Oil Serum Formula Review and Home Mixing Guide

Regarding the formula you provided, here are the answers to your questions:

1. Can this formula be mixed at home?
   Yes, this formula appears feasible for mixing at home. Since it is an oil-based formula and most ingredients are soluble in oil, the mixing process is relatively straightforward. However, home mixing requires clean equipment and accurate measurement (preferably by weight) to ensure the quality and safety of the final product.

2. Should anything be adjusted (reduced or increased) in the formula?
   The percentages you listed seem reasonable for an oil-based serum. Rose Hip Oil is a good base oil, and Dimethyl Isosorbide helps enhance skin penetration. Other ingredients like Vitamin E, Bakuchiol, Retinyl Palmitate, and Ubiquinone are at common usage levels in skincare products. Mild Preserved Eco at 0.5% is also within the appropriate range for preservation in this type of formula.
   The slight total percentage over 100% (100.1%) is negligible.
   Therefore, based on the list of ingredients and percentages provided, no obvious adjustments are necessary. However, professional formulation considers more complex factors such as long-term stability, ingredient compatibility, and optimal efficacy, which may require further testing.

3. If it can be mixed at home, how should the ingredients be combined?
   To mix this formula at home, follow these steps:

   • Prepare Equipment: Ensure all equipment to be used is clean and dry (e.g., beaker, stirring rod, container).
   • Measure Ingredients: Measure all ingredients according to the desired percentages. Using a precise scale for weighing is recommended for accuracy, especially for small quantities.
   • Combine Ingredients: Start by weighing the Rose Hip Oil into a mixing container. Then, gradually add all other ingredients: Dimethyl Isosorbide, d alpha Tocopherol, Bakuchiol, Mild Preserved Eco, Retinyl Palmitate, and Ubiquinone.
   • Mix Thoroughly: Use a stirring rod or a small mixer (if available) to mix all ingredients thoroughly. Continue stirring until all ingredients are dissolved in the oil and the mixture is uniform with no residue (Ubiquinone might take a little longer to dissolve or may require gentle warming if it doesn't dissolve easily, but at 0.1% and with Dimethyl Isosorbide, it should dissolve without much difficulty).
   • Package: Once the ingredients are well combined, pour the mixture into the prepared container and seal it tightly.

Additional Tips:

• Store the finished product in a cool place away from direct sunlight to help maintain the quality of the ingredients, especially vitamins and antioxidants.
• Before applying to your face, it is advisable to test the product on a small area of your forearm to check for any allergic reactions or irritation.