I am planning to Buy Shilajit, but I am finding it hard to know which products are trustworthy. Some sellers talk about purity, while others do not explain how their products are tested. I want to avoid wasting money or choosing something with poor quality. How can I check whether shilajit is properly purified and tested for harmful substances? I would appreciate honest suggestions from people who have researched this topic. What should a beginner check first?