'Real Housewife' Caroline Manzo in Princeton (PHOTOS)

Caroline Manzo, one of the stars of "The Real Housewives of New Jersey" on Bravo, was in Princeton on Saturday to promote her sons' newest venture, a calorie and caffeine-free, all natural health and energy drink.

Manzo's sons, Albie and Chris launched the drink, Blk, last spring after discovering the product last year at the food show in New York.

The Manzo sons and their mother were at on Saturday, along with dozens of other food and drink vendors who plied hundreds of attendees with speciality meats, cheeses, sauces, drinks and deserts.

McCaffrey's Supermarket began carrying Blk this week.

Blk is a Canadian spring water infused with fulvic acid, a natural nutrient-rich compound that has been used in alternative healing circles for centuries. 

The beverage's black color comes from a chemical reaction between the water and fulvic acid, and is part of the drink's allure.

The health and energy boosting benefits, however, is what keeps people drinking it, according to Albie Manzo. 

Fulvic acid is mined from prehistoric sediment and been dubbed a "miracle molecule." The list of ailments it is said to cure is endless and its medicinal history is timeless.Ayervedic medicine calls it shilajit (or salajeet), a rejuvenating agent believed to have anti-inflammatory, anti-anxiety and anti-aging properties. 

In western medicine, fulvic acid is being investigated as a treatment for rheumatoid arthritis, fibromyalgia, thyroid conditions, diabetes, eye problems, ulcers, AIDS, cancer and a host of other conditions.

Reporting on blkbeverages by Rebecca K. Abna.