Amazon customers can’t get enough of this hair oil, with some calling it a “must” for damaged hair and split ends. They also love that you don’t need a lot of formula to get the job done. “3 drops ...

With these Wirecutter-approved picks under $100, you don’t have to spend a lot to get a good deal this Amazon Prime Day.

Split ends can be caused by various factors, including hair dye and bleach, dry air, sun exposure, heat styling, lack of hydration, and tight hairstyles.

Since products for hair growth and thinning hair vary wildly in efficacy, we researched and tested over 40 shampoos for thinning hair to find the best for various needs and conditions.