Your Nutrition,
Given a Score.
Prysm iO measures skin carotenoids, the colour pigments from fruit and vegetables, with a fingertip placed on the device for around 15 seconds. In moments you get a single wellness score in an app on your phone or tablet, and you can watch it move as your own nutrition and supplement habits change.
- A real reading of your nutritional wellness, not a guess or a quiz
- Scan yourself at home, whenever suits you - no appointment needed
Prices shown in your local currency automatically. Ships to markets across Nu Skin's international network.
Scan Yourself. Watch Your Score Change.
Most people have a rough sense of whether they eat well, but no real way to check it. Prysm iO gives you an actual reading: rest a fingertip on the device, wait about 15 seconds, and your app shows a wellness score built from the colour pigments in your skin. Scan again in a few weeks after changing what you eat or take, and you see whether it moved. It is not a clinical test, and it reveals nothing about any medical condition - just a number for one real part of your own nutritional health.
15 sec
Length of a single fingertip scan - short enough to do at your own kitchen counter, no appointment or lab required
29%
Share of adults in England eating at least five portions of fruit and vegetables daily in 2022 (Health Survey for England, self-reported) - most people have room to improve
100-1000
The Prysm Score range your scan produces, a single figure you can follow between scans as your own habits change
One Fingertip, One Number, About a Quarter of a Minute
The measuring is done by light. Rest a fingertip on the scanner, light passes across your skin, and roughly 15 seconds later your personal wellness score comes up on your phone or tablet. No needles, sample pots or lab forms are involved, so it fits into an ordinary morning at home.
The outcome is a single figure you can follow over time. It is not a clinical measure and reveals nothing about any condition, yet it is easy to understand and easy to come back to, which makes it a natural habit to build alongside a supplement routine.
Scan the same fingertip each time, so one reading compares fairly with the next and your trend carries real meaning rather than jumping about. The device pairs with the Prysm iO app on an iOS or Android phone or tablet, which you will need to install and learn. Beyond that, it is as at home on a kitchen counter as anywhere else.
Prysm iO is a wellness insight tool. It is not intended to diagnose, treat, cure, prevent, or mitigate any disease or medical condition, and it is not a substitute for medical assessment, diagnosis or treatment, or for dietetic advice.
Done in Under a Minute
No blood sample, no lab request and no wait for results. Rest a fingertip on the scanner and your score is ready before the kettle boils.
Spectral Rai Technology
With a fingertip on the scanner, tens of thousands of separate light measurements are captured through hyperspectral absorption, picking up carotenoid-related activity in your skin.
One Score
An AI model turns those readings into a single Prysm Score from 100 to 1000. Nothing to interpret from a printout: it is one figure you understand immediately.
A Reason to Keep Going
Between scans you follow your score in the app, which keeps nutrition front of mind and gives you a real sense of whether a change is working.
Research Behind It
Pharmanex has invested more than 20 years of research and development in skin-carotenoid scanning: 110 clinical studies, 180 white papers and 18 global patents. Few home wellness gadgets can point to that.
Give Your Nutrition
a Score to Chase.
Plenty of people intend to improve their nutrition yet have no way of knowing whether it is paying off. Prysm iO gives you a score between 100 and 1000 in the app, a figure to track between scans and watch move as your habits change. It reflects a real part of your overall health, your nutritional status, without saying anything about a specific condition or how a treatment is going.
A Number for Something That Has None
Most people track their steps, their weight, maybe their sleep - but everyday nutrition rarely gets a number. Skin carotenoid scores tend to move with fruit, vegetable and supplement intake over several weeks, so when you change your nutrition, you can see the effect instead of guessing.
Re-Scan Whenever Suits You
There is no appointment to book. Scan again after a few weeks of a new habit, a supplement routine, or just eating a bit more colour, and put an earlier and a later result side by side. It is your own private trend, on your own schedule.
A Hopeful Thread
A score you own, and can raise by adding colour to your meals, is a genuinely hopeful thing to track - and it stays clear of any diagnosis or medicine.
Worth being precise about: the score is a genuine reading of your nutritional status, a real part of your overall health, but it is not a measure of any specific condition, and a change in it is never evidence that a medicine or treatment is working better or worse.
What Is Actually in the Range
A low score tends to raise the next question: what else might help your nutrition, beyond fruit and vegetables? Pharmanex products are built around carotenoids and everyday nutrients and are designed to be highly bioavailable. Here is what the range contains, stated plainly, with no promise about your health or any medical condition.
