A 45 year-old tech executive's extreme longevity routine to age backwards involves taking over 100 daily supplements and waking up at 5 a.m.

• Entrepreneur Bryan Johnson shared details of his longevity routine at the Fortune annual tech conference.
• He said he takes over 100 supplements daily, and goes to bed by 8:30 p.m.

Tech entrepreneur Bryan Johnson is 45 but aiming to feel 18 again with an extreme and costly routine he hopes will help him age in reverse.

He spends $2 million per year on the intensive regimen, known as "Project Blueprint," which has involved infusions of blood from his teenage son, and over 100 daily protocols including dozens of supplements, dinner at 11 a.m., and an 8:30 p.m. bedtime.

The millionaire exec recently shared details of his day-to-day habits with Project Blueprint during Fortune Magazine's annual tech conference, and said he's not even a little tempted to squander the greater objectives of human existence by indulging in pizza or donuts.

"It makes me sick to think about it," he said.

Johnson's daily longevity routine reportedly involves:

• Waking up around 5 a.m.
• Measuring his body composition (fat and muscle mass)
• Drinking a preworkout smoothie and taking over 60 supplements, including creatine
• Hitting the gym for an hour, doing both cardio and weight training
• Eating a breakfast of something called "super veggies" (apparently aiming for a total of 70 pounds of veggies per year)
• Undergoing trendy treatments like red light therapy and ultrasound
• Having another meal, this one called "nutty pudding," and 40 more supplements, including cocoa flavonols
• Eating his third and final meal of the day by 11 am
• Working from 9 a.m. to 6 p.m., then spending two and half hours for "family time," relaxation, skincare, and dental care
• Going to sleep by 8:30 p.m.

While Johnson's routine is particularly detailed, attempts to turn back the clock on the human body aren't unique.

Other longevity seekers have said they've tried to reduce markers of biological aging, too. Doctor Mark Hyman, 63, said he has the health of a 43-year-old thanks to healthy aging habits like a daily smoothie, exercise, and stress reduction, he previously told Insider.

The current evidence is mixed on longevity strategies, many of which aren't yet supported by enough research to suggest they could be the fountain of youth. While it's true that good nutrition and regular exercise can help stave off disease and some age-related ailments, tests to determine biological age are still controversial.