This piece comes from my weekly Monday livestream, where I run a neurofeedback session on myself and then teach on a topic. This week I went after the biohacking sacred cows: the habits and gadgets people swear by that either do nothing or actively waste your money and attention. I covered nine of them. Each one gets the mechanism and the evidence, so you can stop spending energy on things that do not move the needle.
I ran a C4-Pz protocol on myself during the stream, rewarding low beta (11.5 to 14.5 Hz) and inhibiting theta and fast beta. If you want to understand why that kind of training works, I cover it in SMR Neurofeedback: Train Sleep, Focus, and Self-Control. Now to the myths.
Do blue light blocking glasses help your sleep?
The blue blocker industry is large and the evidence behind it is thin. Two things matter for your circadian system, and the color of evening light ranks low on both of them.
First, humans tolerate roughly an hour of circadian disruption per day without noticing. A well-regulated nervous system absorbs that slack. Second, the literature that does show light entraining the clock points to light intensity, not wavelength. Bright light at night can shift your rhythm. The specific blue component does not add anything beyond brightness. The screen-in-bed habit everyone warns you about pushes your rhythm back by about an hour, which most people shrug off.
The blue light that genuinely cues your clock is morning light. That signal is real, though still imperfect, which is why a gentle morning routine with outdoor light matters more than orange glasses at night. Your most powerful circadian cue is when you eat. Fasting before bed does more for sleep quality than any pair of glasses. I unpack the morning side of this in Biohacking Your Morning: The Minimum Viable Practice for Circadian Health and the eating-window side in Strategic Fasting: Time-Restricted Eating for Metabolic and Cognitive Health.
Is non-native EMF actually harmful?
Getting electricity into the body is hard. Your fat and skin form an excellent insulating layer. The only mechanism with real evidence behind it is extreme tissue heating, the microwave effect you might get sitting directly under a transformer or high-tension lines.
The non-native EMF from phones and televisions has no demonstrated harm. You already absorb a fair amount of electromagnetic energy from the natural environment, often more than your devices put out. Electromagnetic fields drop off fast as you move away from the source, so classic EM cannot be felt from more than a few feet away unless you are dealing with long-wavelength radio waves.
People who report EMF sensitivity are usually feeling something real, but the source is a sensitized nervous system, not the field. The human brain is good at pulling subtle information out of the environment, even from an unfamiliar transducer. That is a story about perception. I have asked the biohacking community repeatedly for one piece of real research showing non-native EMF harm and have received only opinion pieces. If you have a study, I want to see it.
Is "quantum" anything in a health context real?
Unless you are lying inside an MRI machine or standing in a physics lab, the word "quantum" in a health pitch is a marketing tell. There is no quantum health, no quantum vibration therapy, no valid quantum healing device. The term obscures the absence of a mechanism with a borrowed, impressive-sounding word.
One device worth naming the pattern around: a so-called neurofeedback machine that bolts "quantum" onto its branding, sometimes alongside "Rife" or "SCIO" language. That is branding, not neurofeedback. If you want to understand what real neurofeedback is and how it is studied, read Is Neurofeedback Legitimate? A Research Overview.
Can neurotransmitter testing tell you anything useful?
You can measure neurotransmitter metabolites in urine, blood, and cerebrospinal fluid. The problem is what those numbers mean.
Hormones get released into circulation and act at a distance, with a delay, for a long time. Neurotransmitters work differently. They are released into a sealed synapse, act right there, and stay local. The relationship between the signaling behavior of a neurotransmitter in a synapse and the level of its metabolite in your urine is, for practical purposes, close to nothing. CSF metabolites correlate a little better, but draining CSF requires a lumbar puncture, and even then you hit the deeper problem: the absolute level of a neurotransmitter is mostly irrelevant.
Consider the clearest example. In Parkinson's disease, you can lose a large majority of your dopamine-generating neurons in the substantia nigra before motor symptoms appear, sometimes for years. Symptoms appear only after that threshold. The brain tunes itself around whatever dopamine is available: receptors become more sensitive and more numerous as supply drops. The system self-calibrates, which means an absolute peripheral number tells you nothing about the signaling happening in the synapse.
The same logic undercuts the "chemical imbalance" story for depression. No demonstrated serotonin imbalance exists outside of TV commercials, a point now backed by a large umbrella review of the serotonin literature (Moncrieff et al., 2022). Antidepressants that move serotonin appear to help because wiggling that system triggers a plasticity boost elsewhere, particularly hippocampal neurogenesis driven by BDNF. We do not understand neurotransmitters well enough to treat any single absolute level as meaningful, and peripheral measurement cannot track brain signaling. Skip the test.
What is the best neurofeedback device?
This is the question I see most often on Reddit, and the question itself has the wrong shape. There is no best device.
Consumer headbands and one-size-fits-all caps that run off preset phone menus produce sloppy signals and offer little configurability. Spending a few hundred dollars on one of those is wasted money, and the black-box menu-driven systems tend to cause more side effects while making the good effects harder to reach.
Compare it to getting in shape. A kettlebell, a barbell, swimming, body-weight work, yoga: any of them will get you strong if your technique and programming are right, and any of them will do nothing or hurt you if they are wrong. The tool is not the variable. Technique is.
What actually matters is learning your own brain first. Get a full-head QEEG brain map and learn how your stress, sleep, tension, mood, cravings, processing speed, and sensory and social systems work. Once you know what you are training and you understand EEG, almost any configurable software and hardware can get good results.
