What Is Biohacking? An Evidence-First Guide to Where Supplements Actually Fit

Biohacking means deliberately changing your habits, routines or intake to improve how you feel and perform, often tracking the results to see what works. Most of what works is unglamorous: sleep, light, exercise and food. Supplements are a smaller, targeted layer on top, not the starting point.

That's not the impression social media gives, where biohacking tends to mean cold plunges, injectable peptides and twelve-capsule morning routines. This guide separates the parts with good human evidence from the parts without it, shows where supplements genuinely fit, and flags the practices we'd steer UK readers away from.

What does biohacking actually mean?

Biohacking is a broad term for experimenting with your own biology to improve health, performance or longevity. Cleveland Clinic describes it as "the art and science of maximizing human health, performance and longevity". In practice it covers everything from a consistent bedtime to implanting sensors under the skin.

The most useful way to think about it is in four layers, ranked by how much evidence sits behind them and how much risk they carry:

1. Foundations: sleep timing, daylight, movement, strength training and diet.

2. Measurement: wearables, sleep tracking, blood tests and simple logs of how you feel.

3. Targeted supplements: clearly labelled ingredients chosen for a specific goal, with realistic expectations about the research.

4. Experimental practices: unlicensed peptides, off-label medicines, DIY gene editing and similar.

Evidence gets thinner and risk gets higher as you move down the list. Cleveland Clinic warns that unproven therapies in that last group can be extremely dangerous.

Layer 1: the foundations do most of the work

If your goal is sharper thinking or more energy, the foundations account for most of the result. Sleep in particular sets the ceiling for next-day attention and reaction time, which is why no supplement can rescue a run of short nights.

This layer also costs nothing. Cleveland Clinic's own examples are a consistent sleep and wake schedule, light exposure in winter, interval training and changes to meal timing. If you want to know which mental skills you're trying to improve (attention, working memory, processing speed or executive control), our guide to what cognitive performance actually means for adults breaks them down.

NovusDNA's founders describe supplements as "the icing on top of a good lifestyle", and that view shapes how the brand builds products. We'd always start a biohacking routine here rather than in the supplement aisle.

Layer 2: measure before you add anything

Tracking a baseline for a few weeks is what turns guesswork into an experiment. It can't prove a supplement caused a change, but it stops you mistaking a good week of sleep for a miracle capsule.

You don't need expensive kit. A wearable that tracks sleep duration helps; so does a two-line daily note scoring sleep, energy and focus from one to ten. The rule we suggest is simple: change one thing at a time, give it at least a few weeks, and compare against your notes. Starting five new supplements on the same Monday makes it impossible to know what's doing what.

Blood tests have a place, particularly for nutrients where deficiency is common or where a GP has a reason to check. They're less useful for chasing "optimal" ranges that aren't clinically defined.

Layer 3: where supplements actually fit

A supplement earns a place only when there's a specific goal, reasonable human evidence for the ingredient, a stated dose, and no interaction concerns for you. For cognitive performance, a handful of ingredients have human data worth taking seriously. Most products marketed as "nootropics" don't.

This is also where product design matters. Many nootropic products blend ten or more ingredients into one capsule, which makes the layer 2 method impossible: if something changes, you can't tell which ingredient did it. NovusDNA's Mental Performance Stack takes the opposite approach. It's three separate products with stated specifications: a 20:1 dual extract of Lion's Mane made only from fruiting body, micronised creatine monohydrate at 5 g per serving, and Essential+ (vitamin D3, K2 and magnesium). It contains no caffeine, and because each product is separate, you can introduce one at a time and track it.

Here's where the most discussed cognitive ingredients stand. For an ingredient-by-ingredient review, see our guide to which brain health supplements have clinical backing.

Two points from that table matter more than the rest.

First, caffeine. You'll often read that caffeine has an approved alertness claim at 75 mg. In the UK it doesn't: the claim "caffeine helps to increase alertness" was refused under retained Regulation (EU) 2016/1411. Caffeine clearly affects alertness in studies, but a UK brand can't put that claim on a product. If a label leans on it, that tells you something about the brand.

