Soy protein exerts minor effects on reproductive hormones in young men (2005)
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Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#2Human body is complicated - when we think we know something today, it's not uncommon that eventually the evidence will come out proving us wrong. Doctors used to recommend smoking to people for stress release, all based on solid scientific evidence that was available at that time.
So whenever people make a dramatic switch to soy-based diet from a carnivore diet that we evolved with over millions of years, it's always important to acknowledge a possibility of side effects that we don't currently know about.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#3study conducted in 2005; n=35; p-values vary based on measurements; study conclusion is "[...] soy protein, regardless of isoflavone content, decreased DHT and DHT/testosterone with minor effects on other hormones, providing evidence for some effects of soy protein on hormones."; further study on larger/more diverse populations required.
Read study entirely and in context before judging effect size based on study alone but the data indicates further study is worth pursuing.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#4So the soy boy meme is now backed by a scientific study.
EDIT: I didn’t realize the study was from 2005. In that case the research predates the meme.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#5This was published in 2005, and the title of the submission should be dated appropriately.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#6study conducted in 2005; n=35; p-values vary based on measurements; study conclusion is "[...] soy protein, regardless of isoflavone content, decreased DHT and DHT/testosterone with minor effects on other hormones, providing evidence for some effects of soy protein on hormones."; further study on larger/more diverse populations required. Read study entirely and in context before judging effect size based on study alo…
That's big if true - people usually suggest the isoflavones are to blame, rather than the protein itself.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#7DHT causes hair loss, perhaps you can hope to keep your hair longer with Soy protein
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#8study conducted in 2005; n=35; p-values vary based on measurements; study conclusion is "[...] soy protein, regardless of isoflavone content, decreased DHT and DHT/testosterone with minor effects on other hormones, providing evidence for some effects of soy protein on hormones."; further study on larger/more diverse populations required. Read study entirely and in context before judging effect size based on study alo…
I've noticed that's rather common with NIH studies. Small sample sizes and large conclusions.
Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#9study conducted in 2005; n=35; p-values vary based on measurements; study conclusion is "[...] soy protein, regardless of isoflavone content, decreased DHT and DHT/testosterone with minor effects on other hormones, providing evidence for some effects of soy protein on hormones."; further study on larger/more diverse populations required. Read study entirely and in context before judging effect size based on study alo…
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Re: Soy protein exerts minor effects on reproductive hormones in young men (2005)
#10On one hand: YAY SCIENCE AND DATA!
On the other hand: Ahhhh, figs.
The sample size is incredibly small (n=35), but it appears to be a well-constructed & controlled study. This merits further investigation. And that's exactly what the abstract ends with.
My husband and I switched to soy milk about 15 years ago. Anecdote, he had his testosterone tested recently and it was fairly high [he's completely bald], I have not had mine tested ever. We like soy milk because we get the raw stuff without the gross thickeners like xantham gum or carageenan, everything else seems to add that (oat, rice, hemp, almond, etc.).
But data is data.
Hopefully this isn't one of those "un-reproducable studies" but it was done by the NIH and not a university.