Question about Green Smoothies

I make a Green Smoothie almost daily. I make it with a banana and almond milk. Lately I have heard cautions about this. (the green protein drink not the banana and milk).

Can anyone enlighten me?

Thanks!

I have read twice now about overdoing the oxilate intake and overworking the kidneys.

I am using a brand called vim. It is a super food powder with 20 grams of plant protein. I use it and Great Lakes collagen to make a smoothie.

I just thought it was a great way to get some plant protein as I am not a big greens person. Now I am wondering if I should maybe just do a few times a week instead of every day.

Sorry I wasn't clearer on the question...

I don't use spinach at all, because it has the higest llevel of oxilates.

Also, I often steam green vegetables, as it reduces oxilates level.