The oldest millennials are now 38 years old. TikTok is full of memes mocking the youngest ones staring down the barrel of their 30s, and they can serve as a humbling reminder that knee problems are just the tip of the iceberg when it comes to changing health concerns. We caught up with Dr. Jake Deutsch to understand what the most commonly overlooked health concerns for millennials are, and what advice he had for incorporating manageable changes that can help lead a healthier life. A Little Bit Better is a new series from Bustle exploring research-backed ways you can level up your life by creating attainable habits and manageable routines.