Interpretating Peptides, Food Intake, and Body Weight

- POSTED ON: Mar 31, 2013

Today I watched a technical, but interesting, video of a University lecture given on March 26, 2013 by Stephen C. Woods about Peptides, Food Intake and Body Weight: Problems of Interpretation.

Peptides are organic substances of which the molecules are structurally like those of proteins, but smaller. Peptide Hormones include insulin, leptin, ghrelin, glucagon, growth hormone, obestatin as well as many, many others.

For many years Dr. Woods has been involved in obesity scientific research, primarily re insulin.

He said that a key question is whether the Responses that counter drug/food effects are actually Unconditional, invariant and whether or not traditional concepts of Homeostatsis are viable.

In considering this question, note the following:

Homeostaisis --- Unconditioned stimulas equals Unconditioned Response.

There are ...

Homeostatic Controls - Hypothalamus (part of the brain primarily involved with involuntary stimulas and response of Peptides)


Non-Homeostatic Controls – Amugdala, Accumbens, etc ( parts of the brain involving Anxiety, social situations, learning, hedonics, etc.)

The process of Homostaisis can be disturbed by Non-Homeostatic Controls.

Food intake involves BOTH types of Controls at the same time. Food intake is a Behavior which involves BOTH (unconditioned) physiological and (conditioned) psychological factors: An Example of a Conditioned stimulas and Conditioned response is Pavlov’s dog.

Based on his many years of involvement with scientific research re Peptides, Dr. Woods states the following Conclusions:

Conclusion 1:
Different labs get different results when administering Peptides and assessing food inake.

Conclusion 2: 
Peptides alter food intake in some situations and not others.

Conclusion 3:
The ability of a Peptide to alter food intake varies within the same lab.

Conclusion 4:
Subtle, or not so subtle, environmental factors can determine whether a Peptide influences food intake, and can even reverse the direction of the response.

To watch the lecture click the following link: Peptides, Food Intake and Body Weight: Problems of Interpretation.

Leave me a comment.

Please Login to comment on this blog.

Existing Comments:
<< Previous Blog
Search Blogs
DietHobby is a Digital Scrapbook of my personal experience in weight-loss-and-maintenance. One-size-doesn't-fit-all. Every diet works for Someone, but no diet works for Everyone.
- View 2021
- View 2020
- View 2019
- View 2018
- View 2017
- View 2016
- View 2015
- View 2014
- View 2013
- View 2012
- View 2011

Mar 01, 2021
DietHobby: A Digital Scrapbook.
2000+ Blogs and 500+ Videos in DietHobby reflect my personal experience in weight-loss and maintenance. One-size-doesn't-fit-all, and I address many ways-of-eating whenever they become interesting or applicable to me.

Jun 01, 2020
DietHobby is my Personal Blog Website.
DietHobby sells nothing; posts no advertisements; accepts no contributions. It does not recommend or endorse any specific diets, ways-of-eating, lifestyles, supplements, foods, products, activities, or memberships.

May 01, 2017
DietHobby is Mobile-Friendly.
Technical changes! It is now easier to view DietHobby on iPhones and other mobile devices.