Members’ exclusive: Liposomes – introduction to liposomes and other concepts.

In the January Q&A, Derek asked: I am eagerly waiting for the cosmeceuticals e-book. A few days ago while browsing different ingredients for cosmetics, I saw ceramide liposomes and retinol liposomes. It says that they absorb more in the skin if liposomes are used. However, I can’t find any resource on the use and formulation...

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Question: How can we add a cationic polymer to an anionic product, like shampoo, body wash, or facial cleansers?

I can’t remember who asked it where, but someone asked me: How can we add a positively charged or cationic ingredient like polyquaternium 7 or Honeyquat to a negatively charged or anionic surfactant blend, like a shampoo or body wash? Great question! Let’s recap a bit of the chemistry for a second. (Check out this … Read more

Member exclusive Q&A: What’s the best version of EDTA to use in gels?

In the December Q&A on the Patreon feed, Christina asked: Hi Susan, was wondering about EDTA. Would tetrasodium EDTA be best for gels like facial products with Sepinov EMT 10? I believe tetrasodium was for higher pH, but it also stated more suited for gels. But some facial gels aren’t necessarily higher pH. And would...

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Question: What is the meaning of positive or negative charge? Cationic, anionic, and non-ionic charges

In this post, How can we adapt our formulas to be more natural: Gelling agents, Catherin asked: What is the meaning of positive and negative charge? I wrote about this topic in this post on the blog – Anionic, cationic, and non-ionic – but I realized I’ve learned so much since 2011 and there are … Read more

Member exclusive Q&A: Do we need to adjust the pH of conditioners we make?

In the December Q&A, Camirra asked: I have a question about needing to adjust the pH of conditoners that are made with Incroquat BTMS-50, BTMS-25 or behentrimonium chloride. I read previously on your blog that conditoners made with this ingredient dont need to be pH adjusted. I read on your post that hair products need to...

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Member exclusive Q&A: Should we store our finished products in opaque containers or cool, dark places?

In the December Q&A, Christina asked: Hi Susan, was wondering between storing formulations in clear bottles, frosted and colored. Some ingredients say to store in a dark cool place. But if you’re only using 2-5% of the product, does that still apply? I have quite a few clear and frosted bottles that I haven’t used because...

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