Carotenoids, including lutein
Bright plants such as leafy greens supply lutein, one of the carotenoids. Some products in the range contain it along with other carotenoids, in forms designed to be highly bioavailable. Carotenoids are the pigments Prysm iO detects in your skin.
A fruit-and-vegetable beverage
JVi is a fruit-and-vegetable drink containing carotenoids and vitamin C, one option if your score suggests you are short on colourful produce.
DHA omega-3
Marine Omega provides EPA and DHA. DHA helps maintain normal vision and normal brain function as part of a varied diet.
Vitamins and minerals
LifePak formulas provide a broad range of vitamins and minerals, formulated to support the immune system and normal energy metabolism among other everyday functions.
Substantiated Before It Reaches the Shelf
Nu Skin says each Pharmanex formula passes through its 6S Quality Process: selection, sourcing, structure, standardisation, safety and substantiation. Substantiation means product claims rest on documented preclinical and clinical studies. Even so, what usually persuades people is their own result: scan, take the products, and watch the score move.
Let the Score Do the Comparing
Scan yourself first for a baseline. If you choose to try a Prysm-certified product, re-scan in the following weeks and see what happens. Because the scan reads carotenoids in your skin, a rising score is objective evidence that what you take is being absorbed, rather than something to accept on trust.
Nu Skin stands behind this with a Prysm Score money-back guarantee: if your score has not improved after 90-100 days on a certified, Prysm-eligible product, it is refundable, subject to Nu Skin's Terms and Conditions.
100 Million Healthy Households
Nu Skin's stated aim is 100 million healthy households, each with a Prysm iO and better shared habits around nutrition and supplements. This device is built to be used by everyone in your household, not just one person.
Where a clinician has advised a particular supplement, it changes only with that clinician's agreement. If you are on prescribed medicines or living with a health condition, speak to your doctor or pharmacist before starting one. The score is a wellness reading and never a reason to stop or swap anything a doctor, pharmacist or dietitian has recommended.
Food supplements are not a substitute for a varied and balanced diet, which should always come first. These products are not medicines and are not intended to diagnose, treat, cure or prevent any medical condition, and they do not replace medical assessment, diagnosis or treatment. Please check each product's label for its exact ingredients and amounts.
“It is fair to ask what a number rests on before you trust it.”
Three points support it. Skin carotenoids have long been used by researchers as an indicator of fruit and vegetable intake. Pharmanex has put two decades into the scanning technology built into the device. And Prysm iO has collected a Technology Innovation award (TITAN Business Awards), a Wellness Insight award (Globee Business Awards) and a Good Design Award. It is a wellness tool and never a clinical instrument, but those three facts let you answer plainly if anyone asks what lies behind it.
Yale Researchers Tested the Underlying Science
A Yale School of Public Health team independently examined the underlying skin-carotenoid science, and its 2013 paper called it “an attractive biomarker for use in human studies” that is “highly reproducible and valid.”
4.3 years younger
Average biological age difference, top vs bottom Prysm-scoring group, in an early Stanford Medicine pilot study across all 11 body systems tracked
Early-stage pilot data (n=33); full results are expected to be published by the end of 2026. Not a claim that Prysm iO diagnoses, treats, or reverses ageing.
Read the full research20+ yrs
Of Pharmanex R&D behind the science, from the original BioPhotonic Scanner to Prysm iO
110
Published clinical studies underpinning the underlying technology
18
Global patents covering the scanning method itself
25M+
Scans already completed worldwide on earlier-generation devices
2025
Achievement in Technology Innovation (TITAN Business Awards), Wellness Insight (Globee Business Awards), and a Personal-category win at the Good Design Awards
Pick Your Starting Point
Go all in with the complete wellness bundle, or start lighter with just the device. Prices are shown in your local currency, and checkout is secure and handled right here on this page.
Backed by Nu Skin's Prysm Score money-back guarantee - if your score hasn't improved after 90-100 days on a certified Prysm-eligible product, it's refundable, subject to Nu Skin's Terms & Conditions.
Complete Wellness Bundle
The device with a full Pharmanex nutrition stack, so you can start scanning and go through the range in the same order.
- 1x Prysm iO Device (with 1x LifePak Elements)
- 1x Professional Stand & Case
The device also includes a calibration disc, microfiber cleaning cloth, and USB-C charging cable. A second LifePak Elements above brings the total to 2.
A meaningful saving compared with buying each product separately.
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Prysm iO Device
Just the scanner, with a calibration disc, microfiber cleaning cloth, USB-C cable, and one LifePak Elements (90 tablets) to get you started. No stand, case, or wider bundle.
£333
Questions People Ask Before Ordering
The points people raise most before their first scan.
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