Underarm Serum Formulation Review

This looks like a well-rounded formulation designed to address multiple underarm concerns, including whitening, smoothing, reducing chicken skin, and deodorizing, while aiming for low irritation.

Here's a breakdown of the ingredients and their potential benefits based on your list:

• Water: The base of your serum.
• Allantoin: Known for its soothing and anti-irritant properties, helping to reduce redness and promote skin healing.
• Aloe Vera Extract: Provides moisture and helps to calm irritated skin.
• Shiso Extract: Offers anti-inflammatory benefits and can help stimulate microcirculation.
• Japanese Cedar (Cryptomeria Japonica Bud Extract): Supports skin cell turnover and strengthens the skin barrier, contributing to smoother, healthier-looking skin.
• GlucoBright™ (Acetyl Glucosamine): A key whitening ingredient that also helps reduce dark spots, gently exfoliates, and boosts skin hydration by stimulating hyaluronic acid production. It works synergistically with Niacinamide.
• Safe-B3™ (Vitamin B3, Niacinamide): Another excellent ingredient for reducing hyperpigmentation (dark spots/redness), strengthening the skin barrier, improving skin texture, and controlling oiliness. The Safe-B3™ type is noted for its high purity, reducing the risk of flushing.
• Rhamnose: Has properties that can inhibit the growth of odor-causing bacteria and reduce inflammation. It may also help improve skin density and stimulate collagen.
• DeoMax™ Liquid: An effective natural deodorizer derived from Japanese persimmons, targeting various body odors.
• Satin Cream Maker™ or Light Cream Maker™: These are emulsifiers and thickeners that will give your serum its texture. Satin Cream Maker™ can handle slightly more oil and is more electrolyte resistant.
• Flora Fix™ and น้ำหอมสำเร็จรูป Mint & Easy: These provide the fragrance.
• Mild Preserved Eco™: Acts as a gentle preservative alternative and also helps control odor-causing bacteria.

Mixing Instructions

For a serum formulation like this, you would generally follow these steps:

1. Combine the water phase ingredients (Water, Allantoin, Aloe Vera Extract, Shiso Extract, Japanese Cedar, GlucoBright™, Safe-B3™, Rhamnose, DeoMax™ Liquid). Stir until all soluble ingredients are dissolved. Gentle warming (e.g., up to 40-50°C) can help dissolve some powders like Allantoin or GlucoBright™ faster, but avoid prolonged high heat, especially for extracts and vitamins.
2. If using Light Cream Maker™, you might need a small oil phase to mix it into first before combining with the water phase. If using Satin Cream Maker™, it is typically added directly to the water phase.
3. Add the chosen Cream Maker (Satin or Light) to the water phase and mix according to the manufacturer's instructions until the desired serum/light cream texture is achieved. Avoid excessive high-speed mixing which can damage the polymer.
4. Once the base is formed and cooled (if heated), add the Mild Preserved Eco™, Flora Fix™, and น้ำหอมสำเร็จรูป Mint & Easy. Mix gently until evenly dispersed.
5. Check the pH and adjust if necessary to be within the optimal range for the ingredients (generally between 4.0-7.0 for Safe-B3™ and GlucoBright™, and 5-9 for Rhamnose, so aiming for pH 5-6 would be ideal).

Increasing Fragrance and Flora Fix™

Increasing the percentage of fragrance (น้ำหอมสำเร็จรูป Mint & Easy) and Flora Fix™ can potentially cause skin irritation and lead to post-inflammatory hyperpigmentation (darkening), especially in a sensitive area like the underarms. Fragrance is a common irritant. While the current percentages might be acceptable, significantly increasing them raises the risk. For a non-irritating underarm product, it is generally best to keep fragrance levels as low as possible or use fragrance-free options.

If you desire a stronger scent, consider using the current percentages first and test for sensitivity. If you need to increase, do so gradually and watch for any signs of irritation. Alternatively, look for fragrance compounds specifically designed for sensitive skin or leave them out entirely and rely on the natural scent control ingredients like DeoMax™ Liquid and Mild Preserved Eco™.

Ingredients for Reducing Chicken Skin

Several ingredients in your proposed formula can help improve the appearance of "chicken skin" (keratosis pilaris) by improving skin texture and promoting healthy skin cell turnover:

• GlucoBright™ (Acetyl Glucosamine): Provides gentle exfoliation and improves skin texture.
• Japanese Cedar (Cryptomeria Japonica Bud Extract): Enhances skin cell turnover and strengthens the skin barrier, leading to smoother skin.
• Safe-B3™ (Vitamin B3, Niacinamide): Strengthens the skin barrier and can improve overall skin texture.
• Allantoin and Aloe Vera Extract: Help soothe the skin and support the regeneration process, which can indirectly contribute to smoother skin over time by reducing inflammation that might exacerbate the condition.

This formulation includes good ingredients for addressing the multiple concerns you have for an underarm serum.