Gold has been associated with the mind, vitality and human potential for centuries. Today, that fascination has moved into a very different world: nanoscience.
Researchers are investigating extremely small particles of gold across neuroscience, neuroinflammation, brain-energy metabolism, drug delivery and regenerative medicine. At the same time, colloidal gold continues to attract interest among people looking for products associated with mental clarity, focus and personal wellness routines.
But there is an important distinction.
Research involving engineered gold nanoparticles does not automatically prove that drinking a commercial colloidal gold product improves memory, intelligence or brain function.
The science is more interesting than that simple claim.
This guide examines what researchers have actually discovered about colloidal gold and the brain, including an unusual human pilot study, modern animal research into neurogenesis, specialised clinical gold nanocrystal studies, the blood-brain barrier and a significant 2026 study that analysed commercial colloidal gold supplements themselves.
Quick Answer: Can Colloidal Gold Improve Brain Function?
Gold nanoparticles are being studied for their interactions with biological systems involved in cognition, inflammation, oxidative stress, neurogenesis and brain-energy metabolism. Some experimental studies have produced intriguing results.
However, the evidence varies dramatically depending on the type of gold material being studied.
- An early human colloidal-gold pilot involved only five participants.
- A 2021 cognition study involved electromagnetised gold nanoparticles in aged mice.
- Human studies involving brain-energy metabolism have used a specialised investigational gold nanocrystal medicine called CNM-Au8.
- Modern brain-delivery research frequently uses specifically engineered nanoparticles with controlled coatings, sizes and administration routes.
- Research directly examining commercially available oral colloidal-gold supplements is only beginning to emerge.
So the scientific question is not simply, “Does gold boost the brain?”
A better question is: what can different forms of nanoscale gold do biologically, and how much of that research can reasonably be applied to consumer colloidal gold?
For a broader introduction to the material itself, read our guide to what colloidal gold actually is.
What Is Colloidal Gold?
Colloidal gold is a liquid dispersion containing extremely small particles of elemental gold suspended through a liquid, usually purified water.
At very small scales, gold behaves differently from the familiar yellow metal used in jewellery. Gold nanoparticles can display distinctive optical, surface and chemical properties that make them useful in modern scientific research.
This distinction matters because the phrase gold nanoparticle covers an enormous range of materials.
A particle developed as an experimental medicine may be very different from a particle found in a commercial colloidal preparation. Researchers can modify:
- particle size
- particle shape
- surface coating
- electrical characteristics
- aggregation behaviour
- concentration
- route of administration
Each of these factors can influence biological behaviour.
That is why Gold Healing's Gold Nanoparticles Research Library separates engineered nanomedicine studies from evidence involving ordinary commercial colloidal-gold preparations.
The Curious History of Gold and the Mind
Gold has occupied an unusual place in medicine, alchemy and wellness traditions for centuries.
Historical practitioners used different gold preparations for a wide range of purposes, although these historical preparations were chemically and physically very different from modern nanoparticle formulations.
Modern interest is no longer based simply on gold's symbolism.
Nanoscience has established that gold can develop genuinely unusual characteristics when its dimensions are reduced to the nanoscale. That discovery has made gold nanoparticles useful experimental tools in areas ranging from diagnostics to neuroscience.
The Famous Colloidal Gold IQ Study: What Actually Happened?
One of the most frequently repeated claims online is that colloidal gold can increase IQ by around 20%.
That claim comes from a real but extremely small exploratory study published by Guy E. Abraham, Souhaila A. McReynolds and Joel S. Dill in Frontier Perspectives in 1998.
The researchers gave colloidal metallic gold to five participants aged between 15 and 45 for four weeks. Cognitive performance was assessed using the revised Wechsler intelligence testing system before and after the intervention.
The paper reported an increase in average test scores during the four-week period.
Why the Study Is Interesting
It is unusual because it directly investigated oral colloidal gold and cognitive testing in humans, something that remains surprisingly rare.
It therefore deserves to be mentioned when discussing the history of colloidal-gold cognition research.
