Dedicated to making store brand vitamins, minerals, supplements and over-the-counter drugs for America’s top retailers, Leiner became the first manufacturer to pass Shuster Laboratories’ stringent new Retail Qualification Program in February 2004. The program is the gold standard of independent audits, assuring retailers and consumers of a product’s quality.
In February 2003, Dr. Reddy’s Laboratories and Leiner Health Products announced the completion of a 15-year exclusive product development and marketing agreement. Key elements of the agreement include: An exclusive marketing partnership with Leiner to distribute OTC products, a comprehensive Rx-to-OTC product pipeline, development of innovative private label OTC products and establishment of an executive steering committee to manage product development.
On February 3, 2003 Leiner Health Products secured the marketing rights to the antihistamine Loratadine Immediate Release 10 milligram tablets which is the same active ingredient as Claritin® 10 milligram tablets Redi-Tab® through an exclusive licensing agreement with Genpharm Inc., an affiliate of Merck KGaA, and Pharmaceutical Resources (NYSE: PRX), Spring Valley, N.Y. The Claritin switch from prescription to over-the-counter (OTC) was the biggest in history.
On November 12, 2002 Leiner Health Products announced the availability of solubilized ibuprofen 200mg liquid-filled capsules. The product, formulated to provide a private label alternative to Advil® Liqui-gels®, was the first brand alternative product available to the nation's leading retailers for private label marketing.


In 1998, Leiner completed construction and officially opened the doors to its new 544,000 square foot facility in Fort Mill, South Carolina. At full capacity, the Fort Mill facility will house manufacturing, packaging and distribution under one roof.


In 1997, Leiner acquired Vita Health, a Canadian vitamin and OTC manufacturer, based in Winnipeg, Manitoba.

In 1993, Leiner was the first in the industry to introduce a line of vitamins and nutritional supplements manufactured to meet standards for dissolution and disintegration as adopted by the United States Pharmacopoeia Convention, Inc. (the "USP").
In late 1991, Booker, plc, Leiner’s majority shareholder, announced its intention to divest its interest in Leiner. The Company's management team partnered with a venture capital group, AEA Investors, Inc., to purchase Booker's interest in Leiner. The Company completed a "going-private" transaction on May 4, 1992 after a shareholder vote. Shortly thereafter, Leiner acquired Xcel Laboratories, Inc. of Elmhurst, Illinois. Xcel was a major supplier of vitamin and OTC products.
The Company acquired Classic Pharmaceuticals, Inc. of Sherburne, New York in September 1991. Classic was a manufacturer of a small group of niche OTC products that were unique in the marketplace.
In 1991, PLNP introduced a full line of products with "Proven Release", a guarantee that the products would breakdown in a finite amount of time and be released through the body's system.

PLNP continued to lead the market through product innovation with the introduction of preservative-free soft gelatin capsules and double safety seals.
 
PLNP started on an acquisition strategy in 1988, first acquiring Vita-Fresh Vitamin Company of Garden Grove, California in February 1988 and Freshlabs, Inc. of Warren, Michigan in October 1988. These two acquisitions expanded PLNP's penetration in the food trade and increased annual sales to approximately $105 million.
PLNP went public in September 1984, which created a debt-free company and gave the financial resources to expand its markets. At this time, sales were approximately $50 million a year and the Company was supplying 20 out of 25 top drug chains, 10 of the top 25 food chains and 9 of the top 15 mass merchandisers.
In the early 1980's, the Company (known as P. Leiner Nutritional Products, Inc. or PLNP) continued to expand its market leadership in the mass-market sectors through innovative new products and creative marketing plans.
In October 1979, the vitamin division of PLSA executed a "Management Buy Out" (M.B.O.) from the parent company in the UK. A group of six (6) senior executives led by Michael Leiner, Dave Brubaker and Kevin Lanigan purchased the vitamin division along with a minority equity partner Booker, plc, a British firm.
In 1976, PLSA started a strategy of selling direct to retail customers which eliminated the repackagers. The Company’s first customers were Safeway Stores, Winn-Dixie, Acme Supermarkets and K-Mart. The strategy was to sell to the top chains within each channel of distribution (drug, food, mass), establish our reputation, and then penetrate other chains within that trade class.

In 1974 and 1975, PLSA were innovators in new product ideas in SEG dosage form Siberian Ginseng, Swiss Ginseng, KLB6, etc.
P. Leiner & Sons, America (PLSA) formed its vitamin division in February 1973 when it hired Dave Brubaker to open a West Coast operation. PLSA opened a distribution center in Compton, California in April 1973 to sell vitamins and supplements SEGs to repackagers. First year sales for period ending March 31, 1974 were $2.7 million.
In 1971, Leiner, UK started selling vitamin capsules to the U.S. market through its gelatin operation in Detroit.

In the late 1960's, Leiner, UK developed rotary die soft gelatin encapsulation machines to create a captive market for its gelatin (like Gillette with razors and razor blades).

P. Leiner & Sons was a major supplier of gelatin to the pharmaceutical industry (2 piece hard shell capsules and soft gelatin capsules), food and confectionery industry (Jell-O, marshmallows) and the photographic industry (X-rays).


P. Leiner & Sons, America, Inc. moves from New York to the Detroit suburbs in the early 1960's.


P. Leiner & Sons, Ltd. opened distribution points around the world and opened P. Leiner & Sons, America, Inc. in New York in the 1950's.
P. Leiner & Sons, Ltd. moved to Cardiff, South Wales in the mid-1930's.
P. Leiner & Sons, Ltd. moved to London, England in 1910.
Parent Company founded in late 1700's in Budapest, Hungary as the manufacturer of gelatin.