No fear of virus and vaccination

Editorial note (2026): This article dates from spring 2021 and is a historical document from the pandemic. We have written down here how we look back on that period and the research available at the time today—with considerably more sober eyes: The story behind Cistus+ and Imun Guard.

We are here in a rockrose meadow. I have been studying this plant for many years, and I am continually amazed by the many positive personal accounts associated with it. I have personally experienced repeatedly how impending colds ran a mild course for me—one subjective personal observation, nothing more. Whether any of this can be extrapolated to other viruses is simply unknown. That would first need to be investigated—and there can explicitly be no talk of protection against coronavirus.

Study by the University of Regensburg, published in Scientific Reports (Nature portfolio).

Placebo-controlled double-blind study with 160 participants on upper respiratory tract infections.

I have been using rockrose extract for many years. When the pandemic broke out, I was surprised by how sharply demand for rockrose extract suddenly increased. So we started thinking about what a “Rockrose Extract Plus” might look like. Could this fascinating plant, at least to me, be combined with other plant extracts and substances?

At the time, there was some initial research on the individual ingredients—importantly, reviews and hypothesis papers on the individual substances, not evidence of efficacy for our combination, and certainly none against COVID:

Review of medicinal plants and viral diseases.

Hypothesis paper on Nigella sativa (black cumin) and zinc.

Sunny greetings from the Healing Garden in Tenerife (:

You can find more about the ingredients, research, and our experience with Cistus in our comprehensive Cistus overview.