The Index

Are collagen peptides worth taking for your skin? What the meta-analyses actually found Supplements Promising Are hyperbaric oxygen therapy chambers worth it for recovery and longevity? Devices Thin Do cold plunges actually work, and what for? Devices Promising Do continuous glucose monitors help people without diabetes? Devices Promising Do greens powders actually do anything? Supplements Thin Do microbiome skincare serums actually work? Skin Promising Does ashwagandha actually lower stress and cortisol? Supplements Promising Does bakuchiol actually work like retinol? Skin Promising Does creatine do anything besides build muscle? The evidence on cognition, aging and recovery Supplements Promising Does EBOO (extracorporeal blood oxygenation and ozonation) actually do anything? Treatments Thin Does fish oil (omega-3) actually help your heart or brain? Supplements Contradicted Does melatonin actually help you sleep, and is a lower dose better? Supplements Well established Does niacinamide actually do anything for your skin? Skin Well established Does red light therapy actually work — and what dose did the studies use? Devices Promising Does retinol actually work, and how is it different from prescription retinoids? Skin Well established Does the Oura ring actually measure anything useful? The accuracy of consumer sleep and recovery trackers Devices Promising Does the Whoop band actually measure recovery and strain accurately? Devices Promising Does vitamin C serum actually brighten skin and fade dark spots? Skin Promising Does vitamin D supplementation do anything if you're not deficient? Supplements Contradicted Does whole-body cryotherapy actually do anything? Devices Thin Is an infrared sauna actually good for you? What the cardiovascular and recovery research says Devices Promising Is magnesium glycinate worth it for sleep? Separating the hype from the trials Supplements Promising Is microneedling worth it for skin texture and scars? Treatments Promising Is the NAD+ IV drip worth it? What longevity clinics are selling versus what the evidence shows Treatments Thin