A Skin Carotenoid Reading
for Your Next Session.
Prysm iO is a non-invasive wellness insight tool that estimates skin carotenoid levels with light, to start a conversation about nutrition and lifestyle. It is not a medical device and does not diagnose, treat or screen for any condition. A scan takes about 15 seconds. It does not change your assessment methods or your counseling approach. For dietitians who want it, it is a simple, visual talking point to use next to the food-first guidance you already give.
- One fingertip scan gives each client a personal wellness reading to follow over time
- A shared reference point to sit beside the food-first guidance you already give
- Entirely your call: how, whether and with whom you use it stays a professional decision
No obligation. A short conversation is enough to see whether Prysm iO belongs in your practice at all.
Clients Hear Plenty About Nutrition. Few Have a Number of Their Own.
The people who come to you for dietary guidance are often also reading labels, trying new products and following advice from every direction. As a dietitian you already hold a protected title and work from evidence, so you are the person they should be able to ask. Prysm iO offers one extra, optional talking point: a quick, non-invasive scan that turns skin carotenoid levels into a wellness reading clients can follow over time, next to everything else you do.
1 reading
A personal starting point for each client, which can be revisited at later sessions alongside their own goals
15 sec
From fingertip to a personal wellness reading - short enough to fit inside a regular counseling session
$200B+
Global dietary supplements market - a space where your clients meet a great deal of marketing and very little neutral guidance
What Does a Colorful Plate Look Like on the Skin?
Ask most clients whether they eat plenty of vegetables and they will say yes, yet recall is imperfect and a food diary only tells part of the story. Carotenoids are the pigments in orange, yellow and red produce and leafy greens, and they collect in the skin. Prysm iO reads that pigment with light, giving you a picture to talk through alongside what the client tells you.
Products arrive on trust
Clients often start a supplement because of a headline or a friend's tip. As a registered dietitian you are well placed to ask what they are taking and why, and a visual reading can make that conversation more concrete for some of them.
A personal reference, not a verdict
Each reading belongs to that one person and is meant to be followed over time, never compared against a pass mark. It is a wellness reading to be set beside diet history, preferences and goals, and it never stands in for your professional assessment.
Food stays first
Colorful fruit and vegetables are where carotenoids come from, and nothing here changes a food-first approach. Whether supplements play any part for a given client is a decision for you and that client, in line with your professional standards.
A reading is never advice in itself. It is one more reference you and your client can look at together, kept firmly beside your own professional judgment.
Products Exist Beside the Scanner. Your Standards Come First.
Prysm iO is made by Nu Skin, which also sells a range of Pharmanex supplements. Clients regularly ask their dietitian what to take, and you are the person who should answer from evidence and your professional code. Nothing on this page asks you to recommend a product. It simply describes what exists so you can judge it yourself.
Carotenoids
Carotenoids are the pigments in colorful produce, and they are what the scanner reads in the skin. Fruit and vegetables remain the everyday source.
Omega-3: EPA and DHA
Marine Omega is an omega-3 supplement supplying EPA and DHA, the fatty acids found in oily fish, to complement a varied, balanced diet.
Vitamins and minerals
LifePak is a multi-nutrient daily supplement providing a range of vitamins and minerals to complement a varied, balanced diet. Permitted product statements differ by country, so please read the label for your market.
Read the label, every time
Ingredients, amounts and permitted wording are set out on each product label for your market. As a dietitian you will want to read them in full and compare them with what an individual client already takes.
Start From What They Take Today
A client who already uses a supplement can have a first reading taken as a starting point, with no change to what they take. Any later reading is just another point on their own line, to be talked through with you in the context of their diet, medication and health history.
Bringing the conversation home
Some clients will like the idea of a device at home so families can scan together and compare plates and habits rather than scores. Nu Skin has spoken of wanting a Prysm iO in many households. You decide whether any of that belongs in your own practice.
Changes to a supplement that a client's physician or other healthcare provider has recommended should only be made with that provider's agreement. The reading is a wellness reading that sits beside, and never replaces, your own nutrition assessment.
Food supplements are not a substitute for a varied, balanced diet and healthy lifestyle. Prysm iO is a non-invasive wellness insight tool that estimates skin carotenoid levels with light, to start a conversation about nutrition and lifestyle. It is not a medical device and does not diagnose, treat or screen for any condition. Please read each product's label for its exact ingredients and amounts. In the United States: these statements have not been evaluated by the Food and Drug Administration, and these products are not intended to diagnose, treat, cure or prevent any disease.
