About Allen Laboratories Ltd Founded in 1981 by Dr.G.P. Sarkar Allen laboratories Ltd is eastern India's largest ISO 9001:2008 & GMP certified homeopathic medicine manufacturer. Allen's unique specialty and super specialty products are scientifically developed by its R&D division in collaboration with Dr.Sarkar Allen Institute Pvt Ltd with the combination of proven homeopathic lower potencies… Continue reading Allen Labs Kolkata Homeopathy product catalogue, Shop online