Vitamin D deficiency remains a widespread health concern, prompting interest in new ways to help people maintain healthy levels of the nutrient. A recently FDA-cleared device called the Solius Pro is now entering the consumer market, promising to stimulate the body’s natural vitamin D production using carefully controlled ultraviolet B (UVB) light rather than extended time outdoors.
The launch comes as research continues to show that many adults struggle to maintain adequate vitamin D levels. Deficiency has been linked to poor bone health, weakened muscle function and reduced immune support, with certain population groups experiencing significantly higher rates than others.
Photo Credit: Solius
How the Device Works
Unlike natural sunlight, which contains both UVA and UVB radiation, the Solius Pro is designed to deliver only UVB wavelengths that trigger vitamin D production in the skin. Before each treatment, the system analyzes the user’s skin tone and adjusts the exposure accordingly.
According to the company, a typical session lasts about five minutes and is intended to be used once a week. The system also incorporates safety features, including protective eyewear detection, distance monitoring, automatic treatment limits and personalized dose adjustments based on previous skin responses.
The device has received FDA clearance for over-the-counter use by adults aged 22 and older under a newly established product classification.
Why Vitamin D Matters
Vitamin D plays an important role in helping the body absorb calcium and phosphorus, nutrients essential for maintaining healthy bones and teeth. It also contributes to muscle performance, immune function and nerve health.
Health experts generally recommend that adults consume around 600 to 800 international units (IU) of vitamin D each day. While sunlight naturally helps the body produce the vitamin, the amount generated varies considerably depending on factors such as skin pigmentation, geographic location, season, time of day and the amount of skin exposed.
Clinical Findings and Company Claims
Solius cites clinical research showing participants experienced an average 76% increase in vitamin D levels after using the technology. The company argues that controlled UVB exposure offers a more direct way to stimulate the body’s natural vitamin D production than oral supplements, which depend on digestion and absorption.
The manufacturer also says its technology dramatically reduces unnecessary ultraviolet exposure by excluding nearly all UVA light, the portion of sunlight most closely associated with skin aging. According to the company, a full year of recommended use results in ultraviolet exposure comparable to only a few minutes of midday sunlight.
Dermatologists Remain Cautious
Despite the device’s clearance and encouraging early data, dermatologists say consumers should not assume the technology is necessary for routine wellness.
Medical specialists acknowledge that narrowband UVB therapy has long been an established treatment for skin conditions such as psoriasis and eczema. They caution, though, that using UVB primarily as a vitamin D booster represents a different application with less long-term evidence.
Photo Credit: Solius
Experts also emphasize that UVB radiation still damages skin cells, even when exposure is carefully controlled. While personalized dosing may reduce some risks, they note that no form of ultraviolet exposure is entirely risk-free.
Supplements and Diet Still Play a Major Role
For most healthy adults, physicians continue to recommend obtaining vitamin D through a combination of diet, supplements when appropriate and sensible sunlight exposure.
Foods naturally rich in vitamin D include fatty fish, egg yolks and beef liver, while fortified dairy products and cereals also contribute to daily intake. Supplements remain widely available and do not carry the ultraviolet exposure associated with light-based therapies.
What Comes Next
The introduction of Solius Pro highlights growing interest in personalized health technologies that aim to replicate specific biological benefits of natural sunlight while limiting potential harm.
Whether such devices become a mainstream option for addressing vitamin D deficiency will likely depend on additional independent research, long-term safety data and how healthcare professionals ultimately view their role alongside established treatments. For now, specialists say the technology may offer an alternative for some adults, but it is unlikely to replace conventional approaches to maintaining healthy vitamin D levels.
