This wasn’t the article i read, but it’s pretty good nonethelss:

Scientific American:

Snake Oil Salesmen Were on to Something

Snake oil really is a cure for what ails you

Richard Kunin, a California psychiatrist with a background in neurophysiology research, became intrigued with the idea of snake oil in the 1980s. He had been following early research on the importance of omega-3 fatty acids for health and it dawned on him that the much maligned snake oil might be a particularly rich source. Omega-3’s proliferate in cold-blooded creatures that live primarily in cooler environments because the fats don’t harden in chilly water like omega-6 fatty acids do (hence, the high level of omega-3’s in cold-water fish such as salmon). “Snakes and fish share one thing, they’re both cold-blooded animals,” Kunin says.

Kunin visited San Francisco’s Chinatown to buy such snake oil and analyze it. He also acquired two live rattlesnakes and extracted their fat sacks. According to his 1989 analysis published in the Western Journal of Medicine, Chinese water-snake oil contains 20 percent eicosapentaenoic acid (EPA), one of the two types of omega-3 fatty acids most readily used by our bodies. In comparison, the rattlesnakes had only 8.5 percent EPA. And salmon, one of the most popular food sources of omega-3’s, contains a maximum of 18 percent EPA, lower than that of snake oil.

Research since the 1980s has demonstrated the necessity—and efficacy—of omega-3 fatty acids. These acids not only reduce inflammation, such as arthritis pain, but also improve cognitive function and reduce blood pressure, cholesterol and even depression. “

etc.