I want to study IGF-1 effects on mice muscles with accelerated sacropenia. 

I see people have tried I/M injections or placing time release pallets of IGF-1 next to the gastrocnemius muscle. Can somebody tell me which one is the more effective method against systemic administration of IGF-1 via I/P or S/C injections?

Also, is there any good link for buying the pallets of injectable IGF-1?

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