When skincare companies produce products with, for example, bakuchiol, they typically extract the active ingredient from the seeds and leaves of the Bidens Pilosa plant and then formulate it into their products. Here's a closer look at how this process usually works:

1. Extraction and Purification:
   - Extraction: The bakuchiol is extracted from the plant material using methods such as solvent extraction or supercritical fluid extraction. This process isolates the bakuchiol compound from the other plant components.
   - Purification: The extracted bakuchiol is then purified to ensure that it is concentrated and free from unwanted residues or impurities.

2. Formulation:
   - Combining with Other Ingredients: Once extracted and purified, bakuchiol is added to skincare formulations. These formulations may include a variety of other ingredients, such as emulsifiers, stabilizers, preservatives, and fillers, to create the final product.
   - Preservatives: These are added to extend the shelf life of the product and prevent microbial growth. Common preservatives include phenoxyethanol, parabens, and natural alternatives like ethylhexylglycerin.
   - Fillers and Carriers: These are used to ensure the product has the desired texture, stability, and application properties. Fillers might include water, oils, or butters, while carriers might be substances that help distribute the active ingredient evenly throughout the formulation.

3. Labeling and Marketing:
   - Companies often highlight bakuchiol as a key active ingredient due to its popularity as a natural alternative to retinol. However, the concentration of bakuchiol can vary between products.
   - It is important to check the ingredient list and product claims to understand the actual content and concentration of bakuchiol in a given product.

4. Quality and Efficacy:
   - The efficacy of bakuchiol products depends not only on the concentration of bakuchiol but also on the overall formulation. A well-formulated product will ensure that bakuchiol is delivered effectively to the skin and works synergistically with other beneficial ingredients.
   - Higher-end or reputable brands may invest more in research and development to create formulations that enhance the stability and effectiveness of bakuchiol.

5. Regulations and Standards:
   - Companies must comply with cosmetic regulations in their respective markets. This includes listing all ingredients on the product label in descending order of concentration.
   - Transparency about ingredient sourcing and formulation practices can vary between brands, with some providing more detailed information than others.

In summary, while bakuchiol is extracted and added to skincare products, it is usually combined with various other ingredients to create a stable and effective final product. The use of fillers and preservatives is a standard practice in the skincare industry to ensure product stability, safety, and efficacy. Consumers should read labels and research products to make informed choices about the skincare products they use.