You Already Assess the Whole Plate.
This Adds One Visual Reference.
Prysm iO is not a treatment and has no bearing on your assessment methods. It is an optional tool that sits next to your existing nutrition counseling: a scan of about 15 seconds that gives clients a wellness reading to follow over time, to go with the dietary assessment, goal setting and education you already provide.
For clients it is something concrete to talk about. For you it is a way to open a food-first conversation, with no new qualification and no change to your standard of care. Whether it fits your practice is for you to judge.
A Visual Talking Point
Some clients respond well to something they can see. A reading gives you a neutral prompt for talking about colorful produce, cooking habits and routines, without turning the session into a lecture.
Continuity Between Sessions
Clients can follow their own readings in the companion app between appointments. It is a light-touch way to revisit the goals they have set, while the plan itself remains yours and theirs to shape.
Your Choice of Role
Using the scanner is optional, and so is everything around it. Commercial arrangements raise real questions for registered practitioners, so the FAQ below sets out what to confirm with your regulator or professional body first.
A non-invasive scan, from fingertip to finished reading
Individual light measurements taken in each reading
One plain number per scan, built to be followed over time
“Your clients already trust your judgment about food. A reading is only ever a starting point for that conversation, never a substitute for it.”
A Reading You Can Point To
Prysm iO uses light to estimate skin carotenoid levels and returns a personal wellness reading in roughly 15 seconds. It involves no blood draw, no lab appointment and no special preparation.
The result is simple, and clients can follow it over time next to the guidance you already give them.
Readings are most useful when they come from the same place each time, a fingertip on the same hand, so one scan can fairly be set beside the next. A single figure is a snapshot only, and the pattern over several scans says more than any one result. The scanner connects to the Prysm iO app, which runs on an iOS or Android phone or tablet. Setting up the app takes a little time, and after that a scan fits comfortably into a session.
Prysm iO is a non-invasive wellness insight tool and is not a medical device. It does not diagnose, treat or screen for any condition, and it does not replace a nutrition assessment by a qualified dietitian.
About 15 Seconds
Non-invasive and easy to run in a consulting room, at a desk or at a community table. There is no preparation, no blood draw and no lab visit involved.
Light, Not Needles
Prysm iO shines light at a fingertip and records how the skin absorbs it, taking over 700,000 individual measurements per scan to estimate skin carotenoid levels.
One Plain Number
The measurements are converted into a single Prysm Score on a scale of 100 to 1000. It is a wellness reading to follow over time, not a pass mark, and it is meant to be read in context.
A Companion App
Clients can look back over their own readings between appointments. Ask them to use the same hand each time, so that scans can be compared with one another.
Built on Earlier Scanners
Prysm iO follows more than twenty years of skin-scanning work at Pharmanex, a division of Nu Skin. The Evidence page summarizes what has been published and, just as importantly, what has not.
For Dietitians Who Weigh the Evidence First
Prysm iO is for dietitians who are comfortable with a wellness tool that supports conversation rather than medical or treatment decisions. It is not for everyone, and a cautious, questioning approach is exactly what we would expect from a registered professional with a protected title. If your regulator or employer limits this kind of activity, the right answer may simply be no.
Private Practice Dietitians
Independent registered dietitians who like the idea of a quick, visual conversation starter and who are comfortable explaining their approach to clients up front.
Multidisciplinary Teams
Dietitians working alongside physicians, exercise professionals or wellness coaches, where a shared reading gives everyone a common thing to talk about with the client.
Food-First Counselors
Dietitians who already talk about colorful produce, cooking and routines, and who would like one concrete reference to bring into those sessions.
Community and Workplace Educators
Dietitians who give talks, run workplace wellness days or lead community sessions, and who want something hands-on that gets people curious about what they eat.
Follow-Up Focused Practices
Practices that see clients over several months and like having an easy, low-pressure thing to revisit together at each follow-up.
Curious About New Tools
Dietitians who like to look carefully at new technology, read the published work and form their own view before deciding whether it deserves a place in their practice.
Does this sound like you?
If any of these descriptions rings true, a brief, no-obligation conversation is the easiest way to see whether Prysm iO belongs in your practice.
