Accessibility StatementSkip Navigation SALT LAKE CITY, Oct. 16, 2025 /PRNewswire/ -- USANA (NYSE:USNA), a global leader in cellular nutrition, is bringing a little more sunshine to wellness. Its top-rated Vitamin D supplement has officially earned the prestigious ConsumerLab.com Seal of Approval—a recognition reserved for products that deliver on purity, potency, and scientific precision. With approximately 42% of adults in the United States considered vitamin D deficient, having a vitamin D supplement on t ...