The Biohacking Knowledge Hub
Biohacking Guides on Sleep, Sauna, NAD+ & Longevity
Longevindex is an evidence-rated reference for biohacking: sleep, sauna, cold exposure, NAD+, glucose monitoring, and the rest of the longevity stack. Each guide states what the research supports, then links the equipment on Amazon when a product is worth buying.
Information First
Science, protocols, experiences, and risks. The complete picture before you spend a dollar.
Evidence-Rated
Every claim tagged: strong, moderate, emerging, or anecdotal evidence
Trusted Sources
When you're ready to buy, we link to vetted retailers. Clearly disclosed, never pushy.
187
In-Depth Guides
11
Topics Covered
140
Equipment References
55+
Quick Protocols
Available on Amazon
Start With These
Books and everyday supplements you can order on Amazon today. As an Amazon Associate we earn from qualifying purchases.
Gear Decisions
Buying Guides & Comparisons
Five comparisons with a verdict and a checked price: sleep cooling, a water filter, red light, and a cold plunge.
Sleep OptimizationBedJet vs Sleepme: Room Air vs a 55°F Mattress Pad
Buy the BedJet 3 if the bedroom already stays under about 79°F and you want heat plus a breeze, with no water tank. Buy the Sleepme Dock Pro if you need the mattress surface colder than the room. On 6 November 2026, bedjet.com listed the BedJet 3 at $437 on sale ($699 list). sleep.me listed the Dock Pro from $1,019 on sale ($1,199 list). Amazon prices move. BedJet cannot cool air below the room, because it has a fan and a heater, not a compressor.
Read guide
Sleep OptimizationBedJet vs Sleepme vs Eight Sleep: 3-Year Cost and What Canceling Costs
Buy BedJet if the room is already cool and you want a one-time air unit. Buy Sleepme Dock Pro, the current Chilipad, if you want a 55°F water pad and no membership. Buy Eight Sleep only if you will keep paying for Autopilot, because canceling it leaves manual temperature on an expensive cover. On 6 November 2026: BedJet 3 was $437 on sale ($699 list), Dock Pro started at $1,019 on sale ($1,199 list), and Eight Sleep listed a Pod 4 queen cover and hub at $2,599 before Autopilot. Standard Autopilot is $199 a year. Three years of that plan on the $2,599 cover is about $3,200, and that is before a mattress.
Read guide
Tools & EquipmentAquaTru vs Waterdrop: $475 Countertop vs $849 Under-Sink
Buy the AquaTru Classic if you rent, move, or will not drill a faucet hole. Buy the Waterdrop G3P800 if you own the sink and you are tired of waiting on a countertop tank. On 6 November 2026 AquaTru listed the Classic at $475. Waterdrop listed the G3P800 at $849 on sale and $999 list. Over three years the Classic is still the smaller bill: about $130 a year in AquaTru filters versus about $160 a year in Waterdrop cartridges. Filters do not flip this into a savings. The clean tank does. AquaTru's own spec puts that tank at about three quarts.
Read guide
Light TherapyRed Light Panel vs Face Mask: Dose, Distance, and Which to Buy
Buy the Hooga HG300 if the target is a joint, a muscle, or a cheap test of whether you will use red light. Buy the CurrentBody mask if the target is your face and you will wear it. They are not two prices for the same device. Hooga listed the HG300 at $199 in late October 2026. The mask in this catalog is the Amazon Series 1, 132 LEDs at 633nm and 830nm, usually $449–$549. Series 1 does not publish irradiance. CurrentBody's Series 2 does: 30 mW/cm², so a 10-minute session is 18 J/cm², and that mask was $469.99 on CurrentBody's US store on 1 November 2026.
Read guide
Cold TherapyPlunge vs Ice Barrel: $9,990 Chiller vs $1,150 Tub
Buy the Ice Barrel 300 if you already take cold showers, you can keep a 700-pound tub on a ground-level slab, and you will add ice. Buy the Plunge All-In only after that habit exists and $9,990 is an acceptable price for not hauling ice. On 6 November 2026 plunge.com listed the All-In Gen 2 at $9,990. Ice Barrel's store listed the 300 at $1,149.99 in mid-October 2026. A first fill is the cost people undercount: cooling 77 gallons from about 70°F to 50°F takes on the order of 80 pounds of ice. Plunge does not publish a wattage, so any monthly electricity figure is a guess.
