Karen Allen, CCH was drawn to Homeopathy after a seeing remarkable response in an illness for one of her children; she enrolled and graduated from Pacific Academy of Homeopathy in 1994. In practice, her focus of interest is in reproductive and endocrine health issues, especially those that impact fertility.

She has taught homeopathy at Bastyr University, the American Medical College of Homeopathy, and many other homeopathic schools. She is a frequent presenter at regional, national, and international conferences.