As millennials begin to turn 40 in 2021, CNBC Make It has launched Middle-Aged Millennials, a series exploring how the oldest members of this generation have grown into adulthood amid the backdrop of the Great Recession and the Covid-19 pandemic, student loans, stagnant wages and rising costs of living.

Every morning, Kristin Bennett starts her day off by swallowing about 14 different supplements and vitamins designed to help her keep the worst symptoms of her disease at bay.