Read guideStart Here
Essential Guides
Heat TherapyInfrared Sauna Guide: How Hot (120–170°F), Protocols & Picks
Regular sauna use is one of the strongest lifestyle interventions linked to reduced cardiovascular mortality in decades of Finnish research. This guide covers how infrared saunas work, Huberman and Rhonda Patrick's protocols, what you'll actually feel, the risks nobody mentions, and what 10,000+ Reddit users report.
Read guideCold TherapyHuberman Cold Protocol: 11 Minutes a Week and How to Plunge
Deliberate cold exposure is one of the most accessible biohacks with measurable effects on norepinephrine, dopamine, metabolism, and mental resilience. This guide breaks down the Huberman protocol (11 min/week), the Wim Hof method, what happens to your body, and how to build a sustainable practice.
Read guide
Light TherapyRed Light Therapy: 660nm vs 850nm, Dose, and Which Panel
Red and near-infrared light therapy (photobiomodulation) uses specific wavelengths to enhance mitochondrial function, accelerate recovery, and support skin health. This guide explains the science, optimal wavelengths, daily protocols, and how to evaluate the crowded device market.
Read guideSleep OptimizationHuberman Sleep Protocol: Temperature, Light, and Supplements
Sleep is the foundation every biohacker builds on, Huberman calls it the #1 performance enhancer. This guide covers the science of sleep stages, temperature regulation, light protocols, tracking with wearables, and the complete toolkit for deep restorative sleep.
Read guide
SupplementsBryan Johnson's Blueprint: What to Copy and What to Skip
Bryan Johnson spends ~$2M/year on his 'Don't Die' anti-aging protocol, the most measured human body in history. Blueprint includes 100+ daily supplements, precise sleep/calorie timing, plasma exchange, and relentless biomarker tracking. This guide breaks down what's evidence-based, what's experimental, and what mere mortals can actually adopt.
Read guide
Cognitive EnhancementBreathwork Protocols: Wim Hof, Box Breathing, and the Physiological Sigh
Breathwork is the most accessible biohack, free, immediate, and backed by real physiology. From Wim Hof's hyperventilation cycles to Navy SEAL box breathing, controlled breathing shifts autonomic state in minutes. This guide covers protocols, mechanisms, and building a daily practice.
Read guide
Supplements16:8 vs OMAD: What Huberman and Attia Recommend, and Who Should Not Fast
Intermittent fasting (IF) is one of the most practiced biohacks worldwide, popularized by Dave Asprey's Bulletproof approach and validated by decades of metabolic research. This guide covers 16:8 vs OMAD, ketosis timing, autophagy windows, and who should avoid fasting.
Read guide
Cognitive EnhancementWhat Is Brain Octane Oil, and How Do You Make Bulletproof Coffee?
Bulletproof Coffee, coffee blended with grass-fed butter and MCT oil, is Dave Asprey's signature biohack and the drink that launched the modern biohacking movement. This guide covers the science of fat-fueled mornings, C8 MCT vs C10, mold-free coffee, and how to build the ritual.
Read guideDiagnostics & TestingWhich Blood Tests for Longevity? ApoB, Insulin, and HbA1c
Annual bloodwork is the foundation of data-driven biohacking. Peter Attia's framework prioritizes ApoB, insulin, HbA1c, and inflammatory markers over standard lipid panels. This guide covers what to test, how often, where to order, and how to interpret results.
Read guide
SupplementsUrolithin A Guide: What to Look For in a Quality Supplement & Mitopure
Urolithin A is a gut microbiome metabolite that triggers mitophagy, the selective recycling of damaged mitochondria. Amazentis/Timeline's Mitopure is the first clinically validated urolithin A supplement. This guide covers the science, dosing, and who actually converts ellagic acid from food.
Read guide
Sleep OptimizationHow to Fix Your Circadian Rhythm: Morning Light, Meals, and Temperature
Your circadian rhythm governs sleep, hormones, metabolism, and mood. Huberman and Walker's most foundational advice isn't a supplement or gadget, it's light exposure timing. This guide covers the complete circadian protocol: morning sunlight, evening protection, meal timing, and temperature.
Read guide
Sleep OptimizationDoes Mouth Tape Work for Sleep? Nasal Breathing and Who Should Skip It
Mouth taping encourages nasal breathing during sleep, which may reduce snoring, dry mouth, and fragmented sleep architecture. Popularized by James Nestor's 'Breath' and the Buteyko community, it's one of the cheapest sleep biohacks. This guide covers safe taping methods and contraindications.
