If you're looking for a customized formula that addresses one or many concerns, try Function of Beauty.
Function of Beauty develops personalized hair-care products, including a hair mask. At $19 for a 7.5 oz jar, it's expensive, but it's also a weekly deep-conditioning treatment that's catered specifically to your needs, so I think the price is justified. There's also an option to subscribe to regular deliveries of each product, so you'd never run out.
To create your custom formula, you'd have to take a short online quiz and indicate your concerns and needs. I said that I wanted to hydrate and repair my dry, heat-damaged hair. I have fine hair so I also wanted to make sure the formula wouldn't be too heavy and weigh it down.
A few weeks later, the mask arrived at my door and I've been using it twice a week for the past two months. In the two months that I've been using it, I've used about a quarter of the product.
It's definitely made my hair feel stronger and healthier, with a lot more shine than it used to have. While each formula is made specifically for your particular hair needs, it generally contains hydrating Japanese sake extract, and argan and jojoba oils.
It takes just a few minutes to work and it's easy to rinse out too. The one thing I'm split on is the plastic jar. I try to avoid plastic when I can, but I've dropped the jar several times in the shower and thankfully, it hasn't cracked or broken. Can you imagine what would've happened if it was made out of glass?
The Insider Reviews team has tested and reviewed other Function of Beauty hair-care products, here's the full review.
Pros: Personalized formula for your specific hair needs, has one-time or subscription option for flexibility
Cons: Is only available online