Why It Does Not Prove Colloidal Gold Raises IQ
The limitations are substantial.
- Only five people participated.
- There was no meaningful placebo control group.
- The sample covered a very broad age range.
- The study was extremely short.
- The findings have not been established through large, independent controlled trials.
With only five participants, repeated cognitive testing itself can also influence scores because people become more familiar with the testing process.
So it would be inaccurate to turn this study into the statement: “Colloidal gold increases IQ by 20%.”
A more scientifically accurate interpretation is: an intriguing five-person pilot reported improved cognitive test scores following four weeks of colloidal gold, but the study was far too small and uncontrolled to establish that colloidal gold increases intelligence.
You can view a copy of the original pilot study here.
Modern Research: Gold Nanoparticles, Neurogenesis and Memory
More recent neuroscience has produced another fascinating result, although again it needs careful interpretation.
A 2021 study published in Biomaterials investigated electromagnetised gold nanoparticles in aged mice.
The researchers reported increased activity associated with neural stem cells and neural progenitor cells in the hippocampus, a brain region closely involved in learning and memory.
They also reported increased hippocampal neurogenesis alongside improvements in cognitive function and memory consolidation in the aged mice.
This is a genuinely interesting result.
But there is a crucial detail: the researchers used electromagnetised gold nanoparticles. They did not simply give the mice an ordinary bottle of consumer colloidal gold.
The study therefore provides evidence that specifically manipulated gold nanoparticles can affect biological pathways involved in neurogenesis under experimental conditions. It does not prove that ordinary oral colloidal gold creates the same effect in humans.
Read the study on PubMed.
Why Neurogenesis Matters
Neurogenesis is the process through which new neurons are generated.
Adult neurogenesis is particularly associated with the hippocampus, where it is investigated in relation to learning, memory, ageing and neurological resilience.
Neurogenesis naturally declines with age, which is one reason researchers are interested in materials capable of influencing neural stem-cell activity.
The 2021 gold nanoparticle study is exciting because it demonstrates that nanoscale gold can participate in experimental systems connected to this process.
For Gold Healing, however, the scientifically responsible position is to treat this as preclinical mechanism research, not as proof that taking colloidal gold generates new neurons.
Gold Nanoparticles and Neuroinflammation
Another major area of research involves neuroinflammation.
Inflammatory signalling within the nervous system plays a role in ageing and many neurological disorders. Researchers have therefore investigated whether gold nanoparticles can influence inflammatory pathways, oxidative stress and cellular protection.
A 2024 scientific review examining gold nanoparticles in neurological disease research described experimental evidence involving neuroinflammatory signalling, oxidative stress, mitochondrial protection, cell-survival pathways, neuronal connectivity and targeted drug delivery.
Most of this evidence comes from laboratory and animal models rather than ordinary consumer supplementation.
Read the review on PubMed.
We also explore one particularly interesting obesity-related mouse study separately in our article on gold nanoparticles, brain inflammation and oxidative stress.
Brain Energy and Gold Nanocrystals
One of the most important recent developments in this field involves a specialised investigational gold nanocrystal medicine called CNM-Au8.
This research is particularly interesting because it involves human participants rather than only cells or animals.
In the REPAIR-MS and REPAIR-PD phase 2 studies, researchers used advanced brain imaging to investigate energy metabolism in people with multiple sclerosis and Parkinson's disease who received CNM-Au8.
Across the combined evaluable cohorts, researchers reported an average 10.4% increase in the brain NAD+/NADH ratio after more than 12 weeks of treatment.
NAD+ and NADH are involved in cellular energy metabolism, so the finding provided evidence that this specific gold nanocrystal formulation was interacting with brain-energy pathways.
That is an important human result.
However: CNM-Au8 is an investigational catalytic gold nanocrystal medicine. It is not the same formulation as Gold Healing Colloidal Gold or a generic colloidal-gold supplement.
We therefore should not take the 10.4% result and claim that drinking colloidal gold increases brain energy by 10.4%.
