If you search the market, you will find varieties of Goji berries, but finding the pure form is a tough job. That’s why; it is recommended that stock up the pure goji berries before the supply of pure goji berries ends in the market.
The pure form is the Tibetan Goji berries which are harvested as per the wild crafting technology. These berries are found in distant hills of Tibet and Mongolia. Here the soil is very rich and there is no pesticides put in it. So you get the natural and pure form of goji berries.

Once you have tasted these natural goji berries, then you can feel that they are the best berries in taste and quality.
These Goji berries are available in limited supply as they are cultivated once a year. If the supply runs out, then one will have to wait for next year's season of harvest to get pure form of goji berries. In order to maintain the purity and quality of gojis, they are washed and cleaned in industrial standard rotating drums which are facilitated water jets. It is done so as to clean it from bacterial contamination.