Mutagens (The Witcher 3: Wild Hunt)

Ty3uK_4ak
I haven't found one like this more than once, is it even in the game?

Mutagens only blue, red and green

And what to put in a cell that enhances the restoration of health, increase in health, etc.?

Yes, this question also came up. I thought you would find it further along the passage, but I realized that it was not right.