Read guide
Wearables & TrackersWHOOP vs Oura Ring (2026): Ring vs Band, Accuracy, Cost & Which Is Better
WHOOP vs Oura Ring (2026 comparison): which is better? Oura Ring 4 is the better choice for sleep staging accuracy, overnight HRV, illness temperature alerts, and unobtrusive 24/7 ring comfort ($349–$499 + $5.99/mo). WHOOP (4.0 / 5.0) is the screenless wrist/bicep band built for athletic strain coaching and recovery load management ($199–$359/yr membership). Note: WHOOP does not make a smart ring — if you want a ring or want to buy on Amazon with Prime shipping, choose [Oura Ring Gen 4](/equipment/oura-ring-gen4) or compare [Garmin Fenix 8 vs Oura vs WHOOP](/guides/garmin-fenix-vs-oura-vs-whoop).
Read guideLight TherapyBest Red Light Therapy Panels for Home Use (2026 Comparison)
Red light therapy (photobiomodulation) panels range from $150 travel-size units to $2,000+ full-body clinical panels, and price alone tells you almost nothing about effectiveness. What actually matters is irradiance at a realistic treatment distance, wavelength accuracy at 630–670nm (red) and 810–850nm (near-infrared), and whether the company publishes third-party testing. This guide compares Joovv's Elite panel, Hooga's budget-friendly HG panel, Mito Red's Mitopro line, and CurrentBody's LED mask for facial use, then breaks down how to choose based on your goals and budget. New to the science? Start with our Red Light Therapy complete guide.
Read guide
Tools & EquipmentBest Air Purifier for Biohackers: HEPA, VOC, and CADR Compared
Indoor air quality is an underrated biohacking lever, chronic exposure to fine particulates (PM2.5), VOCs, and allergens is linked to worse sleep, higher inflammatory markers, and reduced cognitive performance. But the air purifier market is full of inflated CADR claims and marketing around 'medical grade' filtration that doesn't always translate to real-world benefit. This guide compares IQAir's HealthPro Plus, AirDoctor's 5500, Blueair's Classic line, and Coway's Airmega, and explains which specs actually matter for a bedroom-focused biohacking setup. Broader home toxins context: Environmental Health. Water side: Water Filtration.
Read guide
Wearables & TrackersWHOOP vs Oura Ring vs Garmin Fenix 8 (2026): HRV, Sleep & Cost
This page compares the Garmin Fenix 8 with Oura and WHOOP. It is not a Fenix 9 Pro review — if a listing says Fenix 9 Pro, the specs below do not apply to it. Fenix 8 is a GPS multisport watch. Oura is a passive sleep ring. WHOOP is a screenless strain band. The [Oura Ring 4 review](/equipment/oura-ring-gen4) covers price and the membership on its own. Narrowed to ring vs band only? See [Oura vs WHOOP](/guides/oura-vs-whoop).
Read guide
SupplementsWhat Is AG1 (Athletic Greens)? Worth $79/Mo vs Amazon DIY Stack
AG1 (Athletic Greens) is the most marketed greens powder in biohacking — 75 ingredients in one scoop. Tim Ferriss and Huberman popularized it as nutritional insurance. This guide breaks down what's actually in greens powders, whether the $80/month price is justified, and how AG1 compares to DIY stacks and whole food.
Read guideSleep OptimizationSleep Cooling: Mattresses, Pads & Temperature Protocols
Sleep onset requires a 1–3°F core body temperature drop. Hot sleepers, couples with different preferences, and anyone chasing deep sleep often invest in active cooling — from $60 fan setups to $3,000 smart mattresses. This guide covers the science, equipment tiers, and Matthew Walker's temperature targets. For a head-to-head buy decision, see Eight Sleep vs BedJet vs Chilipad.
Read guide
Tools & EquipmentHigh-Ticket Biohacking Equipment on Amazon
Most premium biohacking gear sells direct-to-consumer only — Oura, Eight Sleep, Joovv, and Plunge require brand websites and long shipping times. But a meaningful tier of $400–$1,000+ equipment is available on Amazon with Prime shipping, buyer protection, and easy returns. This guide maps the highest-ROI high-ticket Amazon purchases by category, what to verify before buying, and where DTC-only brands still win.
Read guideTools & EquipmentIQAir vs AirDoctor vs Blueair: Which Air Purifier to Buy
IQAir HealthPro Plus, AirDoctor 5500, and Blueair Classic 480i are the three air purifiers people compare once they have left $150 Amazon units behind. IQAir and AirDoctor both claim capture down to 0.003 microns. Blueair is quieter and cheaper, and stops at 0.1 microns. This page is the buying decision. For particle science and placement, start with Indoor Air Quality.
