Originally developed as an anti-obesity drug, this little fragment of growth hormone works wonders by speeding up your metabolism and torching stubborn fatespecially around the belly
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To determine how much of a drug can be delivered to the brain via the intranasal route, we compare DTE - A relative drug level in the brain after intranasal administration compared to intravenous administration - and DTP - The percentage of the relative ratio between nose-to-brain drug delivery and all possible brain delivery pathways after intranasal administration
You also mentioned earlier the fact that gene therapy is already in use for treating a type of rare childhood blindness, so it does seem like a lot of the technology that you need is available, and as you said, FDA approved, viral vectors to package the genes that you want to put into the eye, or other organs
But, injections and infusions are the most effective