In 2004, the FDA approved the medicinal leech to help with poor blood flow. The fact that leech therapy is an ancient therapy and recently approved as a medical device shows how effective it is in the past and present.
Effective & Organic
Actually, the most healing effect of leeches is not from them sucking fluids but injecting their saliva enriched with over 100 bio-active chemicals that help rejuvenate and bring back to life areas of degeneration. The leech is used not only to increase blood flow but to suck up toxic fluids, usually consisting up about 70% toxic lymph fluid and only 20% blood.