Pürblack is sourced from different regions in the world. Unlike other brands that would boast of alleged premium sources of shilajit, Pürblack is made with a hybrid source. Pürblack shilajit is sourced from multiple regions. Experts test samples onsite and in the lab to check for certain attributes scientifically known to enhance the health-giving properties of shilajit. These criteria include the following: Shilajit bearing rock with white blotches are preferred. The white streaks indicate the presence of microorganisms. Many of which are responsible for several beneficial properties ascribed to shilajit. The raw mumie must contain glycine, another vital component for a beneficial shilajit supplement to be created. Shilajit will be naturally combined with impurities. That includes pollutants, dirt, dust, heavy metals, and other contaminants that can harm the body. Purification of shilajit is important to ensure safety. Any bad batches or raw materials must be discarded to guarantee safety. Other products, however, combine substandard shilajit with additives, extracts, thickeners, and artificial colors. Sadly, many manufacturers do not even make use of mature shilajit in their formulations. Believe it or not, some still rely on centuries-old ways of purifying the mumie. This practice is wasteful since extraction cannot be optimized. It is also ineffective in ridding the resin of harmful microorganisms and other impurities. What should bother you more is that even top-selling brands are selling products made of fulvic acid as the active ingredient. It is part of the humic acid component of shilajit. Although, it is inferior to others due to its relatively lower molecular weight. It is practically a fertilizer. When it enters your body, it can cause more problems than benefits.