Biological age tests: Should you get one?

If you’ve heard of billionaire Bryan Johnson, you’ve likely encountered the phrase “bio age testing.”

Johnson, the subject of the Netflix documentary Don’t Die, says he’s on a quest to achieve the lowest possible “biological age” (also known as bio age).

He reportedly spends millions each year on anti-aging treatments—dozens of daily supplements, weekly acid peels for his skin, injections to boost collagen production, hyperbaric oxygen therapy, and plasma infusions extracted from his 17-year-old son’s body.

To determine what’s working, Johnson has undergone numerous tests to assess his bio age. Johnson says these tests show his age is now 5.1 years younger than when he embarked on his anti-aging…