One thing that is often true with polyphenols, for the one that actually have any beneficial effects, is that they are only good in moderation. Notice how I mentioned it having a negative effect when consumed daily, net benefits were and are still present with occassional use.
Peat also made contradicting statements about Naringenin from Oranges, at times stressing the importance of its negative effects so go figure.
Peat about Naringenin :
But in another article, mentions :
Seems more like a case of forgetting about some of its estrogenic effects if the articles were written years apart, since he stressed it (and the importance of glucuronidation) several times, than advicing Naringenin with both pros and cons in mind. There are many phytoestrogens that have studies showing beneficial effects but he still strongly advices against them. That's one reason why I wouldn't do a diet high in Oranges but would rather consume them in small quantities.
For reference, glucuronidation is the detoxification of Estrogen into less active metabolites by the liver. Selfhacked has a page that adresses its factors :
Increasing Glucuronidation: Detox Bad Estrogens, Balance Hormones, Prevent Cancer - Selfhacked
(like everything on Selfhacked, research should be done before trying a supplement because there's often a lack of general context and of verification that these effects are present in physiological doses and not only in impossibly high ones)
Peat also made contradicting statements about Naringenin from Oranges, at times stressing the importance of its negative effects so go figure.
Peat about Naringenin :
For example, the flavonoids, naringenin, quercetin and kaempherol (kaempherol is an antioxidant, a phytoestrogen, and a mutagen) modify the metabolism of estradiol, causing increased bioavailability of both estrone and estradiol.
Similarly, several flavonoids (naringenin, hesperetin, kaempferol, quercetin, rutin, flavone, alpha-naphthoflavone and beta-naphthoflavone) also inhibited rat liver microsomal glucuronidation of estrone and estradiol to varying degrees.
But in another article, mentions :
“Orange juice contains the antiinflammatory chemicals naringin and naringenin, which protect against endotoxin by suppressing the formation of nitric oxide and prostaglandins (Shiratori, et al., 2005).”
“Substances that inhibit inflammation are likely to also inhibit excessive collagen synthesis, serotonin secretion, and the formation of estrogen. Besides aspirin, some effective substances are apigenin and naringenin, found in oranges and guavas.
Seems more like a case of forgetting about some of its estrogenic effects if the articles were written years apart, since he stressed it (and the importance of glucuronidation) several times, than advicing Naringenin with both pros and cons in mind. There are many phytoestrogens that have studies showing beneficial effects but he still strongly advices against them. That's one reason why I wouldn't do a diet high in Oranges but would rather consume them in small quantities.
For reference, glucuronidation is the detoxification of Estrogen into less active metabolites by the liver. Selfhacked has a page that adresses its factors :
Increasing Glucuronidation: Detox Bad Estrogens, Balance Hormones, Prevent Cancer - Selfhacked
(like everything on Selfhacked, research should be done before trying a supplement because there's often a lack of general context and of verification that these effects are present in physiological doses and not only in impossibly high ones)