The bottom line, they are looking at the hypoglycemia type link here also, as well as bp and sodium levels.
Hormones May Influence Alcohol-Seeking Behavior
The effects of alcohol on different hormonal pathways may in turn influence alcohol-seeking behavior. For example, in animals, alcohol-seeking behavior appears to be regulated in part through a system called the renin-angiotensin system, which controls blood pressure and salt concentrations in the blood. In rats, activation of this system through alcohol consumption caused the animals to reduce their alcohol intake (39). The mechanism and relevance of this effect are currently under investigation.
Alcohol and Hormones--A Commentary by
NIAAA Director Enoch Gordis, M.D.
Alcohol's wide-ranging effects on the hormone system present many practical clinical concerns. For example, managing diabetes, particularly with the current emphasis on stringent control of blood sugar, is complicated by alcohol's interference with blood sugar levels. In the emergency room, stupor in patients with alcohol on their breath often is not caused by alcohol intoxication, but by the hypoglycemia (low blood sugar) that is a complication of heavy drinking. Failure to treat the hypoglycemia could have life-threatening consequences. Heavy drinking has a major effect on the reproductive system, affecting libido, fertility, and pregnancy. Heavy drinking also places postmenopausal women at risk for fractures from falls due to their increased risk for osteoporosis from alcohol's effect on blood estrogen levels coupled with their increased risk of falling due to drinking. However, it is possible that moderate alcohol use may help protect postmenopausal women against osteoporosis by raising blood estrogen levels. Scientists are working to discover for which population this may be true and at what drinking levels. Finally, research on how alcohol's interactions with hormones may contribute to the pathological drive to consume alcohol is just beginning and may provide valuable insight into the mechanisms by which alcohol-seeking behavior can be controlled.