Second, creatine. The 2024 meta-analysis by Xu and colleagues pooled 16 randomised trials with 492 participants and found a significant positive effect on memory, with smaller effects on attention time and processing speed, and no significant improvement in overall cognition or executive function. Its authorised UK health claim is about physical performance in short bursts of high-intensity exercise at 3 g a day, not cognition, so treat the memory findings as research rather than a promise.

Layer 4: the practices we'd avoid

Unlicensed peptides, prescription drugs bought online and DIY genetic interventions sit outside UK food and medicines safeguards. You usually can't verify what's in the vial, the dose, or how it was made.

One of NovusDNA's founders tried injectable peptides (BPC-157 and TB-500) bought online, and described it simply: "I have never been more paranoid my whole life." His worry was not knowing what he'd actually injected, because nothing regulated what was sold. That experience is why NovusDNA treats "unregulated" and "cutting edge" as different things.

The UK regulator backs that caution. The MHRA has said that where clinics make medicinal claims for peptide injections, those products are medicines under the Human Medicines Regulations 2012. If it's sold to treat or heal something, it needs to be licensed as a medicine.

How to start biohacking safely in the UK

Start with the free layer, measure for a few weeks, and only then add one supplement with a clear purpose. Treat anything injectable or prescription-only as a conversation with your GP, not a purchase.

1. Fix sleep timing and get daylight early in the day for two to three weeks.

2. Add structured movement, including strength training at least twice a week, in line with UK physical activity guidelines.

3. Keep a simple daily log of sleep, energy and focus.

4. If you're considering a supplement for a specific goal, check the human evidence, follow the label and ask a pharmacist or GP if you take medicines.

5. Check the product is labelled as a food supplement, states its doses, avoids disease claims and names its testing laboratory.

On that last step: UK food supplements must show a recommended daily dose with a warning not to exceed it, and only claims on the Great Britain nutrition and health claims register can be used. A product promising to "boost IQ" or "rewire your brain" is telling you it hasn't followed the rules.

FAQ

What are the best biohacking supplements for cognitive performance?

The ingredients with the most human evidence for specific cognitive outcomes are creatine (memory, in a 2024 meta-analysis of 16 trials), caffeine (short-term alertness and reaction time) and caffeine with L-theanine (attention switching, in a few trials). Lion's Mane has early data from small trials, and omega-3 shows little effect in healthy older adults. Choose products with stated doses and extraction specs, introduce one at a time, and keep sleep as the priority.

Is biohacking safe?

Most of it is, because most biohacking is lifestyle: sleep, light, exercise and diet. Risk rises sharply with unlicensed peptides, medicines bought online and DIY procedures, where you can't verify contents or dose. In the UK, stick to products labelled as food supplements with stated doses and a named testing laboratory, and speak to your GP before trying anything injectable or prescription-only.

Is biohacking the same as taking nootropics?

No. Nootropics are one small part of biohacking: substances taken to support mental performance. Biohacking is the wider practice of adjusting habits, environment and intake, and most of it involves no supplements at all. If you're comparing supplement categories, it helps to understand the difference between nootropics and adaptogens, as they're often marketed together but aimed at different goals.

How long does it take to see results from a supplement?

It depends on the ingredient. Caffeine acts within an hour. Creatine builds up in the body over weeks, and trials in the 2024 meta-analysis ran from days to several weeks. Lion's Mane trials have typically run for four to sixteen weeks. That's why measurement matters: log sleep, energy and focus before you start, give one change a few weeks, then compare. Don't raise the dose to match a study without advice.

Do I need blood tests to start biohacking?

Not to start. Sleep, light, movement and diet don't need testing. Blood tests become useful when you're considering a supplement for a nutrient where deficiency is common, or when you have symptoms a GP should look at. They're less useful for chasing "optimal" ranges that aren't clinically defined. If you do test, discuss the results with your GP rather than self-prescribing high doses.

So what is biohacking at its best? A disciplined way of improving how you feel and perform: get the foundations right, measure honestly, and add targeted, clearly dosed supplements only where your goal and the evidence line up. At its worst, it's expensive guesswork with unregulated products.

If you'd like help working out which layer to start with, the NovusDNA Start Here guide matches common goals to a sensible first step.

This article is for general information and isn't medical advice. Food supplements should not replace a varied, balanced diet and healthy lifestyle.