
· 14 min read · 24 sources
Sauna: what the research actually says
The famous Finnish numbers compare sauna users against sauna users, not against people who never go. Everything we found, including the null result.
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Orthomolecular therapist and longevity coach
Founder of Kratos Natural
My name is Liam Kratos. I read the research behind the things being sold to you, and I write down what it actually says. Including, and especially, when that means something does not work.
Natural nutrition, aromatherapy, herbal medicine, orthomolecular therapy and orthomolecular nutrition, all five completed at Dutch higher professional education level. I keep learning every day, because the research does not stand still either.
Knowledge about your own body should be free. Not free as bait for something else. Just free, so anybody can live well and spend their attention on what they actually want to do, instead of on working out who is lying to them.
There is a second half to it. The best products and the best food there is, at the lowest price we can make it. We would rather earn something small in the open than something large quietly, and what we earn we write down.
And the reason any of this is needed: almost everybody who ends up here has already bought something that did nothing. A supplement after a reel, a posture corrector, an expensive stack. That money does not come back. What is left is caution, and caution is the thing this site is trying to answer.
Every analysis starts with a PubMed search that I print alongside it, so you can run it again yourself. I read research in people, not cell cultures and not mice, unless I say explicitly that is what a finding rests on.
Null results get the same space as positive ones. If I cannot trace a claim to a published, indexed source, I do not make the claim.
20 analyses

· 14 min read · 24 sources
The famous Finnish numbers compare sauna users against sauna users, not against people who never go. Everything we found, including the null result.
Read article
· 7 min read · 10 sources
Blue light suppresses melatonin and shifts your body clock. But intensity and timing weigh more than colour, and people differ more than lamps do.
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· 9 min read · 13 sources
One trial found the relief wearers report. Another swapped the lens for an equally dark grey one, and the benefit disappeared. What is left that works.
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· 9 min read · 12 sources
Cochrane found no trial free of bias risk. The gap between what people feel and what the equipment records explains almost everything.
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· 5 min read · 7 sources
The worry comes almost entirely from cell cultures. The reassurance comes from patients. What the clinical evidence says, and the question nobody asked.
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· 5 min read · 10 sources
Several meta-analyses say red light on your head helps memory, and there is now a home-device trial. What was measured, and where the evidence is thin.
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· 6 min read · 12 sources
Thousands of children have had red light shone straight into their eyes for myopia. What those trials showed about safety, and where harm did happen.
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· 5 min read · 11 sources
There are 412 systematic reviews on light and pain, and they do not agree. What the full texts say that the abstracts leave out, condition by condition.
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· 4 min read · 6 sources
In diabetic foot ulcers red light nearly doubles the chance of healing. In venous leg ulcers it does nothing. Wound healing is not one outcome.
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· 9 min read · 64 sources
Red and near-infrared light across skin, pain, cognition, mood and eye safety, with a transparent count of how many studies were actually verified.
Read article· 13 min read · 12 sources
Per measurement, from the validation studies, with what we would pick for each one. Plus the other half nobody asks: what a sensor strapped to your skin around the clock is actually doing to it.
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· 8 min read · 4 sources
Calculate your biological age free from your own blood work, using the published formula. What it means, how to measure it, and what actually lowers it.
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· 6 min read · 7 sources
The word gets used for two different things. Lifespan is how long you live; longevity, as this field uses it, is how many of those years you are well. What determines it, and what is actually proven.
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· 5 min read · 6 sources
In trials where adults were given one sugary drink a day on top of their normal diet, they gained 0.83 kg. Taking one a day away gave half a kilo back. And when you do have one, what is already in your stomach decides how big the sugar spike is.
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· 10 min read · 14 sources
The worry is that chewing gum makes your body release insulin as if food were coming, which would matter if you are fasting. Chewing does send that signal, with saliva and gut hormones. When researchers measured the insulin, it had not moved.
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· 11 min read · 13 sources
Every human trial of nattokinase, read and reported: what it does for plaque, blood pressure and clotting, and where the best trial found nothing.
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· 2 min read · 3 sources
Independent lab testing is the only practical way to check a supplement contains what its label claims. Published analyses keep finding ones that do not.
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· 6 min read · 7 sources
The radiation has been measured in thousands of people and nothing turns up. The device does turn up, and almost all of it is the half hour you spend holding it in bed.
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· 6 min read · 8 sources
We screened 324 controlled trials. The strap itself has never been tested, and in the one sham trial the fake shirt outperformed the real one.
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· 6 min read · 4 sources
Grip strength predicts death better than blood pressure does. A real finding from huge cohorts, and widely misread. What it measures and what it does not.
Read articleKratos Natural is the shop and research arm of Liam Kratos, orthomolecular therapist and longevity coach. We sell natural products and publish the research behind them.
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