Serum Texture Feedback and Adjustment

Based on the provided serum formula, which aims for a non-oily, non-silicone, non-fragrance, non-color, and preservative-free product suitable for sensitive skin, here's an assessment of the texture and suggestions for adjustment:

Your previous serum was sticky due to the lack of emollients. The current formula includes LipidSoft Lite and Phospholipid, which are good additions to improve skin feel and reduce stickiness.

However, the high concentration of active ingredients, particularly Galactomyces Ferment Filtrate (15%) and Repair Activator (10%), combined with the gelling agent Pro Polymer (0.5%) and humectants like MOIST24 and 1,2-Hexanediol, could still contribute to a somewhat sticky or heavy feel on the skin, especially with the high percentage of water (35%). The description for Galactomyces Ferment Filtrate notes that high doses might feel greasy/oily.

To optimize the texture for a less sticky feel while maintaining efficacy, consider the following adjustments:

• Reduce Galactomyces Ferment Filtrate: The 15% concentration is quite high. Reducing it to a lower percentage (e.g., 5-10%) could significantly decrease any potential greasiness or stickiness without necessarily compromising the skin benefits. You can observe the texture change with gradual reduction.
• Evaluate Thickener Level: While 0.5% Pro Polymer is a low amount for a gel maker, its interaction with the high load of other ingredients is important. If reducing the Galactomyces Ferment Filtrate doesn't fully resolve the stickiness, you could experiment with a very slight reduction in Pro Polymer, ensuring the serum still maintains its desired consistency and stability.
• Balance Humectants: The combination of humectants like MOIST24 and 1,2-Hexanediol is excellent for hydration. However, if stickiness persists, a minor adjustment to the concentration of one or more humectants could be considered, keeping in mind the need to maintain adequate moisturization.
• Ensure Proper Mixing: Ensure that the Pro Polymer is fully hydrated and dispersed according to the manufacturer's instructions to achieve the intended gel structure without clumps, which can affect texture. Also, ensure LipidSoft Lite and Phospholipid are well incorporated.
• Leverage Penetration Enhancers: The inclusion of Dimethyl Isosorbide and 1,2-Hexanediol should help with ingredient absorption, which can contribute to a less sticky feel after application. Ensure these are properly integrated into the formula.

By carefully adjusting the concentrations of ingredients that significantly impact texture, particularly Galactomyces Ferment Filtrate, you can likely achieve a serum with a more desirable feel that is less sticky while still delivering the intended benefits for bright, smooth, healthy skin, suitable for sensitive skin.