Here's something the Fat,sick, and nearly dead website has to say about protein:
(go here for the full article):
http://www.rebootwithjoe.com/protein-the-reboot-setting-the-record-straight/
"Many vegetables have some but not all 9 amino acids and are called, “incomplete” proteins. There are, however, many excellent plant-based foods that are complete proteins."
and
"The goal is to consume a wide variety of plants day to day to naturally match up incomplete proteins over the course of a few days, to create complete proteins. This will provide all the necessary building blocks in a timely fashion for the body to work with."
and
"Clinically speaking, it is highly unlikely a healthy person will develop a protein deficiency in the time frame of the posted Reboot programs (5-15 days).
Green juices in particular are rather rich in protein, making them a cornerstone of any Reboot program. The amount of vegetables eaten during the Reboot for those who are eating + juicing, helps bump up the amount of protein an individual will consume in a day during their program.
Can I add protein powders during a Reboot?
If you feel you need more protein it is OK to include protein rich additives in your juice, as desired. It may not be necessary, but the Reboot is meant to be deeply personal and we support everyone’s choices when it comes to creating what works best.
Examples of situations where you may wish to add more protein to your juices include:
-Frequent or intense exercise
-Diabetes, pre-diabetes, insulin resistance, PCOS or other blood sugar regulation needs
-Hunger control issues that persist well into the Reboot, after increasing the amounts of juice and water consumed
Ideas for Reboot friendly additives to juice
-Chia seeds
-Hemp seed powder
-Ground flax seeds
-Spirulina
-Pea protein powder
I’m concerned about losing muscle mass during my Reboot.
Consuming protein rich vegetables and juices can help to maintain muscle mass while you are Rebooting. Walking and doing light weights can also help to preserve muscle mass. Juice and plant foods provide a big boost of nutrient dense meals and snacks so that overall nourishment is generally maintained during your Reboot. Not everyone loses a lot of muscle, even with a large amount of body weight lost during their Reboot. For example, Joe’s 100 pound weight loss during his 60 day reboot we saw in Fat, Sick and Nearly Dead, was 70% body fat and 30% muscle."
So, it seems that in order to preserve muscle, you need to juice with lots of protein rich veggies like kale (green juices) and less fruit based juices or add some protein powder or another extra source of protein for those that might have a greater need.