A study conducted by the University of Texas Southwestern Medical Center in the USA discovered that a fat called palmitic acid, found in beef, butter, cheese and milk, can cause the brain to ignore appetite suppressing signals for up to three days.

Researcher Dr. Deborah Clegg said the chemistry of the brain can change in a very short time, stating, “Since you're not being told by the brain to stop eating, you overeat.”

Such detrimental habits have obvious implications for one of society’s greatest ills today, which is obesity.
Dr. Clegg and colleagues at the University of Texas Southwestern Medical Center, many thanks for this revealing research.

May such revelations about the harmful properties of beef and dairy motivate many to switch to the proven health of the plant-based diet.

Reference
http://www.reuters.com/article/lifestyleMolt/idUSTRE58E0W320090915
http://www.telegraph.co.uk/health/healthnews/6194284/Junk-food-makes-you-eat-more-research.html