levels are uncommon due to diminishing returns and formula feel/stickiness constraints rather than regulatory limits.