Does Soy Really Cause Man Boobs?
#1
Posted 28 May 2012 - 01:03 PM
I've recently become a vegetarian, so I'm eating a pretty soy-heavy diet. But I've heard too much soy can cause man boobs in a lot of guys. Any truth to that?
— Tom N., Colorado Springs, CO
Well, all men have breasts, but what you're referring to are BIG breasts as in "man titties," "Andro-Jugs" or "tasty man treats." The medical term for large breasts in a male is "gynecomastia" ("gyneco" = ladylike, "mastia" = boobies). There are a ton of causes for gynecomastia including obesity, genetics and hormones. In addition, certain medications like cimetidine (Tagamet, a medication for acid reflux) and marijuana (well, marijuana is considered "medicine" in some states . . . not where I'm from, dammit, but that's another issue) can also cause breast tissue growth. So where does soy fit in?
Soybeans are a rich source of a set of molecules called "isoflavones." These substances have weak estrogen (female hormone) activity and have been used for years as "natural" remedies for hot flashes in menopausal women. Since male transgender patients take estrogens to stimulate breast growth, it has been assumed that soy might have the same effect. This appears to be a myth, or at least is not supported in the medical literature.
Probably the greatest amount of research on the long-term effects of soy has to do with soy infant formulas. Some kids can't tolerate regular formula and get switched to formula derived from soybeans and they'll drink this stuff from infancy to one-year of age and beyond. Some kids are raised on soy milk instead of cow's milk their whole lives. A 2004 Italian study of kids raised on soy protein formulas showed no gynecomastia, no early puberty, no changes in their bones and no other signs of screwed up hormones.
I should point out that searching "soy and gynecomastia" in the National Institute of Health database only spews out three articles, but you'll be happy to know that the reproductive tracts of male macaques were not adversely affected by ingesting soy. There is one interesting case report of a 60-year-old man who developed big ol' hooters and presented to a gland clinic for an answer. His gynecomastia eventually went away when they discovered he was drinking 3/4 of a GALLON of soy milk A DAY and told him to cut it out. With all the millions of people who ingest soy daily (there are countries where soy is a staple of the "normal" diet) the fact that there is one case report of one guy whose breast tissue was sensitive to soy products is reassuring to me.
#3
Posted 28 May 2012 - 01:15 PM
Kaitlyn_Bykova, on 28 May 2012 - 01:14 PM, said:
Frightwolf needs to keep up his #1 author status SOMEHOW
Alf likes my dick. I can have him forward it to you.
#5
Posted 28 May 2012 - 01:19 PM
Kaitlyn_Bykova, on 28 May 2012 - 01:17 PM, said:
For what it's worth once I started eating heavy amounts of soy I got bigger breasts
Wouldn't that be a desirable outcome for you though?
Alf likes my dick. I can have him forward it to you.
#9
Posted 28 May 2012 - 01:44 PM
#16
Posted 28 May 2012 - 05:49 PM
#17
Posted 28 May 2012 - 07:01 PM
Xbob42, on 28 May 2012 - 05:49 PM, said:
I wonder if the tit/vagina growth is caused by, is the cause of, or is concurrent with the vegetarianism/veganism?
Alf likes my dick. I can have him forward it to you.
#21
Posted 28 May 2012 - 11:51 PM
Kaitlyn_Bykova, on 28 May 2012 - 11:47 PM, said:
I feel like you're the perfect person to opine on this matter.
Alf likes my dick. I can have him forward it to you.
#23
Posted 28 May 2012 - 11:59 PM
#24
Posted 28 May 2012 - 11:59 PM

3DS Friend Code: 5343-8030-5769
#25
Posted 29 May 2012 - 12:08 AM
Alf likes my dick. I can have him forward it to you.
#26
Posted 29 May 2012 - 12:20 AM
Lopez, on 28 May 2012 - 11:59 PM, said:
It's because most of them are obnoxious. I absolutely refuse to be in public with militant ones.
I've gone to plenty of Veggie/Vegan festivals because my bestie is vegetarian but she's lucky I even go still. She's normal and ok with people who eat meat. She'll cook me any greasy meat I want.
But a lot of the people at these things? Fuck they are some of the worst people alive. I hate all of them, especially the ones who do it cause it's hip.
I almost punched one moron at the big one in Toronto last year because of how obnoxious he was. And I would have if it wouldn't have ruined bestie's day.
I even eat vegetarian once sometimes twice a day and the militant ones still act like I'm the spawn of Satan. But back to the whole being pansies thing. It's not because they don't eat meat, it's because most of them are the kind of guy who likes anime. The kind of hipster douche who can't grow facial fair so turns to veganism instead of Marxism.
There are honestly more manly men at Gay Pride parades.
#27
Posted 29 May 2012 - 12:25 AM
Alf likes my dick. I can have him forward it to you.
#28
Posted 29 May 2012 - 12:27 AM
Kaitlyn_Bykova, on 29 May 2012 - 12:20 AM, said:
But a lot of the people at these things? Fuck they are some of the worst people alive. I hate all of them, especially the ones who do it cause it's hip.
Basically this.
Kaitlyn_Bykova, on 29 May 2012 - 12:20 AM, said:
Wait, what?
-- Thrall, Warcraft series
#30
Posted 29 May 2012 - 12:36 AM
Jason, on 29 May 2012 - 12:25 AM, said:
Yeah I can eat anywhere with bestie. We've even gone to steakhouses and she can eat. She's even got problems with gluten making eating even harder.
But Vegans? Good God. The last time I was out with a vegan and she flipped out on the poor waitress for the butter on her toast. Thats the last time I'll ever eat in public with a vegan. Just terrible people. It's fucking butter ask for new toast or TRY SPECIFYING NO BUTTER when you order.
My favourite is when vegans complain about slaughterhouses as I'm eating a fish that I caught myself. Fucking stupid individuals
#31
Posted 29 May 2012 - 12:51 AM
I do not eat meat because:
A) I find the idea of eating muscle very weird and even kind of gross
B) I'm not starving, so I don't see any reason to take away everything from an animal(s)
C) The meat industry is out of control
D) It was a challenge when I first started
E) It's really NOT that hard
F) Health reasons
To clarify: I grow facial hair like crazy, I haven't been into anime since I was like 16, and I don't use it as a social statement. If I had to explain in one sentence, I don't believe humans have some god given right to do whatever they please with "lesser" species.
#32
Posted 29 May 2012 - 12:59 AM
I don't care why you personally don't eat meat. You shouldn't care that I do. I don't believe in God but I'm not obnoxious about it like some people here are and that's how I view vegetarian/vegan. I'm happy if that's what you want to do, but don't be obnoxious about it.
And anyone who does it to be hip/make a political/social statement, fuck them. Complete losers.
#33
Posted 29 May 2012 - 01:00 AM
#35
Posted 29 May 2012 - 01:10 AM
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