He challenged 12 manufacturers or distributors of the most dangerous products, calling them “the Dirty Dozen” in an effort to force manufacturers to reformulate their products or pull them from the market. The following year, Steinman wrote Living Healthy in a Toxic World: Simple Steps to Protect You and Your Family from Everyday Chemicals, Poisons, and Pollution (Perigree, 1996). TV actress Kirstie Alley wrote the foreword of the book.
Since 1996, Steinman has been an advisory board member for The Green Guide Institute, a national non-profit, organization for consumer research and information run by Wendy Gordon Rockefeller. In 1997, Steinman founded Freedom Press, a publishing house for books and magazines on health and the environment. He also become editor and publisher of the popular science-based health magazine The Doctors’ Prescription for Healthy Living, distributed nationally to health food stores, doctor’s offices and select bookstores.
In 2000, Steinman served as Chairman of Citizens for Health, a national nonprofit consumer advocacy group known as the voice of the natural health consumer.
In February 2007, Steinman led a press conference at the National Press Club in Washington, D.C. regarding the presence of the undisclosed carcinogenic petrochemical 1,4-dioxane in children's and adults' bath and beauty products. The press conference, held jointly with the Campaign for Safe Cosmetics and with participation from the Environmental Working Group, called for official FDA oversight of the cosmetics and personal care products industry.
In March, 2008, Steinman led a similar press conference with the Organic Consumers Association at the Natural Products Expo in Anaheim, CA regarding the presence of 1,4-dioxane in "organic" and "natural" personal care products. This press conference led to the California Attorney General suing four companies with 1,4-dioxane in their cleaning and/or personal care products in June, 2008.
On March 6, 2009, Steinman and the Organic Consumers Association announced at the Natural Products Expo that 16 major brands had cleaned up 1,4-dioxane from 23 of their products, and that they would bring legal action against several brands whose products still had high amounts of the chemical.
On March 12, 2010, Steinman and the Organic Consumers Association, in cooperation with the Campaign for Safe Cosmetics and Clean Water Action, announced at the Natural Products Expo that Proctor & Gamble had agreed to reformulate 18 of their Herbal Essences products to reduce levels of 1,4-dioxane to 10ppm (parts per million) or below. They also released results of a new study testing 20 laundry detergents for 1,4-dioxane which found the highest levels in P&G brands Tide, Tide Free, and Ivory Snow.
In January, 2008, Steinman began to host the Internet radio show Green Patriot Radio with David Steinman on www.webtalkradio.net
In 2008, Steinman also wrote the introduction to 50 Simple Steps to Save the Earth from Global Warming by the Green Patriot Working Group.
As a journalist, Steinman has won awards for his reporting from the California Newspaper Publishers Association, Sierra Club, and the Society of Professional Journalists (“Best of the West: Environment and Natural Resources Reporting”). He is often featured as a consumer health advocate in the media on TV, radio and in the press.
Steinman has three children and lives in California.