Watery Lotion/Toner for Brightening & Pore Tightening: Shelf Life & Formulation

Hello,

Regarding the watery lotion formula you are interested in making for morning and evening use, targeting pore tightening and skin brightening for normal skin:

The team confirms that the ingredients you have selected can be mixed together, as has been confirmed in the thread.

The ingredients you chose contribute to your desired results as follows:

• Safe-B3 (Niacinamide): An excellent ingredient for improving the appearance of pores, evening out skin tone, brightening, and strengthening the skin barrier.
• GlucoBright (N-Acetyl Glucosamine): Enhances skin brightening and provides hydration.
• Azelaic Acid (Water Soluble): Helps with skin brightening and can improve skin texture.
• Double Hyaluron Liquid: Provides hydration to the skin, making it look plump and healthy.

Regarding the shelf life of homemade products, based on the information provided by endorphinism and the Staff team in the thread, the inclusion of preservatives like Phenoxyethanol (0.3%) along with 1,2-Hexanediol (3%), which also has preservative-boosting properties, is sufficient for microbial control for small-batch personal use.

If mixed hygienically and stored properly, the shelf life for personal use should be quite long (generally expected up to 2 years unopened, and around 6 months after opening, but this depends on various factors as mentioned). For commercial production, laboratory testing is required to confirm preservative efficacy.

Overall, the formula you have selected is interesting and contains ingredients that effectively address your goals for skin brightening and pore appearance.

If you have any further questions about any specific ingredient or wish to adjust the formula, feel free to ask!