US-based hair care brand Fleuria Beauty will launch a groundbreaking luxury hair growth and repair serum that has the internet buzzing—so much, there currently stands a 20,000-person waitlist for its Active Botanical Hair Growth Serum and a needed password to purchase them.     “It takes over six months to make one batch of our hair growth serum due to the labor-intensive process of cultivating and extracting the oils we use in our formulations,” said Seraphina de Fleur, the brand’s founder....