USANA Health Sciences

In 1992, immunologist and microbiologist Myron Wentz moved his diagnostic testing company, Gull Laboratories, from Salt Lake City to West Valley City, Utah, and spun it into USANA Health Services, a multilevel marketing manufacturer of supplements. Beginning in 1993, Dallin A. Larsen served as USANA's vice president of sales (and later as a consultant to USANA's president and special advisor to the board of directors) before founding the MLM beverage company Monavie in 2005. USANA's products are not available through retail channels, and can only be obtained through one of its brand partnersor by direct order through the company.

On 20 February 2007, Barry Minkow, founder of the Fraud Discovery Institute, distributed a 500-page report to officials at the U.S. Securities and Exchange Commission (SEC), the Federal Bureau of Investigation (FBI), and the Internal Revenue Service (IRS) accusing USANA of operating an illegal pyramid scheme. The SEC conducted an investigation into USANA's business practices in March 2007 and found no evidence of wrongdoing, concluding its inquiry with no enforcement action recommended. Minkow acknowledged that he was shorting USANA's shares, hoping to profit from a drop in the stock price. In April 2007, a class action lawsuit was filed alleging that USANA's common stock had been artificially inflated. In August 2007, USANA was notified by the Securities and Exchange Commission (SEC) that its shares were subject to delisting from the NASDAQ due to its Form 10-Q, and was determined to be in compliance that October.

In January 2008, a shareholder suit was filed with allegations that USANA had misled investors about the sustainability of its growth and business model. The cases were dismissed, and the company was cleared by the U.S. Securities and Exchange Commission after an informal inquiry into the allegations, stating that it did "not intend to recommend any enforcement action by the Commission." Later that year, two Canadian USANA distributors were awarded $7 million in damages for their wrongful dismissal from the company. The firm had terminated their positions in 2003 because it believed the distributor had violated the companies' policies and procedures.

USANA filed suits against Minkow and his company claiming defamation and stock manipulation. USANA dropped the defamation suit and in March 2008 U.S. District Judge Tena Campbell threw out four of the five claims brought by USANA against Minkow ruling that USANA's claims violated California's anti-SLAPP law for suing Minkow for fair criticism and that USANA did not show a reasonable probability of winning on those claims. The remaining charge of stock manipulation was settled in July 2008, when USANA and Minkow reached an undisclosed settlement that included the removal of all USANA-related materials from the Fraud Discovery Institute website, a related Chinese website, and YouTube. Minkow also agreed to never trade in USANA's stock again.

In December 2010, USANA completed the application process to transfer its common stock listing from the NASDAQ National Market System, where it had traded since 1996, to the New York Stock Exchange. The transfer became official at the beginning of 2011. It received drug-establishment registration from the Food and Drug Administration to manufacture over-the-counter drugs later that year. In 2012, 91% of product sales were purchased by associates. The company acquired BabyCare Ltd., a China-based prenatal supplement company, in 2013 and announced plans to build a manufacturing facility in the country.

By 2018, USANA had reported record revenue due to growth in the Asia-Pacific region, though it recorded a 7% drop in net sales during its 2019 annual report. USANA has partnered with HealthCorps on health education for children and, in 2019, the USANA Foundation's Kids Eat program opened a facility to pack and distribute food for childhood hunger in the Utah area. In 2026, the Kids Eat program continued efforts to address childhood food insecurity in Utah by providing food bags to students and allowing businesses, families, and other organizations to sponsor participating schools. It was also announced as the official nutritional partner of the Spartan Race endurance brand in the United States. Its sales for the first quarter of 2020 declined by 2.3 percent compared with 2019 numbers.

The USANA Foundation was founded in 2012 and has provided hundreds of millions of meals in more than 45 countries. Their programs include USANA Kids Eat and the USANA Garden Towers.

In February 2019, the Ministry of Commerce in China suspended operations of all multi-level marketing companies and participants to conduct a 100-day review of the country's health foods industry due to exaggerated advertising claims and questionable products in the unregulated sector. Chinese departments initiated "Hundred Days of Action" to clean up the health market, where 49 products from various companies were revoked, 54 food business licenses of various companies were revoked, 90 business licenses of various companies were revoked, and 465 counterfeit and fake dens were destroyed. 85 companies, including BabyCare Ltd., a USANA subsidiary, signed a declaration to self-discipline and regulate operations, with BabyCare speaking at an event hosted by the Chinese government.

USANA produces three product lines: USANA Nutritionals (Cellsentials, Optimizers, and Digestion/Detox nutritional supplements), USANA Diet & Energy (Reset meal replacement shakes, protein bars, and Rev3 energy drinks), and Sensé & Celavive personal care (skin care, skin treatment, and hair & body care products).

USANA Essentials were tested in 2011 by ConsumerLab.com in its Multivitamin and Multimineral Supplements Review of 38 leading multivitamin/multimineral products sold in the U.S. and Canada. The Essentials passed ConsumerLab's test, which included testing of selected index elements, their ability to disintegrate in solution per United States Pharmacopeia guidelines, lead contamination threshold set in California Proposition 65, and meeting U.S. Food and Drug Administration (FDA) labeling requirements.

USANA began using InCelligence Technology in August 2016 and registered it as a U.S. trademark in March 2017. The technology is used in the company's CellSentials nutritional supplement system, including its Core Minerals and Vita-Antioxidant products, which USANA markets as using its InCelligence Complex to support cellular protection and renewal. As of 2019, its products are marketed in the United States, Canada, Australia, New Zealand, Hong Kong, Japan, Taiwan, South Korea, Singapore, Mexico, Malaysia, the Netherlands, the United Kingdom, the Caribbean, Puerto Rico, Philippines, France, China, Spain, Italy, Germany, Romania, Denmark, Colombia and Indonesia.