Himalayan Shilajit can lower blood sugar levels and thus, diabetic patients should consult healthcare professionals before using it to avoid hypoglycemia . It contains phenylalanine and is contraindicated for individuals with Phenylketonuria (PKU), a disorder affecting phenylalanine metabolism . Shilajit increases uric acid production and should not be used by individuals with high uric acid retention to avoid kidney stones and gouty arthritis . There is a lack of safety studies regarding Shilajit use in pregnant or lactating women, hence it's not recommended for them .