So this is basically a post where I’m asking for some scientific evidence that refutes this potential myth. Is their a high quality research out there for this particular topic, also does a high amount(~150g) distributed throughout the day seems like a good choice as it’s very cheap and is an abundant source of protein?
I don’t know if this qualifies as rigorous in your book, but it seemed sound enough to me.
From my searching into this topic, I have found it is not really a concern. I think this is just one of those cases, now, that people hear “phytoestrogen” and only actually listen to “estrogen” and think the biological mechanisms work the same way. I thought that way for a while until I started reading up on the topic.
Loads of research:
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Soya contains phytoesteogens. These are compounds that mimick estrogen only as far as displacing estrogen from its receptors in cells. Meaning, the body attempting to use estrogen cannot since the substance isn’t estrogen, but has displaced the estrogen - rendering estrogen unutilized. Hence, the effects of estrogen don’t occur.
LMAO it’s the difference with phytoestrogen that affects PLANTS and mammal estrogen that DOES actually affect you, which is why the estrogen in burgers and dairy can give men pronounced mammary fatty tissue. It’s psychotic for people to say soy makes feminine lmfaooo
Search terms “impact soy intake testosterone levels pubmed review”
https://pubmed.ncbi.nlm.nih.gov/19524224/
AbstractObjective: To determine whether isoflavones exert estrogen-like effects in men by lowering bioavailable T through evaluation of the effects of soy protein or isoflavone intake on T, sex hormone-binding globulin (SHBG), free T, and free androgen index (FAI) in men.Design: PubMed and CAB Abstracts databases were searched through July 1, 2008, with use of controlled vocabulary specific to the databases, such as soy, isoflavones, genistein, phytoestrogens, red clover, androgen, testosterone, and SHBG. Peer-reviewed studies published in English were selected if [1] adult men consumed soy foods, isolated soy protein, or isoflavone extracts (from soy or red clover) and [2] circulating T, SHBG, free T, or calculated FAI was assessed. Data were extracted by two independent reviewers. Isoflavone exposure was abstracted directly from studies.Main outcome measure(s): Fifteen placebo-controlled treatment groups with baseline and ending measures were analyzed. In addition, 32 reports involving 36 treatment groups were assessed in simpler models to ascertain the results.Result(s): No significant effects of soy protein or isoflavone intake on T, SHBG, free T, or FAI were detected regardless of statistical model.Conclusion(s): The results of this meta-analysis suggest that neither soy foods nor isoflavone supplements alter measures of bioavailable T concentrations in men.
Hbomberguy - SOY BOYS A MEASURED RESPONSE.
You already got your answers but i just want to share this cool informative video about soy and its “feminization” and about rightwing media histeria.
From Examine.com, which is basically a research aggregator:
>In men, regular intake of soy protein may reduce the risk of developing prostate cancer. Soy protein also has the potential to reduce testosterone levels and interfere with fertility, but only when consumed in excess — no such effects have been observed from the daily consumption of 10–70 grams of soy protein or 60–240 mg of isoflavoneshttps://examine.com/nutrition/is-soy-good-or-bad/
In moderation there’s no harm, but there has been some adverse effects linked to high consumption for a long period (6+ months). The studies also show Asian people tend to process higher levels of soy better, potentially a genetic difference from centuries of it being common in their diet, sort of the opposite of their issues with dairy/lactose.
I can tell you from personal experience as a lady, phytoestrogens can absolutely make changes in your body.
I once went through a phase where I had a high protein cereal made with soy protein every day for a month or so. My boobs got swollen and tender, and I felt ‘puffy’. Went to my doctor, she confirmed the phytoestrogens could cause this.
I stopped eating the soy protein cereal, and after a week or so, it was back to normal.
I read over in r/crohnsdisease that it absorbs pesticides and repeatedly tests positive for pesticide residue so it should be avoided. Don’t know how true that is though. I typed soy high in pesticide on Google and there are articles about it.
Watch Brian turners video on soy, dude ate a pound of soy a day for a month blood testosterone was HIGHER at the end of the month. I’ve yet to see research proving soy has any effect on men’s testosterone levels, people hear phytoestrogens and assume that’s the same as estrogen. But don’t ask us on Reddit search soy estrogen on pubmed and lots of studies will tell you the same, no noticeable effect
phytoestrogens are not 17-alfa akyl, so they are not bioavailable orally. they resemble the structure of 17-beta-estradiol, which are not orally bioavailable.if you ate actual bioidentical 17-beta-estradiol, you wouldn’t get gynecomastia, cause the body would digest the molecule instead of using it as is.estradiol is widely used in many health treatments and if it was available in soy, it would be used for treatment in a concentrate format of some sort, which is not, to the luck of a few and detriment of others.
Yes it does reduce androgen receptors in men prone to prostate cancer, and probably in all men. https://www.researchgate.net/publication/6252406_Isoflavone-Rich_Soy_Protein_Isolate_Suppresses_Androgen_Receptor_Expression_without_Altering_Estrogen_Receptor-b_Expression_or_Serum_Hormonal_Profiles_in_Men_at_High_Risk_of_Prostate_Cancer
If the number of androgen receptors is reduced, then it doesn’t matter how much testosterone one has, feminization will occur anyway.
Don’t believe many of the studies out there because the Soy Nutrition Institute is paying for at least some of them.
I was told to avoid soy while trying to conceive. Idk about the science, I just did it, lol.
Something about it messing up hormone levels. I assume if it is so for women, it likely is for men as well.
The answer, apparently, is “it depends” : https://pubmed.ncbi.nlm.nih.gov/32824177/
https://pubmed.ncbi.nlm.nih.gov/12747219/
Low amounts of soy( non gmo soy) is actually beneficial for hormone balance.
Moderate-large quantities of it are not. As with most things the internet just latched onto this crazy notion of soy being some sort of HRT