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URprospector video: concentration and No extra preservatives
Hi everyone, it has been a while but having a full-time startup lets me almost no free time to read formulation posts. I wish that will change some day :S
I receive a video from ULprospector talking about customized products
https://www.youtube.com/watch?v=bqB-vh-ijw
2 question came to my mind:
1- the used active ingredients concentrations are really high in the actives formulation. Are they risky? are they legal in US? Here at the EU most of the cosmetic active ingredients have no limitation (even retinol has only a RECOMMENDATION of a maximum of 0.3%)
For example, the second active ingredient (liftoning perfect) shows in their data sheet patch test at 20%, but she used a 50% concentration… Did her their own test? I doubt it
2- She talks about preservation here at 6:42:
https://youtu.be/bqB-vh-ijw?t=6m42s
Belinda says that no more preservatives are needed. What is the reason behind this?
I mean, no adding extra water to a well-preserved product could be the answer but my doubt is: this is 100% sure?Regards from Spain
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