Will Brink, Brinkzone
Flax Oil and Estrogenic Compounds: Should Men Avoid Flax Oil?
For many years I have actually continued reading numerous ‘net forums and other places, that flax oil contains estrogenic compounds and men should avoid flax oil. It’s frequently written as truth. Is it real? Let’s see…Will consuming flax cause moobs?!
For one, it’s really a moot problem if you are speaking about flax oil. The primary flaxseed lignan is secoisolariciresinol diglucoside (SDG), which is found in the hull, however which occurs in the oil in extremely little amounts. I don’t usually suggest big quantities of ground flax seed to males per se, however it’s also an even more complex problem than individuals – in specific self declared specialists discovered on the ‘internet – understand, and no basic flax lignan = estrogenic effects should be made.
The term “phyto estrogen” is not automatically an unfavorable per se, as it might serve as an anti estrogen depending upon the tissue in question and other variables.
For instance, flax lignans were discovered to minimize mammary carcinogenesis, which implies it’s serving as an anti estrogen in those tissues. According to one evaluation on the subject:
“…phytoestrogens, like certain selective estrogen receptor modulators, have an antiproliferative effect on the breast, and positive effects on the lipoprotein profile and bone density. They might also improve some of the climacteric symptoms.” (1)
The bottom line here is, it is WAY more complex than you believe. Should guys go out and consume big quantities of ground flax seed in hopes of getting an anti estrogenic result?
No, as big quantities of weak estrogens in the male system can still have a net unfavorable result depending upon lots of physiological variables, however the impacts, dosage required, etc, etc are far from clear at this time.
Should guys stress over the small quantities of lignans discovered in flax oil? No. As pointed out in other locations and posts, I have actually understood and or trained some high level guys consuming to 7tbl spoons each day of flax oil, without any unfavorable influence on them that I could see, and one pointed out a decrease in gyno, which he credited to the addition of the flax oil, however naturally that’s an n =1 observation and not unbiased science by any means.
Research studies in animals, once again, suggest intriguing impacts on hormone levels, at least in animals provided with big quantities of flax seeds. (2). A research study called “Dose, timing, and duration of flax seed exposure affect reproductive indices and sex hormone levels in rats” done at the Department of Nutritional Sciences, University of Toronto, Ontario, Canada discovered:
“In male rats, lifetime 10% flaxseed exposure raised serum testosterone and estradiol levels and produced higher relative sex organ weights and prostate cell proliferation. In contrast, lifetime exposure to 5% flaxseed reduced adult relative prostate weight and cell proliferation, suggesting potential protection against prostatic disease, although sex hormone levels were unaffected. In conclusion, flaxseed can potentially alter reproduction, depending on the dose and timing of exposure.”
So, at really high quantities for their whole life span, flax seeds increased both testosterone and estradiol and even at 5% of their diet plans for their whole life, no impacts on hormones were discovered. Conclusion, individuals advising guys stay away from flax oil “because it contains estrogens” don’t have an idea what they are speaking about…
(1) Brzezinski A & Debi A, Eur J Obstet Gynecol Reprod Biol, 85(1): 47, 1999)
(2) Tou JC, Chen J, Thompson LU.J Toxicol Environ Health A. 1999 Apr 23;56(Cool: 555-70.Will Edge