Liam Day
Chemist
Liam Day is a chemist at BRST specializing in the science of nicotine delivery and product formulation. He writes BRST’s format and science pages, examining how nicotine moves from products such as pouches, gum, and tablets into the body—and the factors that determine how much, how quickly, and under what conditions it is absorbed.
His work focuses on the chemistry behind the label: formulation, dissolution, absorption, delivery kinetics, and the ways product format can influence nicotine exposure. He brings a scientific perspective to questions that are often reduced to a single number on a package, emphasizing the distinction between stated nicotine content and what the body actually receives.
Liam is a chemist, not a physician. His role is to explain the underlying science clearly and rigorously, helping readers understand what the chemistry can—and cannot—tell us.