What the trial demonstrates is something more specific and scientifically interesting: a carefully engineered form of nanoscale gold can produce measurable changes in human brain-energy metabolism.
Read the research on PubMed.
Can Gold Nanoparticles Cross the Blood-Brain Barrier?
The brain is protected by the blood-brain barrier, often abbreviated to BBB.
This specialised network helps control which substances can pass from circulating blood into brain tissue.
Some gold nanoparticle systems can reach or cross the blood-brain barrier under particular experimental conditions. But statements such as “gold nanoparticles effortlessly pass through the BBB” are far too simplistic.
Modern reviews show that brain delivery can depend on:
- particle diameter
- shape
- surface charge
- surface coating
- protein interactions
- dose
- route of administration
- targeting molecules attached to the particle
A major 2026 review of gold nanoparticles in central nervous system disease research highlights the importance of designing and optimising particles for brain delivery, while also discussing toxicity and the barriers to clinical translation.
This is why we do not claim that the particles in a consumer colloidal-gold product automatically cross the human blood-brain barrier simply because they are nanoscale.
See the 2026 CNS review on PubMed.
The 2026 Study That Changes the Colloidal Gold Conversation
One of the most relevant studies for the colloidal-gold industry was published in June 2026.
Instead of creating a specialised laboratory nanoparticle formulation, researchers purchased and analysed commercially available colloidal gold dietary supplements intended for oral consumption.
That distinction is important.
Researchers examined products labelled at 30, 55 and 110 mg/L.
Using electron microscopy and other analytical techniques, they confirmed that the products they tested contained metallic gold nanoparticles with a reported particle-size distribution of approximately 4 to 11 nanometres.
The study therefore provides useful evidence that at least some commercially available colloidal-gold supplements genuinely qualify as nanomaterials under current definitions.
What the Study Did Not Show
The researchers did not test memory, IQ, focus, mood or cognitive performance.
The biological component consisted primarily of preliminary cell-based assessments. Responses also differed depending on cell type, and the authors concluded that longer-term toxicological work is needed.
So this research should not be turned into a claim that commercial colloidal gold improves brain function.
Why the Study Still Matters
Until recently, much of the conversation around colloidal gold relied on extrapolating from engineered nanomedicine research.
This paper begins to close that gap by studying commercial oral products themselves.
That means future research can increasingly ask questions about the actual physicochemical properties, exposure levels and biological behaviour of colloidal-gold supplements rather than treating all gold nanoparticles as interchangeable.
Read the 2026 study on PubMed.
So What Does the Science Actually Tell Us?
What We Can Say
- Gold nanoparticles possess biological properties that are actively studied in neuroscience.
- A very small historical human pilot reported changes in cognitive test scores after colloidal-gold use.
- Electromagnetised gold nanoparticles increased neurogenesis and improved cognition in aged mice in a 2021 study.
- Gold nanoparticles have shown effects on inflammatory and oxidative-stress pathways in experimental neurological research.
- A specialised investigational gold nanocrystal medicine has produced measurable changes in human brain-energy metabolism.
- Commercial colloidal-gold supplements themselves are now beginning to receive direct physicochemical and biological research.
What We Cannot Yet Say
- That ordinary colloidal gold has been proven to increase IQ.
- That drinking colloidal gold has been proven to improve human memory.
- That consumer colloidal gold has been proven to generate new neurons.
- That all colloidal-gold particles automatically cross the blood-brain barrier.
- That findings from specialised gold nanocrystal medicines can be transferred directly to commercial colloidal gold.
This distinction does not make the science less exciting. It makes it more useful.
Why Particle Characteristics Matter
The phrase “colloidal gold” does not tell you everything about a product.
Two gold dispersions with the same ppm concentration can still differ in their particle size, particle distribution, degree of aggregation, surface chemistry, stability, water quality and production process.
This is why ppm should not be treated as a complete measure of quality.
Gold Healing Colloidal Gold is clearly specified as a 60ppm preparation made with 24K, 99.99% pure elemental gold and steam distilled water.
We do not currently claim a laboratory-verified 2 to 10 nm particle range for Gold Healing's product simply by extrapolating from other research.
