retinaldehyde cost and concentration
I’ve been using a retinaldehyde serum that’s stronger than my retinol cream. I like the results so far but it is on the expensive side. I noticed that other retinaldehyde creams and serums online are on the more expensive end as well.
Has anyone here ever worked on a retinaldehyde product?
If so, is it in fact a more expensive ingredient to incorporate?
Also, what concentration is best?
Thank you 🙂
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