Potent and pure forms of shilajit are available by following manufacturer links from Shilajit Super Tonic, as of 2016, according the website. Available products are from Premium Shilajit, Siddhi Energetics and Future Alchemy. Another source for reportedly potent shilajit is Peak Shilajit.
The product from Premium Shilajit is harvested in the Himalayan mountains of India and Nepal. It has the highest potency, effectiveness and best sourcing, claims Shilajit Super Tonic. This product is tested regularly for quality and effectiveness, as of 2016. This company works with local harvesters to help keep heavy machinery out of the mountains.
Shilajit Super Tonic by Siddhi Energetics is a combination of shilajit and other herbal essences, reports Shilajit Super Tonic. This tonic claims to promote mental and physical energy, regulate blood sugar levels, stimulate the immune system, and speed recovery from illnesses.
Pure Ladakhi Shilajit from Future Alchemy is harvested by a family of alchemists at elevations of over 3000 meters in Ladakhi, India, according to Shalajit Super Tonic. This family has been harvesting shilajit for over 12 generations. They process the raw material through ayurvedic methods, and it comes in a semi-solid form that is best taken with milk or warm water.
Peak Shilajit comes in capsule form. It doesn't contain any fillers, but it is combined with ashwagandha, a powerful adaptogenic herb, notes Shilajit Super Tonic. This combination appears to increase the benefits of shilajit.