That distinction matters.
You can explore the production process in our guide to how Gold Healing Colloidal Gold is made in the UK.
Why People Associate Colloidal Gold With Mental Clarity
Modern colloidal-gold use often sits at the intersection of two very different traditions.
One is historical and experiential: gold's long association with vitality, consciousness, clarity and refinement.
The other is modern scientific curiosity around nanogold, neuroscience and cellular biology.
That combination helps explain why people continue to explore colloidal gold as part of routines centred around mental clarity, focus, creative work, calm attention, meditation and personal wellness rituals.
These reasons for using a product should not be confused with established medical outcomes. But they are part of the reason colloidal gold remains such an unusual meeting point between ancient ideas and modern materials science.
Where Gold Healing Colloidal Gold Fits
Gold Healing does not manufacture CNM-Au8, electromagnetised research nanoparticles or a neurological medicine.
Our product is a clearly defined colloidal preparation made from:
- 24K elemental gold
- 99.99% stated gold purity
- steam distilled water
- a stated concentration of 60ppm
- a 500ml liquid format
It is produced through a controlled electrochemical process and contains no added preservatives, fillers, flavourings or artificial colouring agents.
If you are researching colloidal gold for the first time, begin with our beginner guide to colloidal gold before comparing products.
You can also explore the broader evidence in our guide to 20 potential colloidal gold benefits and what science currently says.
For the original scientific publications, visit the Gold Nanoparticles Research Library.
Choosing Colloidal Gold Without Falling for the Hype
Because colloidal gold sits in an emerging area of science, marketing claims can easily move faster than the evidence.
A more useful way to compare products is to look for transparent information about the gold source, stated purity, concentration, ingredients, production method, bottle size, usage instructions and the distinction between product specifications and scientific research.
Be especially cautious when a seller claims that its product has the same effects observed in a pharmaceutical nanogold trial simply because both products contain gold.
The formulation matters. The particle matters. The route of administration matters. And the type of evidence matters.
Key Takeaways
- Gold nanoparticles are a genuine and rapidly developing area of neuroscience research.
- A 1998 five-person colloidal-gold pilot reported cognitive score changes but is far too small to prove an IQ-enhancing effect.
- A 2021 mouse study found increased hippocampal neurogenesis and improved cognition using electromagnetised gold nanoparticles.
- Specialised CNM-Au8 gold nanocrystals have produced measurable effects on brain-energy metabolism in human research.
- Gold nanoparticle access to the brain depends on particle design and administration, not merely being “small”.
- A 2026 study directly analysing commercial colloidal-gold dietary supplements confirmed metallic nanoparticles in the products tested, but did not test cognitive benefits.
- Consumer colloidal gold should therefore not be presented as clinically proven to raise IQ, regenerate neurons or treat neurological disease.
- The research is nevertheless substantial enough to make nanoscale gold an increasingly interesting field to follow.
Frequently Asked Questions
Does colloidal gold improve brain function?
Research on nanoscale gold includes studies involving cognition, neurogenesis, neuroinflammation and brain-energy metabolism. However, much of this evidence involves engineered nanoparticles, animal models or specialised investigational nanomedicines. There is not currently strong clinical evidence proving that ordinary consumer colloidal gold improves human brain function.
Can colloidal gold increase IQ?
A five-person pilot published in 1998 reported increased Wechsler cognitive test scores after four weeks of colloidal gold. The study is interesting historically, but its tiny sample size and lack of a meaningful control group mean it cannot establish that colloidal gold increases IQ.
Has colloidal gold been studied in humans?
Human evidence directly involving ordinary oral colloidal gold is limited. There is an older five-person cognition pilot, while modern human research has largely focused on highly specialised engineered gold nanocrystal formulations such as CNM-Au8. These formulations should not be treated as interchangeable with consumer colloidal gold.
Can gold nanoparticles create new brain cells?
A 2021 animal study found increased hippocampal neurogenesis in aged mice treated using electromagnetised gold nanoparticles. This is preclinical evidence involving a specialised experimental system and does not prove that drinking ordinary colloidal gold generates new neurons in humans.