A note on brain mapping itself. I saw a colleague's report recently: a gorgeous LORETTA full-head analysis showing a clear hot spot of beta on the front midline, packed into three pages with one big brain picture, three index scores, and two paragraphs of targets. It was technically nice and it was the wrong approach. A brain map should be a process where you sit with someone and learn to read your own data, finding what gels with what you already know about yourself, not receiving a labeled answer sheet. If you are getting into this work seriously, learn the brain deeply and learn several tools rather than trusting one vendor's built-in assumptions. For the practical and cost side, see Does Neurofeedback Work for ADHD? A Neuroscientist's Guide and How Much Does Neurofeedback Cost in 2026?.
Does alkaline water change your body's pH?
You can make water alkaline. Your body's pH stays in a very narrow range because small deviations are lethal, so your physiology defends it tightly. Alkaline water mostly changes the pH of your bladder, then your toilet.
Clean water free of contaminants and metals is worth caring about. Beyond that, plain water is fine. Structured water is another piece of nonsense. And if your body's alkalinity ever does go off, you have a medical emergency on your hands, not a wellness question.
Are sleep trackers and wearables accurate?
Partly. Deep sleep is reasonably valid on most trackers. REM tracking is another matter, and the reason connects back to the pH point.
Your brain protects and asserts REM the way your body protects blood pH. Plenty of people do not remember their dreams and assume they barely dream, but everyone dreams every night. Recall depends on good deep-sleep consolidation, which is why people with suboptimal sleep, meaning most of us, do not remember much. A wrist tracker cannot measure REM well, and for most people that gap does not matter: genuine REM disruption accompanies severe illness, hallucinations, or major depression, and you will know when you are there. Watch your deep sleep numbers and ignore the REM estimate. More on the mechanics in Biohacking Sleep: Optimize Your Rest for Peak Performance.
Do detox products and cleanses work?
The way to detox your body is to stop putting garbage into it. Your liver, kidneys, and other systems clear toxins continuously, and you cannot accelerate that process with teas or special foods. Eat adequately, get enough fiber, and hydrate. Fiber and water help things move through the gut, and that is the entire dietary detox story. Protect your liver and kidneys and they handle the rest.
Is there a magic nootropic or Limitless pill?
Nootropics do something. No pill makes you permanently focused, fast-learning, and sharp. The movie was fun and the molecule does not exist.
You can move your cognitive performance through other routes. Some neurofeedback studies report IQ gains in the range of half a standard deviation or more, though the literature is uneven and the larger numbers come from small or uncontrolled samples. Meditation, sleep work, enough protein, dropping sugar, weightlifting, and good circadian timing all have real evidence behind them. For the broader framework, see Biohacking Intelligence: Optimizing Cognitive Resources and Biohacking Flow State: The Neuroscience of Peak Performance.
Nootropics are individual. Racetams and cholines like CDP-choline help some people with verbal fluency or processing speed, and in others they produce anxiety, muscle tension, or even a searing trauma-like response. A few compounds may be broadly beneficial, including magnesium, omega-3s, vitamin D, and creatine. Creatine gets dismissed as a bodybuilder supplement and has substantial brain and anti-aging effects, and we have known about it as a supplement for decades. With AI-driven drug discovery, tailored medicine matched to your genes, goals, and metabolism is arriving sooner than most people expect. Until then, define the goal and iterate toward it.
Alpha-Theta training: the sounds and what they do
A viewer asked about Alpha-Theta training, so I demonstrated the audio environment. The system filters three frequencies from raw EEG, usually off the back of the head: theta, alpha, and high beta. You reward theta and alpha. A gong sounds when you produce theta, a chime when you produce alpha. Underneath those, a water track plays a babbling brook when alpha amplitude leads and crashing ocean waves when theta leads. The deeper brain waves produce the deeper sounds, and you can follow the gongs and waves to drop further down.
The training holds you at the edge of sleep, the hypnagogic state where you have your best ideas right before you lose them to sleep. You stay there 20 to 25 minutes. The monkey mind drops away and emotional access, insight, and flow rise up.
Alpha-Theta has a track record with alcohol craving going back to early controlled work in inpatient alcoholism treatment (Peniston & Kulkosky, 1989). Over a few months it has been reported to reduce craving and support the ability to downregulate, so a shaky, nervous drinker can fall asleep at will without anxiety. The early Peniston work also reported changes in immune-related and beta-endorphin measures, and the protocol has historically been used for trauma because it appears to improve emotional awareness and the ability to put feelings into words. For trauma work specifically, much of the field has moved toward infra-low and infra-slow approaches and unusual sub-7 Hz amplitude rewards in posterior regions, building on the work of Sue and Siegfried Othmer and the neuroimaging of Ruth Lanius. The point holds: a skilled provider can do this work across many systems, so do not get locked into one vendor's blind alley. To go deeper on the alpha side, see Decoding Alpha Waves: Your Brain's Idle and Its Brakes.
Putting this into practice
Most of these myths share a structure. They take something with a kernel of plausibility, attach a product to it, and skip the mechanism. When you ask how the thing is supposed to work in the body, the story falls apart. Spend your money and attention on interventions with mechanisms and data behind them: morning light and eating-window timing, deep-sleep quality, protein and weightlifting, meditation, and brain training built on an actual QEEG. Starting by learning your own brain rather than buying into someone else's pitch is the move that separates people who make progress from people who accumulate gear.