6-Hydroxyindole vs Red 4
6-Hydroxyindole and Red 4 are both added colour ingredients. 6-Hydroxyindole is found in 4 products while Red 4 appears in 1, making 6-Hydroxyindole the more widely used option.
Added colour
6-Hydroxyindole
Added colour
4 products
Added colour
Red 4
Added colour
1 products
Top products with 6-Hydroxyindole
Top products with Red 4
Frequently asked questions
What is the difference between 6-Hydroxyindole and Red 4?
6-Hydroxyindole is categorised as "Added colour" while Red 4 is categorised as "Added colour". They serve different functions in skincare formulations.
Can I use 6-Hydroxyindole and Red 4 together?
In most cases, these ingredients can be used together. However, always patch test and introduce new ingredients gradually.
Which is more common in skincare products?
6-Hydroxyindole is found in 4 products, while Red 4 is found in 1 products in our database.