Kat Schneider quit her VC gig while pregnant so she could launch a vitamin brand for the Instagram generation. Now her $125 million startup, Ritual, is facing its biggest test.

· On Tuesday, female-focused vitamin startup Ritual announced that it was launching a men's daily multivitamin in its latest attempt to upend the $123 billion vitamins and supplements market.
· Founder and CEO Katerina Schneider told Business Insider that the company is also planning to expand into supplements for children and...