If you haven’t been following the biohacking mania, there are 24 viral seconds of Bryan Johnson on TikTok that are a good place to start. As the video begins, he turns longingly to his then-17-year-old son. “I’m feeling a little low,” he says as the two sit side by side, shirtless, arms extended, phlebotomist-style. The teen makes a fist and (with the help of a few sci-fi video tricks) a metallic compartment in his forearm opens, revealing a vial of blood. “I got you, Dad,” he replies, taking it and handing it to his father.
The clip, posted in April, is a play on a real-life plasma infusion Johnson, 47, got from his son—one of his many attempts to reverse aging at all costs, which for him, apparently runs $2…
