We purchase only the freshest, finest herbs available from the Republic of Korea, India, Nepal and China. Herb conformity and origin is verified by experienced botanists, in Korea and Japan.

In a process used exclusively by BioSpectrum, volatile oils are removed and later reintroduced. The plant mass is cooked or submerged in large vats of water, alcohol or a mixture of them in a closed and controlled environment (pH-monitoring, decoction time-monitoring). The extraction and condensation process result in an extracted liquid (generally 10x) final products.

The liquid extract is pumped to reservoirs on its way to the low temperature evaporator, where it will be further concentrated. Low temperature is essential to preserve unsteady active ingredients. Equable concentration of the plant's distinct components depends entirely on the slow path of low temperature evaporation. The liquid extract is filtered and vacuum packed after checking its microbiological contamination. It is further stabilized and bottled in the laboratory of BioSpectrum Life Science Institute. Liquid extracts are subjected to the same strict testing procedures as the dry extracts.

Like all other raw materials, the tinctures or the dry extracted powders are subject to strict quality control. Each batch is examined carefully in our analytic laboratory. The extracts are stored in stoneware or glass containers in our special storage cellar until used in the products.