Physical Sunscreen Formulation for Anti-Pollution and Skin Barrier Support

Creating a physical sunscreen with SPF50+ PA+++ that also protects against pollution, strengthens the skin barrier, and is suitable for sensitive skin involves selecting specific ingredients. Here's a breakdown of key components based on your requirements:

Core Sunscreen Actives

For a physical sunscreen, the primary active ingredients are Zinc Oxide and Titanium Dioxide. These minerals provide broad-spectrum protection against both UVA and UVB rays by physically blocking them. Achieving SPF50+ PA+++ requires careful formulation with appropriate concentrations and particle sizes of these ingredients.

Anti-Pollution and Anti-Adhesion

To help protect the skin from environmental pollutants like PM 2.5 and dust, ingredients with anti-adhesion properties are beneficial. Ectoine is known for its cell-protective and anti-pollution effects, helping to shield skin cells from environmental stress. Extracts from marine seaweed, such as Ascophyllum Nodosum Extract (containing Fucoidan and Fucose) and FucoCell (L-Fucose), can also contribute to protecting the skin from external aggressors and supporting skin health.

Skin Barrier Strengthening

Ingredients that support and repair the skin barrier are crucial for sensitive skin and for enhancing resilience against pollution.

• Niacinamide (Vitamin B3), like Safe-B3, helps strengthen the skin barrier, reduce redness, improve skin texture, and can help reduce oiliness.
• Centella Asiatica Extract (Cica), such as Pure-TECA CICA or Centella Asiatica Extract (Madecassoside 90%), is well-regarded for its anti-inflammatory and skin-healing properties, helping to soothe irritation and support collagen production.
• Ceramides, available in various forms like Ceramide Complex, Cerasoft, or Ceracare Liposome-3, are essential lipids that make up the skin barrier. Supplementing ceramides helps restore the barrier function, improve moisture retention, and reduce sensitivity.

Moisturizing Components

To ensure the sunscreen is hydrating and prevents dryness and irritation, incorporating effective moisturizers is important. This includes humectants that draw water into the skin and emollients that smooth and soften the skin surface.

Allergen-Free Formulation

As requested, the formulation should be free from common irritants such as fragrance, parabens, colorants, and artificial scents to minimize the risk of allergic reactions, especially for sensitive skin.

Note on Formulation and Cost

Creating a stable and effective sunscreen formulation with the desired SPF and PA rating, along with incorporating these beneficial ingredients, requires expertise in cosmetic chemistry. The exact percentages of ingredients and the specific formulation process will significantly impact the final product's performance, texture, and stability.

Regarding the cost for a 50ml product, it is not possible to provide an accurate estimate without a precise formula, the specific grades and suppliers of each ingredient, manufacturing costs, packaging, and other overheads. The cost of raw materials can vary widely depending on purity, source, and quantity purchased.

This information provides a guide to the types of ingredients you would include in such a physical sunscreen formulation focused on anti-pollution and skin barrier support for sensitive skin.