The bright green colour of Melrose Clean Green Organic Barley Grass Tablets reflect the abundance of chlorophyll as well as its natural source of magnesium. As chlorophyll is sensitive to light, opaque containers have been used to prevent oxidation.

Not all Barley Grass leaves are harvested at their nutritional peak. Since 1935 scientists have known that the highest concentrations of nutrients are present for just a few critical days. By the time the young sprout reaches its nutritional peak it is between 6 and 8 inches tall. It then forms a joint that goes on to form the stalk of the grain.

At harvest, only the top 10 centimetres of the grass are harvested because this section has the richest content of nutrients. Harvest occurs just prior to jointing. Once jointing occurs, the nutritional level in the leaves begins to drop as the shoot's nutrients are used in the growth and development of the head of the grain. Once harvested, the grass is then powdered in a special air mill at room temperature.

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