High protein vegetarianism and IGF-1

This topic contains 2 replies, has 3 voices, and was last updated by Matrika 9 years, 5 months ago.

Viewing 3 posts - 1 through 3 (of 3 total)

MissLucyDee

9:29 am
11 Oct 14
Permalink

Hello!

I have some questions and am pretty confused about a number of things relating to the 5:2 diet. My boyfriend and I don’t eat meat, but eat quite a lot of animal protein at the moment (contradictory, I know) in the form of eggs and whey protein as we are currently weight lifting. We also eat quorn, although maybe only 1-2 times a week. We have been doing the 5:2 for about 6 weeks or so and have lost some weight, but my boyfriend has lost enough weight (sadly not a problem for me yet). My questions are:

1) IGF-1 supposed to be increased by high-protein diet? Is this caused largely by animal protein? How much damage are we doing with our non-meat animal proteins?

2) How does my partner stop losing weight while still getting health benefits? 6:1?

dheillyx

11:14 am
28 Oct 14
Permalink

There are numerous studies out there, but if you want to read them you can come to the following conclusions:
* Cow milk, soy milk and other (protein-containing) food products induce an elevation of IGF-1 in the human body
http://www.nature.com/ejcn/journal/v61/n1/full/1602494a.html
http://jn.nutrition.org/content/132/9/2605.long
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=585928

* Higher IGF-1 levels are associated with a higher colorectal, breast, and prostate cancer risk
http://www.ncbi.nlm.nih.gov/pubmed/11694656
http://news.harvard.edu/gazette/1999/04.22/igf1.story.html
http://www.medscape.com/viewarticle/522728_3

* Eating less protein lowers IGF-1 levels
http://www.sciencedirect.com/science/article/pii/S155041311400062X

* You could eat more protein from pulses.

You may keep your eggs and whey proteins (BCAAs maybe ?), some data support it:
http://www.livescience.com/45120-whey-protein-supplements.html

Your partner loses too much weight as 5:2 is too strong for him (I am in this case too). He should stick to 6:1 and not exercise on fast days.

http://www.muscleforlife.com/bcaa-supplement/

Matrika

6:28 am
15 Nov 14
Permalink

Whey protein triggers insulin which is not great, so you may like to follow through with searching out more information.
I used it thinking it was good to avoid blood sugar surges, however have ditched it since discovering the insulin spike associated cause i have extreme insulin resistnce.
Apparently whey protein powder triggers highers spikes than other forms of protein.