Zinc Oxide

Zinc Oxide (ZnO) is an inert, white, mineral powder used in skincare for its skin-protecting and soothing properties. In EU cosmetics it’s also an approved UV filter (up to 25%) — though unless you test and label SPF, treat it as a comfort-and-protection ingredient, not a sunscreen claim.EUR-Lex

1) Soothes irritated skin

Human data show topical ZnO can attenuate visible redness around small standardized wounds versus placebo (randomized, double-blind design). Mechanistically, bioactive Zn²⁺ ions have anti-inflammatory/“anti-phlogistic” effects in skin. Translation for everyday care: ZnO is a calm, comforting add-in for stressed skin.PMC

2) Creates a protective, moisture-shielding barrier

Healthcare guidance for nappy rash consistently recommends barrier creams that contain zinc oxide to protect skin from wetness and friction — a simple, effective strategy for delicate areas. Paediatric hospital guidance even notes that higher-strength ZnO (e.g., ~40%) can help when milder barriers aren’t enough.nhs.ukRoyal Children's Hospital

3) Supports barrier recovery (TEWL improvement in use)

In a pediatric study of irritant diaper dermatitis, an ointment containing zinc oxide + dexpanthenol reduced transepidermal water loss (TEWL) more than base alone by day 3, indicating better barrier function during recovery. (Multi-ingredient, but aligns with ZnO’s role as a skin protectant.)PubMed

4) Helps keep problem bacteria in check (deodorant-area data)

A randomized, double-blind study found ZnO reduced Corynebacterium (odour-associated bacteria) and lowered self-perceived malodour in the underarm. While not the same as diaper care, it supports ZnO’s gentle antimicrobial contribution to calm, comfortable skin.PMC

• EU UV-filter status:Non-nano and nano ZnO are permitted up to 25% as UV filters in cosmetics, except in applications that may lead to lung exposure by inhalation (e.g., sprays/aerosols). In a cream/balm, this restriction isn’t triggered.EUR-Lex
  
• Nano labelling: If a formula uses nano-sized ZnO, EU law requires “Zinc Oxide [nano]” in the INCI list (Article 19). If you use non-nano grades, list simply Zinc Oxide.Internal Market & SMEs
  
• Sprays/aerosols: EU safety opinions state ZnO nanoparticles in sprays can’t be considered safe due to inhalation risks; again, not relevant to a leave-on cream.European Commission
  
• Everyday skin protectant: In the US, ZnO is recognized in the OTC monograph as a skin protectant (incl. diaper rash) at specific ranges — useful background confirming its long clinical history.FDA Access DataDailyMed
  

Natural Nine positioning: We use cosmetic-grade ZnO in a leave-on cream, not a spray. It’s there to soothe, shield from wetness/friction, and support barrier comfort — especially for sensitive, nappy-area skin.

• Forms a gentle shield: ZnO sits on the surface to seal out excess moisture and reduce friction.
  
• Plays well with our base: Beeswax adds a breathable film, shea and oils soften, arrowroot cuts greasiness — together delivering a newborn-gentle feel that calms easily upset skin.