What It Is and What It Isn't:
Here's the thing though, I think Calm Sexy Hair is great for styling your hair. So I would focus on using it for daytime. It's not a "treatment" oil (i.e. castor oil, etc.) that you would use on your scalp to promote hair growth. For some, it may be effective but Sexy Hair isn't promoting it as such and I wouldn't attempt to replace my tried and true growth focused hair oils with Calm Sexy Hair. However, it's great for adding a bit of hydration to end that need extra care!