“Look at the source, read the published work, and decide for yourself. That is how you would assess any tool, and it is how we would like you to assess this one.”
Prysm iO comes from Pharmanex, part of Nu Skin Enterprises, and follows two decades of skin-scanning devices. It picked up design and innovation recognition in 2025 from the Titan Awards, the Globee Business Awards and the Good Design Awards. Awards say something about design and ambition; they are not the same as independent evidence of benefit, and we would not ask you to treat them as such.
Read What Has Been Published, and What Has Not
Skin carotenoid readings have been studied in published research, including work by university teams that long predates Prysm iO. Some studies on Prysm iO itself were funded by its maker. Our Evidence page lists the sources, flags who paid for what, and says plainly where findings are limited.
Go to the Evidence page20+ yrs
Of Pharmanex skin-scanning development, from the BioPhotonic Scanner through to Prysm iO
25M+
Scans reported worldwide on earlier-generation Pharmanex devices
3
Industry design and innovation awards won in 2025
700K+
Individual light measurements recorded in each Prysm iO scan
Talks, Workplace Days and Community Sessions
Many dietitians spend part of their week away from the consulting room, giving talks, supporting workplace wellness days or helping at community food events. A scanner can add something hands-on to a session like that, as long as it is presented honestly and offered without pressure.
Set the scene
A small device with a light ring tends to draw curious people to a table at a workplace wellness day, a community talk or a cooking class more readily than a leaflet does.
Keep it optional
Anyone can say no. Those who try a scan do so voluntarily, and your talk or session works exactly as well for people who would rather not.
Explain the reading
Use the result to talk about colorful produce and everyday meals. Be clear that it is a wellness reading, not a health assessment, and that it says nothing about any condition.
Respect their data
Take only what you need, say why, and follow your local privacy rules and your own professional standards. Any interest in follow-up should come from the person, not from a sign-up form pressed on them.
Planning a talk or a wellness day?
We are happy to talk through how Prysm iO might, or might not, suit it.
Four Steps, No Pressure
From first message to first call, each step is meant to help you decide whether Prysm iO has any place in your practice, and to make it easy to say no.
Submit Your Details
Complete the short form with your name, practice name and contact details. It takes about two minutes.
We Read It
A member of our team reads your details within 1-2 business days to understand your practice and what you are hoping to learn.
We Get in Touch
We contact you to arrange a short call, with no obligation, at a time that fits around your schedule.
Go straight to a call
Choose a 30-minute slot that suits you. There is no need to wait for a reply.
See It in Person
We show you the device and the app, go through the published work and its limits, and answer questions about professional standards, so that you can decide with the full picture in front of you.
Choose a Package
Two packages are available: the device with LifePak Elements, or a larger bundle that adds further Pharmanex and Nu Skin products. Please read your professional code before buying anything with the intention of using it with clients. Checkout is secure and takes place on this page.
Prysm Business Starter Bundle
Prysm iO device with Beauty Focus Collagen+ Peach, ageLOC Meta, Pharmanex LifePak Tablets, Pharmanex Nu Biome Watermelon Raspberry Lemon and Pharmanex ageLOC Youth.
- 1x Prysm iO Device
- 1x Beauty Focus Collagen+ Peach
- 1x ageLOC Meta
- 1x Pharmanex LifePak Tablets
- 1x Pharmanex Nu Biome Watermelon Raspberry Lemon
- 1x Pharmanex ageLOC Youth
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Prysm iO + LifePak Elements
Prysm iO device with 5x LifePak Elements, a simple daily nutritional foundation.
- 1x Prysm iO Device
- 5x LifePak Elements
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Orders ship within the United States, and prices are in US dollars. Prysm iO is a non-invasive wellness insight tool and is not a medical device.
Frequently Asked Questions
Direct answers to the questions dietitians tend to ask, including the ones about professional standards.
Is Prysm iO Right for Your Practice?
Send the short form and we will reply within 1-2 business days - or just click to book a call at a time that suits you. The first conversation is only meant to understand your practice, answer your questions, including those about professional standards, and see whether there is any sensible fit.
Privacy: what you enter here is used to reply to you about Prysm iO and for nothing else. It is not sold or passed on for other companies' promotions, and you can ask for it to be deleted whenever you like.