Science-backed skincare guides created by a chemical engineer.
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Last updated on 21 May, 2025
Reviews
5.0
(6)
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We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.
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melina on 22 Feb, 2026
5 out of 5 starsExcellent and very detailed I cannot wait to try these simulations. The book is well written!
ashley responded on 23 Feb, 2026
Thank you so much. I am really glad you found it detailed and helpful. I would love to hear how your simulations turn out once you start testing. Wishing you great results in the lab!
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Etsy buyer on 26 Jan, 2026
5 out of 5 starsI have been loving reading this. I am wanting to figure out a shampoo bar and this has been excellent to understanding what it should have. This has given me a great foundation. It is also easy to find different sections if you are wanting to pounce around to understand something better.
ashley responded on 26 Jan, 2026
Thank you so much for sharing this. I am really happy to hear that the guide helped you build a clear foundation and find what you needed easily. That means a lot to me.
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Selina on 09 Mar, 2026
5 out of 5 starsWonderful resource...clearly. laid out easy to follow. Just what i needed and will return to it time and time again. Love formulas and excited to try out the eye oils..
ashley responded on 09 Mar, 2026
Thank you so much, Selina! I'm really glad the guide was helpful and easy to follow. I’d love to hear how the eye oil formulas turn out for you.
About SwonLab
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23
On Etsy since 2025
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ashley
Owner
Hi! I'm Ashley Denise – a chemical engineer and skincare formulation expert. I create science-backed DIY guides for beauty lovers and indie brands who want more than just pretty packaging. Let’s bring the science to your skincare.
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Last updated on 21 May, 2025
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