📰 Popular Nutrient Concentrates & Ads of the 1930s

Fleischmann’s Yeast (Standard Brands, USA)

• Product: Fresh yeast cakes promoted as a rich source of B vitamins.
• Advertising: Full-page ads in magazines like Good Housekeeping and newspapers across the U.S., urging readers to eat yeast daily for “clear skin, pep, and vigor.”

Ironized Yeast Company (USA)

• Product: “Ironized Yeast Tablets,” a blend of brewer’s yeast and iron.
• Advertising: Aggressive campaigns in the 1920s–30s promised weight gain, strength, and relief from “nervous exhaustion.” Ads were ubiquitous in pulp magazines and comic books.

Parke-Davis (Detroit, USA)

• Product: Metagen vitamin blends, desiccated liver tablets, and cod-liver oil preparations.
• Advertising: Positioned as professional, “doctor-trusted” remedies; ads often appeared in medical journals as well as consumer outlets.

E.R. Squibb & Sons (USA)

• Product: Cod-liver oil tablets, vitamin A&D concentrates.
• Advertising: Marketed for children’s bone and tooth development; Squibb stressed purity and pharmaceutical rigor in its ads.

Rowell Laboratories – Burbot Liver Oil (Minnesota, USA)

• Product: High vitamin A&D oil from freshwater burbot liver.
• Advertising: Niche promotions in Midwestern outlets, praised as a cheaper and potent alternative to cod-liver oil.

Schiff Bio-Foods (Detroit, USA)

• Product: Whey protein concentrates, brewer’s yeast, liver tablets.
• Advertising: Early brochures and pharmacy ads highlighted “scientific preparation” and the benefits of whole-food nutrition, often paired with testimonials about renewed vitality.

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