There are dozens of apps and online courses that claim their “brain training” can make you more mentally agile, but there’s usually little scientific evidence to back up those claims. While the FDA does approve certain brain training programs aimed to treat specific medical disorders, such as Alzheimer’s, and the FTC goes after false advertising claims–as it did when Lumonsity made claims not supported by science–there’s also no industry body that certifies brain training programs, which is a problem for both the field and consumers, according to Dr. Henry Mahncke, CEO of Posit Science.