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Answer: Like all plant products, the characteristics of herbs vary from season to season and year to year depending on the environment in which the herbs were picked. Naturally, it is normal for the resulting granules to vary slightly in color, texture or aroma, reflecting the variations in the source herbs from which they were produced. KPC’s herb granule extracts are produced in batches with each batch assigned a unique lot number, which can be found in the bottom corner of the bottle’s label.