While considered natural and safe, it's crucial to avoid raw or unprocessed shilajit due to potential contaminants. Purchasing purified shilajit from reputable sources is recommended. Individuals with certain health conditions, such as sickle cell anemia, hemochromatosis, or thalassemia, should avoid shilajit. Additionally, if allergic reactions occur, such as rash, increased heart rate, or dizziness, discontinuation is advised. Careful research on product quality and source is essential as shilajit is not monitored by the U.S. FDA for quality, purity, or strength.