Ingredients to Reduce Scalp Irritation and Itchiness in Shampoo

When formulating a shampoo to reduce scalp irritation and itchiness, several ingredients can be effective. These ingredients often work by addressing underlying causes like fungal growth, inflammation, or excessive oiliness.

Here are some options:

• Dandruff-Guard™ (Piroctone Olamine): This ingredient is effective against the fungus that causes dandruff and also helps to stop itchy scalp and reduce inflammation. It is typically used at 0.5-1.0% in anti-dandruff shampoos. Disperse it in water before adding to the shampoo base.
• Licorice Extract (Licochalcone A 1%, Water-Soluble): Known for its anti-inflammatory properties, Licorice Extract can help reduce skin irritation and redness. It can also help manage oily scalp. Use at 0.5-1.0% for reducing irritation and inflammation. It is water-soluble and can be mixed into the water phase.
• BioSulphur™ EQ (Water Soluble Sulfur): This ingredient helps reduce oiliness of the scalp and eliminate dandruff and itchy scalp. It is water-soluble and can be used at 1-10%, with 4-5% being a common recommendation for oily skin/scalp. Avoid using with Vitamin C.
• Dandruff-Clear™ (Hexamidine diisethionate): A fungicide and germicide that is positively charged, allowing it to adhere to the scalp even after rinsing. This makes it suitable for dandruff shampoos to provide continuous disinfectant action. Use at 0.1%. Disperse in water or glycol before mixing into the main formula.
• Dandruff-Care™ (Dichlorophenyl Imidazoldioxolan): An antifungal agent effective against dandruff and seborrheic dermatitis by inhibiting fungal growth and regulating sebum. Use at 0.1-2.0%. It is soluble in ethanol and propylene glycol; dissolve it in one of these before adding to the formula.
• Selenium Sulfide: This is an antifungal agent commonly used to treat dandruff and seborrheic dermatitis by slowing fungal growth and reducing skin cell turnover. For cosmetic use, the maximum allowed concentration is 1%. It is insoluble in water and should be pre-slurried in a primary anionic surfactant before mixing.

Choosing the best ingredient depends on the specific cause of the irritation and itchiness. Some ingredients target fungal issues (like dandruff), while others focus more on inflammation or oil control. You may also consider combining compatible ingredients for broader efficacy. Always follow recommended usage rates and mixing instructions for each ingredient.