First of all, alcohol is bad for your testosterone levels. In this study, results showed that men, when exposed to high levels of ethanol, not only experienced direct testicular decline in testosterone, they also experienced an adrenal rise in cortisol which in turn lowered testosterone further.
Beer is much worse than most other sources of alcohol for your testosterone because it decreases your testosterone while also raising your estrogen more profoundly than other alcoholic drinks. The ultimate anti-man cocktail.
The rise in estrogen COULD BE due to the previously mentioned hops. Hops are extremely estrogenic. (5) In this study, women were asked to simply hold hops in hand. The results showed that the women holding hops experienced disturbances in their menstrual cycles due to the high levels of estrogen. According to researchers, this is due to a type of phytoestrogen in hops called 8-Prenylnaringenin (8-PN).
Many studies and instances are used to support the idea that hops are the main cause for beer raising estrogen levels. What I’ve mostly seen are stories of women working in fields with hops who have irregular menstrual cycles due to the estrogen exposure. (6)
I believe this and totally think it’s real.
I also see references to “brewer’s droop” where men who work in breweries have sexual dysfunction due to extended exposure to the phytoestrogen in hops. (6)
I believe this and totally think it’s real.
The problem that I have with referencing these instances is that they have nothing to do with the average man drinking a beer. In an article published by Brauwelt International, the following was stated:
“If one links the very simple comparison between the value of 0.24 mg/l maximum concentration hitherto found in beer and the effective quantities of 15 and 30 mg of 8- prenylnaringenin per day and kg of body weight determined in animal trials, it would follow that humans would have to consume more than 1000 l of beer daily to achieve detectable estrogenic effects.” (7)
This was after testing extensively the amount of phytoestrogen that is actually contained in the beer we drink. This is supported by the findings in the study, which stated that the amount of 8-Prenylnaringenin found in a hops field would cause menstrual disturbances, but the amount of 8-Prenylnaringenin found in beer should be no cause for concern.
There is no doubt that hops have an estrogenic effect on the human body, but it seems to me that there are not enough hops in beer for hops to be the chief culprit. If you are still worried about the amount of hops in your beer, lay off the IPA’s, which are notoriously hoppy beers. (5)
Even then, if you’re worried about the amount of phytoestrogen in your beer, remember that phytoestrogen is also present in soy, wheat, beans, carrots, potatoes, coffee and marijuana. (8)
Is Another Ingredient to Blame?
Let’s look at another ingredient: barley.
Barley is a prolactin. Prolactin is the hormone that increases female breast size during puberty and promotes breast lactation in motherhood. (5) Prolactin also has an effect on male breast size and consumption of a fair amount of barley could result in what are known as the dreaded “man boobs.”
What About the Beer Gut?
As stated before, any alcohol decreases your testosterone levels. When testosterone levels are low, multiple things happen.
One is that estrogen levels tend to control your fat storage, which would explain the presence of fat in the chest and midsection. Another is that insulin levels rise, which will cause an increase in belly fat. More fat means your body will convert more testosterone into estrogen. In addition to estrogen’s contributions, when you are drinking a high calorie alcoholic drink like beer, there will naturally be more fat stored than a lower calorie drink. Makes sense.
Alcohol also increases appetite.(9) No one has a beer without a snack. When you drink alcohol, the liver works on processing the alcohol and not on processing your calories, so they are stored as fat. Eating with alcohol is not a good plan if you plan on losing fat. (10)
The Point
Despite many blog articles and forum posts stating that beer is turning you into a woman because of the hops in your beer, you don’t have to blame German Protestants for your man boobs.
Beer is known to bring out womanly body features because of prolactin in barley in conjunction with low testosterone, increased estrogen levels caused by alcohol processing in the liver, the high calorie count in beer, and the snacks you tend to eat while drinking. Yes it is a lot, but all of it together really just leads to one statement:
Drinking beer regularly will raise your estrogen levels and will eventually lead to the gut and boobs you fear.
Interestingly enough though, due to its estrogenic effects, even the small amount of hops in beer can have positive effects on women. (11) The small amount of phytoestrogen can act as an aphrodisiac for women and, if consumed regularly, can mimic real estrogen, increasing female sex drive. Of course, the boob-enhancing effects of prolactin aren’t ALL bad.