Online reviews of Hairfinity vitamins indicate that the products help to improve the strength and thickness of hair. Customer reviews of Hairfinity vitamins are available on Amazon.com and HighYa as of 2015.
Hairfinity capsules are formulated with a variety of vitamins and minerals that promote the growth and maintenance of healthy hair, according to the product's website. A number of reviews of the product on Amazon.com indicate that the Hairfinity provides positive results when taken according to the instructions. Some reviews on Amazon.com and HighYa also note that the product occasionally causes side effects such as acne, headaches or digestive upset.