Please note

Vita.G has shifted its focus to working on BariBuilder. BariBuilder is a web application that makes it easy for patients to build customized bariatric vitamin regimens.

While we will continue to serve any and all customers, please know that our efforts for serving you better will be oriented around improving BariBuilder.

About us

Vita.G is family owned and operated. We understand how challenging it can be to make the decision to have surgery and then to go through the surgery process. Life after surgery can be just as challenging – especially if supplements are not given the attention they deserve.

Our Mission

Our mission is to make your post-bariatric-surgery life worry-free with comprehensive, easy to follow supplementation maintenance options.


Dr. Gintas ‘G’ Antanavicius, M.D.

Vita.G, LLC is a family owned and operated business. Vita.G was co-founded by Dr. Gintas “G” Antanavicius, M.D., an internationally renowned bariatric surgeon operating on the east coast of the US, along with his son, Tadas Antanavicius, a former Goldman Sachs software engineer and Penn Medicine Researcher. Dr. G has performed almost 2000 bariatric operations and published multiple research articles throughout his career. He finds it frustrating that post-surgery patients often have trouble finding suitable vitamins and supplements for their specific surgery’s needs, leaving them resorting to makeshift solutions or, at worst, being completely noncompliant.

And so Vita.G was born. For any products we offer, we want only the highest quality for our customers, so we work exclusively in partnership with FDA regulated US manufacturers.

As we grow, we will continue to expand our product line to cover more and more products and surgeries. We’re additionally actively working to use our experience, skillset, and relationships to build technology products that will improve the relationship bariatric patients have with their supplementation regimens.