Studies have shown that both To The Root and Not Today, Grey are effective on men and women, and on all hair colors. They’ve also confirmed that they are more effective during early stages of the greying process: the less grey hair, the easier it is to slow and re-pigment.

Not Today, Grey – Qualitative Study

30 participants

3 months of use

ages of 30-53

67% female

33% male

all with <25% grey


reported their hair felt more vibrant and healthy


saw less grey hair growth


said their hair felt thicker, fuller and smoother

To The Root - Main Ingredient Consumer Study*

140 participants

3 months of use

ages of 21-70

59% female

41% male

all with <30% grey


reported healthier hair overall


reported less grey hair growth


saw roots growing in darker

*External study conducted using the Palmitoyl Tetrapeptide-20 Amide

In a clinical study conducted on 15 men age 18-35 using the Palmitoyl Tetrapeptide-20


grey hair density decreased
an average of 30% - up to 81%