Hey

I think its better to IP to avoid loss of quantity during the absorption phase 

Flavonoids, phenols and tannins are contained in foods, thus gavage is the "physiological way" for their administratio.

I agree with Paolo Bergamo and it is right; these compounds are contained in foods, so gavage is the best method for their administration.

Hi 

It is better to use gavage  instead of IP. Because the gavage  method is the best for compounds in the food.

yes we can inject it but gavage is the best method but if you work with IP method you can inject with IP

Go with oral gavage

Go with ip if you compare with ip and also To avoid loss and have short time for results