Read guide
Tools & EquipmentTheragun vs Hypervolt: Which Massage Gun to Buy
Theragun PRO Plus and Hypervolt 2 Pro are the two massage guns worth comparing once you have ruled out $100 clones. Both hit 16mm of amplitude. Theragun costs $549–$649 and is built around a triangle grip that reaches your own back. Hypervolt costs $399–$449 and adds a pressure sensor. For how to use either one, see Percussion Massage.
Read guide
Tools & EquipmentNormatec vs Massage Gun: Which Recovery Tool to Buy
Normatec 3, a massage gun, and a Compex EMS unit get lumped together as 'recovery gear.' They are three different tools. Normatec squeezes fluid up the legs for $699–$899 while you sit still. A Hypervolt or Theragun hits tight muscle for $399–$649. Compex fires the muscle with electrodes for $549–$749. Buy one. For how to use a gun or boots on their own, see Percussion Massage and Compression Recovery.
Read guideTools & EquipmentBest Water Filter for Biohackers: Berkey vs AquaTru vs Waterdrop Compared
Tap water carries PFAS, fluoride, lead, and microplastics — biohackers filter drinking water for the same reason they filter air. This guide compares Berkey gravity filters, AquaTru countertop reverse osmosis, and Waterdrop under-sink tankless RO by contaminant removal, installation, and cost. For the science on filter types and regional water quality, see our Water Filtration guide.
Read guide
Wearables & TrackersStrength Training for Longevity: Grip, Power, and a Weekly Plan
Cardio gets the longevity headlines, but muscle mass, strength, and power are among the strongest predictors of healthy aging. This guide covers why resistance training belongs next to Zone 2, how much is enough, and a beginner-to-intermediate protocol that still works at 70.
Read guide
Diagnostics & TestingWhat Is a Good VO2 Max by Age, and How Do You Raise It?
VO₂ max — the maximum rate at which you can use oxygen — is one of the best-studied predictors of all-cause mortality. Peter Attia calls it a vital sign. This guide covers lab testing vs wearable estimates, what 'good' looks like by age, and a training mix of Zone 2 plus intervals.
Read guidePeptidesSemaglutide and Tirzepatide: Lean Mass, Rebound, and Safety
GLP-1 receptor agonists (semaglutide, liraglutide) and dual agonists (tirzepatide) moved from diabetes clinics into mainstream weight and metabolic culture. For biohackers, the live questions are muscle loss, rebound weight, nutrient quality, and whether a peptide drug belongs next to Zone 2 and protein. This is a map of the evidence — not a shortcut to a vial.
Read guide
SupplementsHow Much Protein for Longevity? 1.6–2.2 g/kg and Leucine
Protein is the most under-discussed longevity lever after sleep and training. Too little accelerates sarcopenia; the right amount supports muscle, bone, and metabolic health into older decades. This guide covers g/kg targets, meal distribution, and how protein needs change on GLP-1s and during fat loss.
Read guide
Tools & EquipmentHow to Cut Microplastic Exposure: Water, Food, and Filters
Microplastics and nanoplastics show up in water, food, air, and now human blood and placenta samples. The health impact is still being quantified, but exposure reduction is actionable today. This guide covers sources, what filters actually help, and a sane home protocol without plastic panic.
Read guide
Diagnostics & TestingDo Lectins Harm the Gut? Gundry's Claims vs the Evidence
Cardiac surgeon Steven Gundry built a massive following by linking lectins, leaky gut, and the microbiome to obesity and autoimmune disease. This guide explains his framework fairly, separates strong ideas from contested claims, includes practical recipes, and links his core books on Amazon.
Read guide
SupplementsDavid Sinclair's Protocol: NAD+, Sirtuins, and Lifespan
Harvard geneticist David Sinclair changed public conversation with Lifespan (2019): aging as treatable, NAD+ and sirtuins as levers, fasting and cold as free drugs. This guide explains his research fairly, maps his personal stack, includes longevity-friendly recipes, and links Lifespan editions on Amazon.
Read guide
SupplementsWilliam Li's Eat to Beat: Angiogenesis and the 5×5×5 Plan
Physician-scientist William W. Li, MD, made angiogenesis — how the body grows and prunes blood vessels — a household idea with his TED talk and Eat to Beat Disease. This guide explains his five defense systems fairly, maps the 5×5×5 add-foods framework, includes practical recipes, and links his books on Amazon.
