(Bloomberg) — Obesity is weighing on the economy.

As a panel of scientists considers ways to help Americans trim down, unpublished research shows medical expenses linked to being extremely overweight have skyrocketed. Experts say the damage is augmented by reduced productivity, wider gender and income inequality and even higher transportation costs.

While the biggest consequence is still on an individual's well-being, "there are some significant economic costs associated with obesity," said Ross Hammond, a senior fellow in economic studies at the Brookings Institution in Washington. "Unfortunately, it's not an outcome that's rare anymore."