Flex property justify-content: flex-start not working in unordered list (ul)

Question

Why won't the items justify-content: flex-start within the ul? Please help! https://findmyreleaseliner.vfideacenter.com/product-category/medical/

#left-area ul.products {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: flex-start;
  width: 100%;
}