No mystery formulations. No mass production. Each individually handcrafted.

Just you, choosing what goes on your skin.

Our Build Your Custom Serum system lets you create a formula from the ground up by choosing the ingredients and percentages you want. Pick the oils and active ingredients that match your skin goals, whether that’s glow, hydration, barrier support, calmness, or overall skin renewal. Then we freshly make your formula to order in our lab and ship it directly to you.

At Cosmocost you can expect:

Fully Customizable Formulas: Create a serum tailored specifically to your skin by choosing your own ingredients and exact percentages.

Complete Transparency: See how much of each ingredient is used. No “proprietary blends,” hidden amounts, or label tricks.

Made Fresh to Order: Your formula is handcrafted after you order it for peak freshness. We do not warehouse pre-made inventory or old stock.

Direct-From-Manufacturer Pricing: You are buying directly from the lab that formulates and produces your skincare, cutting out middlemen and unnecessary markups.

Meaningful Ingredient Levels: We don’t use trendy ingredients at trace “marketing” amounts just so they can appear on a label. Every ingredient we offer is available at levels intended to actually work. When clinical research supports a specific usage percentage, we offer that percentage so you can build formulas based on real data, not hype.

Professional-Grade Ingredients: We source the same types of high-quality ingredients used in premium skincare formulations without the luxury-brand markup.

Freedom to Experiment & Evolve: Found a formula you love but want a little more hydration or antioxidant support? Adjust percentages over time and refine your serum as your skin changes.

Unlimited Formulas: Instead of choosing from a few fixed products, you can build something that truly fits your preferences and goals.