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"Arnica creams are ambiguous hybrids using weaker dilutions that make them both (1) normal herbal products as well as (2) homeopathic. And yet the flagship ingredient, arnica, is diluted to a truly homeopathic degree (very, very diluted). Thus arnica creams are usually mainly homeopathic, while still being a little bit herbal. In this article, I will look at both sides of this split personality." Article by Paul Ingraham, PainScience.com (27 July 2015)