A new smart necklace, called The90 Gem, has been released that tracks real-time ultraviolet (UV) light exposure to offer personalized sun-care guidance. Priced at $299, the device aims to help users manage their sun exposure to prevent sunburns, premature skin aging, and reduce the risk of skin cancer.
The necklace features a discreet charm containing an advanced sensor that measures both UVA and UVB rays. UVA rays contribute to skin aging, including wrinkles and hyperpigmentation, while UVB rays are the primary cause of sunburns. Both types of UV radiation increase the risk of melanoma and other skin cancers. According to Dr. Helen He, co-director of Mount Sinai-Clinique Healthy Skin Dermatology Center, chronic sun exposure leads to accumulated cellular and molecular changes in the skin that may not be immediately visible but significantly increase the risk of skin cancer and accelerated aging.
To use the device, users set up a companion app by providing information about their skin type, hair and eye color, medical history, and current medications that might affect UV sensitivity. The app also inquires about sunscreen habits and self-identified sun-seeking or avoiding behaviors. This personal profile is then combined with the Gem's real-time UV readings to estimate the user's risk of burning and skin aging.
During testing, the app provided UV index readings and calculated how long an individual could safely stay in the sun before experiencing a burn. For instance, on a day with a UV index of 2, the app indicated it was a good time to be outdoors. However, as the UV intensity increased to a level of 8, the app warned that a sunburn could occur in as little as 37 minutes without protection. The device also sent reminders to reapply sunscreen, even when no immediate visible signs of burning were present.
The Gem's insights extended beyond just sunburn warnings. It alerted the user to potential skin aging risks even when indoors, as UVA rays can penetrate glass. It also provided notifications on overcast days, noting that clouds do not block all UVA radiation, thus still posing a risk for skin aging. Stacy Salvi, co-founder and CEO of The90, highlighted that weather apps often do not convey the full picture regarding UVA exposure, which is a critical component the Gem aims to address.
Beyond its protective functions, The90 Gem also tracks vitamin D exposure from the sun and estimates how long one should remain outdoors to reach the recommended daily dose. Vitamin D is essential for bone health, immune function, and other bodily processes, with a significant percentage of adults in the U.S. being deficient.
While The90 initially designed the Gem with women in mind, plans are underway to develop versions for men and children. The necklace is positioned as a discreet accessory, differentiating itself from other wearables that might occupy a wrist or finger. The company also noted that the device does not require a monthly subscription fee.
The article's author, who tested the device, found the personalized alerts effective in changing behavior and noted the potential benefit in promoting sun-safety precautions that could lower skin cancer risk. The device is seen as a valuable tool for balancing sun exposure with the need for protection and vitamin D synthesis.