Four years ago David Segal was your average twentysomething with a zen for tea.

Now he's the co-founder of a nationwide retail chain that sells tea in dozens, if not hundreds, of different blends and he is encouraging people to get steeped in its culture.

But what is the difference between white, green, and black tea and a good old cuppa?

"If I had an apple and I took a bite out of it and I left it on counter, it would turn brown. That is oxidation. With black tea that is exactly the case," said Segal.

Black tea oxidize all the way. Green tea they stop it right away either with steam or dry heat. White tea is just the buds, and they pick it at the beginning of the season and lay it out to dry."

Watch the full interview above.