Sample Sulfate-Free Shampoo Formulation Guideline

Here is a sample guideline for a sulfate-free shampoo formulation using the ingredients you listed. Please note that these are typical starting ranges, and the exact percentages may need to be adjusted based on desired viscosity, foam level, and performance through testing.

Will this formula have foam?
Yes, Sodium Lauroyl Glutamate is a surfactant that will produce foam.

Do I need to add or remove anything?
The formula you proposed is a good starting point. However, you might consider adding:

• Secondary Surfactant (like Cocamidopropyl Betaine): Adding 5-10% of a secondary surfactant like Cocamidopropyl Betaine can significantly improve foam quality, stability, and mildness.
• pH Adjuster: Shampoo formulations typically need to be adjusted to a slightly acidic pH (around 5.0-6.0) for optimal hair and scalp health, as well as product stability. A Citric Acid solution is commonly used for this.
• Other Actives: Depending on desired benefits, you could add humectants (e.g., Glycerin), specific herbal extracts, vitamins, etc.

Is Cocamido (Cocamidopropyl Betaine) necessary?
While not strictly mandatory, Cocamidopropyl Betaine is highly recommended in sulfate-free formulations. It acts as a foam booster, helps stabilize the lather, and can reduce potential irritation from other surfactants, resulting in a milder shampoo with better performance. If you want richer, more stable foam and a milder product, adding Cocamidopropyl Betaine is beneficial.