Is supraneuron safe for 21 years old?

Supraneuron is not a widely recognized medication or treatment, and it may not be approved for general use or could be a specific brand or formulation not well-documented. If you mean "supraneural" in a broader medical context, it's essential to consult a healthcare professional for personalized advice. Safety can depend on various factors, including individual health conditions, potential interactions with other medications, and the specific context of use. Always seek guidance from a qualified healthcare provider before starting any new treatment.