Exclusive | These 4 trends can sabotage your health, biohacker warns including a faux-superfood that may increase man boobs

Blood boys.Butthole sunning.

Body modifications. There’s no stunt too bizarre for biohackers obsessed with extending their lives — but that doesn’t mean you have to turn yourself into a human guinea pig to get healthy.The Post sat down with Dave Asprey, the self-proclaimed “Father of Biohacking,” to get the inside scoop on the longevity fads flooding your feed that could seriously backfire if you’re not careful. Asprey is a fan of intermittent fasting.Heck, he literally wrote the book on it. But even the longevity guru says too much of a good thing can wreak havoc on your body.“People think, ‘Intermittent fasting is good, therefore, more is better,’ but you can break your metabolism like that,” he warned. When you fast for too long, Asprey explained, it can cause your levels of the body’s stress hormone, called cortisol, to spike.

That’s when the trouble starts. First, Asprey said, your sleep takes a hit.People often find themselves waking up more frequently during the night and missing out on deep rest. Next, women’s menstrual cycles can go haywire, while men may start waking up without a “kickstand” — and yes, that’s exactly what you think it means.Hair thinning is next on the list — and neither sex is safe from that one.“Your body will be stressed all the time,” Asprey warned.

“You’ve got to fast the right way for the state of your body.”So before you skip your next meal, take a beat.Asprey recommends factoring in your workout routine, sleep quality and any stress already piling up — or your quest for longevity might just leave you burnt out and balding.Cold plunges are also popular in the biohacking world, but Asprey said too much time in the tub can leave you more stressed than refreshed. Just like with fasting, staying in frigid water too long can put serious strain on the body — and send your cortisol levels through the roof.“Women need less cold plunge time and maybe even slightly warmer water t...