I’ve been blogging for over three years and Cold-fX, a popular Canadian ginseng supplement, was one of the first topics I tackled. The omnipresent Canadian advertising, huge pharmacy presence, and impressive-sounding efficacy claims made it an ideal case study. Perhaps not surprisingly, when I reviewed the data, the results didn’t hold up: I concluded that in a best case scenario, you’d need to take Cold-fX for four cold seasons (about 16 months) to prevent a single cold. And while the manufacturer claimed that Cold-fX could actually stop colds once they’d started, I noted that there was no published evidence to back up that claim. I concluded there was was little rationale to justify supplementing with Cold-fX. The published clinical evidence wasn’t persuasive, and the supplement is not inexpensive. The smarter strategy? Washing your hands regularly is clinically proven, and it’s a lot less expensive.
Since my review, the popularity of Cold-fX has continued unabated. And the manufacturer has branched out into all kinds of supplements: Cell -fX (shark cartilage), Cold Sore fX (bee propolis), Remember-fX (also ginseng), Memory-fX (more ginseng), and Immunity-fX (ginseng again, but with with reishi mushroom). Skeptical yet? So was CBC’s Marketplace, which scrutinized Cold-FX in a episode broadcast earlier this month. (I can’t embed the video, so you’ll need to watch the video at the CBC’s site.) For those of you that haven’t seen Marketplace, it’s a consumer affairs/consumer advocacy show that takes on medical topics from time-to-time. Last year it did an excellent investigation of the elaborate placebo system known as homeopathy. The producers are clearly science and consumer advocates, making natural health products low-hanging fruit. So Cold-fX was a fitting topic. Their investigation focused on several issues: Continue reading