Is it permissible to consume creatine derived from meat, given that its source is unknown (whether it is from pork or not), and what should one do if they have already consumed it without knowing its source?

Creatine is a fundamental component for energy production in muscles, increasing their performance capacity. It is found in small quantities in meat and in plant products. Its ruling follows the ruling of imported meats. It is permissible if it is derived from non-meat sources or from permissible meats, or if it is from impermissible meats but has undergone a complete transformation (istihalah) from its origin. Anything other than that is forbidden.