Formulation for Acne and Dark Spots on Face and Body (Water-Lotion Texture)

Subject: Formula Review for Acne and Dark Spots (Face & Body)

Thank you for sharing your formulation for acne and dark spots, intended for use on both the face and body (buttocks and groin area) with a non-sticky water-lotion texture.

The selection of active ingredients such as Azelaic Acid, Willow Bark Extract (Natural Salicylic Acid), Safe-B3™ (Niacinamide), and Lemon Peel Bioferment is excellent and well-suited for addressing both acne and hyperpigmentation concerns on various parts of the body. The inclusion of soothing agents like Oat Avenanthramides and the Witch Hazel/Allantoin base is also beneficial.

Regarding your specific questions:

• AnyGel™ (Dehydroxanthan Gum) at 0.30% for viscosity: 0.30% of Dehydroxanthan Gum is a reasonable starting point for achieving a slight viscosity in a water-based formula, suitable for a "water-lotion" texture. Dehydroxanthan Gum is known for providing a good, non-sticky feel compared to some other thickeners. The final viscosity will depend on the interaction with other ingredients and the formulation process, but this percentage should provide a noticeable, light thickening effect.
• Reducing stickiness for body use: Your formula already includes ingredients like Methyl Gluceth-10, WaterLube™ Slip, and VersaMoist™ which are designed to improve the skin feel, enhance slip, and reduce tackiness in aqueous systems. These are good choices for achieving a less sticky feel, especially important for body application. If you find the final texture is still too sticky for your preference on the body areas, you could consider slightly increasing the percentage of WaterLube™ Slip or Methyl Gluceth-10. These ingredients are specifically aimed at improving the light, non-tacky feel and spreadability. Be mindful of the total percentage of ingredients when making adjustments.

The inclusion of Dimethyl Isosorbide (DMI) is good for enhancing the penetration of the active ingredients. Odor-Kill™ is included, which serves a deodorizing purpose, although less common in this type of product, it's acceptable if needed.

Overall, this is a well-thought-out formula with appropriate ingredients for the stated goals. Adjusting the feel modifiers slightly might be necessary based on your desired final texture for body application.