Read guide
SupplementsWhat Is Outlive by Peter Attia? The Four Horsemen, Zone 2, and ApoB
Peter Attia’s Outlive (2023) is the most useful popular longevity book of the decade: delay the Four Horsemen (atherosclerosis, cancer, neurodegeneration, metabolic disease) with exercise, lipids, sleep, and emotional health — not a supplement haul. This guide translates the book into a sequence you can actually run, and links the hardcover on Amazon.
Read guideLearning Paths
Curated Reading Paths
Follow these guide sequences to build a complete understanding of each biohacking domain, from science to protocol to equipment.
The Gear Decisions Stack
Wearables, sleep cooling, red light, air & water — compare before you buy
The Recovery Stack
Sauna, cold plunge, red light, sleep tracking
The Sleep Stack
Magnesium + temperature control + HRV tracking + NSDR
The Metabolic Stack
CGM + Zone 2 + lifting + GLP-1 context + gut health
The Foundation Stack
Creatine, omega-3, vitamin D, NAD+, taurine. Tier-1 and tier-2 supplements.
The Blueprint Stack
Bryan Johnson's essentials: sleep, stack, tracking, environment
The Starter Stack
Free cold showers + breathwork + sleep basics
The Bulletproof Stack
Dave Asprey's morning ritual: fasting, fat-fueled coffee, vagus toning
The Mind Stack
Neurofeedback, nootropics, breathwork, and nervous system control
The 2026 Longevity Stack
VO2 max, lifting, mTOR, incretins — what the field is arguing about now
Featured
Top Biohacking Tools
Topics
Explore by Topic
From wearables to peptides, cold plunges to stem cells. Deep guides organized by domain.
Wearables & Trackers
Sleep rings, continuous glucose monitors, HRV devices, and biometric wearables used by top biohackers.
Light Therapy
Red light, near-infrared panels, and photobiomodulation devices for recovery, skin, and mitochondrial health.
Heat Therapy
Infrared saunas, traditional saunas, and heat exposure protocols for cardiovascular and longevity benefits.
Cold Therapy
Cold plunges, cryotherapy chambers, and cold exposure tools for recovery and resilience.
Supplements
Nootropics, longevity compounds, vitamins, and stacks, with evidence ratings and risk profiles.
Peptides
BPC-157, TB-500, epitalon, and other peptides, mechanisms, sourcing, and legal considerations.
Sleep Optimization
Sleep masks, mouth tape, cooling systems, and protocols for deep restorative sleep.
Cognitive Enhancement
Brain training, neurofeedback, tDCS, and cognitive performance tools.
Diagnostics & Testing
Blood panels, microbiome tests, genetic analysis, and at-home health diagnostics.
Procedures & Treatments
Stem cells, NAD+ IV, hyperbaric oxygen, and clinical anti-aging procedures.
Tools & Equipment
Water filters, air purifiers, grounding mats, and environmental optimization gear.
Biohacking questions, answered
What is biohacking?
Biohacking, as Longevindex uses the word, means changing sleep, training, food, and your environment using methods you can measure. Start with sleep, Zone 2, daily walking, and protein before gadgets.
Which biohacking protocols have the strongest evidence?
Sleep duration and timing, resistance training, Zone 2 plus a little hard cardio, and a high-protein diet have the strongest human data. Infrared sauna and creatine are close behind. NAD+ precursors, most peptides, and many wearables are narrower.
Where should a beginner start?
Fix sleep and morning light first, then Zone 2 and strength training. Add a vitamin D test before a large supplement stack. The protocols list is the short version of each method.
How does Longevindex rate evidence?
Claims are labeled strong, moderate, emerging, or anecdotal, next to the paragraph they describe. A podcast protocol is not treated as a trial. The scale is explained on how we rate evidence.
Does Longevindex sell the products it covers?
No. Equipment pages link to Amazon. Reo Tuku Iho Limited may earn an Amazon Associates commission, which does not buy a ranking. See the affiliate disclosure and the equipment directory.
Stay Ahead of the Curve
New guides, gear comparisons, and evidence reviews — delivered when we publish. No spam, unsubscribe anytime.
We respect your privacy. See our Privacy Policy. Unsubscribe anytime from any email.
Affiliate Disclosure
As an Amazon Associate, Reo Tuku Iho Limited earns from qualifying purchases through Amazon links on this site. We only link to Amazon for product purchases. Our reviews and ratings are independent and not influenced by affiliate relationships. Read our full disclosure policy.