Can gold nanoparticles cross the blood-brain barrier?
Some engineered gold nanoparticle systems can reach or cross the blood-brain barrier under specific experimental conditions. The outcome depends on particle size, shape, coating, charge, dose, targeting strategy and administration route. It cannot be assumed that every colloidal-gold preparation crosses the blood-brain barrier.
What is CNM-Au8?
CNM-Au8 is an investigational catalytic gold nanocrystal medicine studied in neurological research, including multiple sclerosis and Parkinson's disease. It is a specialised pharmaceutical nanomaterial and is not the same product as consumer colloidal gold.
What did the 2026 commercial colloidal-gold study find?
Researchers analysed commercially available oral colloidal-gold supplements and confirmed metallic gold nanoparticles with particle sizes of approximately 4 to 11 nanometres in the products tested. The study assessed physicochemical characteristics and preliminary cell responses, not memory, IQ or cognitive improvement.
What is Gold Healing Colloidal Gold made from?
Gold Healing Colloidal Gold is a 60ppm liquid preparation made using 24K, 99.99% pure elemental gold and steam distilled water. It contains no added fillers, flavourings, preservatives or artificial colouring agents.
Explore the Research
If this subject interests you, the best place to continue is the Gold Healing Gold Nanoparticles Research Library, where we organise original scientific publications alongside explanations of what different studies do and do not demonstrate.
You can also explore:
- What Is Colloidal Gold?
- 20 Colloidal Gold Benefits: What Does the Science Say?
- Gold Nanoparticles and Brain Inflammation Research
- How Colloidal Gold Is Made in the UK
- Explore Colloidal Gold UK
Explore Gold Healing 60ppm Colloidal Gold
Gold Healing's ruby red colloidal gold is supplied in a 500ml bottle at a stated concentration of 60ppm and is made using 24K, 99.99% pure elemental gold and steam distilled water.
If you have finished researching the category and want to see the full product specification, ingredients, usage guidance and current customer reviews, visit the Gold Healing 60ppm Colloidal Gold product page.
Scientific References
- Abraham GE, McReynolds SA, Dill JS. Effect of Colloidal Metallic Gold on Cognitive Functions: A Pilot Study. Frontier Perspectives. 1998;7(2):39-41. Study copy.
- Chang Y, Cho B, Lee E, et al. Electromagnetized gold nanoparticles improve neurogenesis and cognition in the aged brain. Biomaterials. 2021;278:121157. PubMed PMID 34601195.
- Chiang MC, Yang YP, Nicol CJB, Wang CJ. Gold Nanoparticles in Neurological Diseases: A Review of Neuroprotection. International Journal of Molecular Sciences. 2024;25(4):2360. PubMed PMID 38397037.
- Robinson A, et al. Evidence of brain target engagement in Parkinson's disease and multiple sclerosis by the investigational nanomedicine, CNM-Au8, in the REPAIR phase 2 clinical trials. Journal of Nanobiotechnology. 2023. PubMed PMID 38087362.
- Prá M, Ferreira GK, de Mello AH, et al. Treatment with isolated gold nanoparticles reverses brain damage caused by obesity. Materials Science and Engineering C. 2021;120:111392. PubMed PMID 33545808.
- Gold Nanoparticles in Central Nervous System Diseases: Recent Progress, Challenges, and Therapeutic Opportunities. Nano Letters. 2026. PubMed PMID 42200795.
- Bute OC, Gheboianu AI, Neacsu A, et al. Colloidal Gold Dietary Supplements as Nanomaterials: Physicochemical Evaluation, Estimated Oral Exposure, and Preliminary Biological Assessment. International Journal of Molecular Sciences. 2026;27(13):5872. PubMed PMID 42450145.
Research context: Studies involving engineered nanoparticles, specialised nanomedicines, laboratory systems or animal models should not automatically be interpreted as evidence that a commercially available colloidal-gold product produces the same biological effect in humans.
