Random, interesting studies
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"PO [Peppermint oil ]significantly promoted bile and bile acid secretion in rats. It also increased bile acid efflux and decreased cholesterol levels (P < 0.01) in bile. In HepG2 cells the mRNA levels of CYP7A1 and FXR were significantly upregulated after treatment with PO."
https://onlinelibrary.wiley.com/doi/full/10.1111/j.1751-2980.2011.00513.x?utm_source=chatgpt.comMenthol + Menthone seem to have a dopaminergic effect
https://pubmed.ncbi.nlm.nih.gov/18718482-/
https://pubmed.ncbi.nlm.nih.gov/12686756/Menthol has some overlapping effects with progesterone as per this study
https://pubmed.ncbi.nlm.nih.gov/13819868/
It also acts as an anaesthetic like progesterone
https://pubmed.ncbi.nlm.nih.gov/11301871/Mode of action of peppermint oil and (-)-menthol with respect to 5-HT3 receptor
https://pubmed.ncbi.nlm.nih.gov/21077259/"...menthol acts as a noncompetitive antagonist of the 5-HT3 receptor..."
https://pubmed.ncbi.nlm.nih.gov/23965380/Menthol decreased milk production ,which hints at an anti prolactin effect and it inhibits mTOR.
https://pubmed.ncbi.nlm.nih.gov/33188562/Anti-leukemic effect of menthol, a peppermint compound, on induction of apoptosis and autophagy
https://pubmed.ncbi.nlm.nih.gov/36923503/I'd say given these studies, it's worth to try peppermint oil, which can consist of up to 80% menthol + Menthone.
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@Mauritio Menthol, Camphor, Menthone and Eucalyptus, all are terpenoids known for their "cooling" effect, and are completely saturated- Camphor and Eucalyptus are even saturated cages, similar to Adamantane. Very interesting to me.
I would love to see if their is some overlap in their origin, structure or effects -
@alfredoolivas yeah very interesting!
Look at the progesterone like effect of the studies I just edited in.
If they are indeed saturated molecules that makes an estrogenic effect even less likely .Btw trump just brought back menthol cigarettes , so that's good timing
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@Mauritio Peppermint oil is 30-50% menthol, 15-30% menthone and 5-10% eucalyptol. So peppermint oil could be a vehicle to deliver these substances.
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@alfredoolivas yes. I'm just not sure about potential estrogenic or anti DHT effects. But I haven't seen anything conving, that would stop me from consuming it infrequently .
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I purposefully stay away from peppermint.
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@DavidPS yeah that is the most convincing study i've seen so far the dosage also wasn't excessively high
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@Mauritio Well progesterone does the same; inhibits LH and FSH, and is therefore anti-androgenic. Unless peppermint oil is estrogenic, it may be a good proxy for progesterone.
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@alfredoolivas said in Random, interesting studies:
@Mauritio Well progesterone does the same; inhibits LH and FSH, and is therefore anti-androgenic. Unless peppermint oil is estrogenic, it may be a good proxy for progesterone.
Peppermint actually increased LH /FSH, unlike Progesterone.
I want to mention that the amount of menthol you get from tea is about ten times less than you get from the essential oil. and menthol seems to be the deciding metabolic factor here.
menthol actually has antiprolactin effects as i posted above so i'm not sure if anti - testosterone effects would be seen with the essential oil which is mostly Menthol.
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@DavidPS high amounts 40mg/kg peppermint caused white matter dmg vs 10mg/kg which didnt show it for this dmg , rats https://www.sciencedirect.com/science/article/abs/pii/0378427483901212
But the menthol has some liver toxicity at dopamine doses i think, shows liver protection caused by other things but can cause liver changes https://doi.org/10.1016/0378-4274(83)90120-0
when i tried menthol for the dopamine & temp effect i tried it through the skin , noticed some liver pain after a bit ~1g. which i never get otherwise
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@cs3000 - thanks for the additional information.
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@cs3000 thanks interesting . It seems save enough for a short duration or infrequent use.
I also noticed some dopaminergic benefits from nebulizing peppermint oil . I guess the dose there should be very low.The liver pain might also come from it decreasing peristalsis and thus bile not being excreted fast enough and reabsorbed...
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@Mauritio
It also worth noticing that peppermint is a κ-opioid receptor agonist...https://en.wikipedia.org/wiki/Κ-opioid_receptor#Natural_agonists
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@Kvirion said in Random, interesting studies:
@Mauritio
It also worth noticing that peppermint is a κ-opioid receptor agonist...https://en.wikipedia.org/wiki/Κ-opioid_receptor#Natural_agonists
Uh oh..." KOR activation causes a release in prolactin,[76]"
But then :
Menthol from Mentha piperita Suppresses the Milk Production of Lactating Mammary Epithelial Cells In Vivo and In Vitro
https://pubmed.ncbi.nlm.nih.gov/33188562/....
Doesn't add up . -
@Mauritio That might be how it inhibits LH and FSH, and is anti-androgenic, because the opioid receptor inhibits GnRH secretion when activated.
Steroids such as T and DHT, increase opioid receptor expression, which could be a mechanism of how they shut down the HPG axis.
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@Mauritio said in Random, interesting studies:
Doesn't add up .
Welcome to the real world of Complex Adaptive Systems
This means that reaction/influence/outcome is context-dependent. I.e. may be different for different sexes or certain conditions/circumstances...
BTW Before Peatiing, I was hypothyroid with IBS-D and pretty low T...
When I was using p-mint it definitely was slowing down my digestive system - in opioid-like ways.
Secondly, at first, I was feeling the influence of rising dopamine (MAO-B inhibition), but after an hour or two it always turned into an increase in prolactin and a decrease in testosterone, which unfortunately was painfully noticeable for at least half of a day or night... -
@alfredoolivas said in Random, interesting studies:
That might be how it inhibits LH and FSH, and is anti-androgenic, because the opioid receptor inhibits GnRH secretion when activated
Like I said above : the study showed that peoermint increased LH and FSH
@Kvirion said in Random, interesting studies:
but after an hour or two it always turned into an increase in prolactin and a decrease in testosterone, which unfortunately was painfully noticeable for at least half of a day or night...
Yeah too many people reports similar experience to yours, so I think it's best to stay away from it.
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@Mauritio said in Random, interesting studies:
Dates, olives and walnuts contain the highest amounts of the phytoprogestogen syringic acid.
Not only is syringic acid a phytoprogestogens, but it also had very potent pro thyroid effects in this study.
They gave rats a known anti- thyroid drug (PTU) to induce hypothyroidism.
Then they gave them syringic acid or T4.Syringic acid completely restored the T3 and T4 levels of hypothyroid rats.
It even increased them above baseline.T4 levels were even higher with syringic acid compared to giving them actual T4.
It also lowered TSH quite drastically .
@cs3000 they also included a control + synstingic acid group, and even in normal animals it helped their thyroid and increased T3 by about 30% .
Syringic acid had an affinity for the thyroid receptor TRb that was twice as strong as that of T3!
Syringic acid also increased antioxidants like SOD and catalase powerfully and lowered inflammatory cytokines.
These dosages they used are not achievable by diet alone though . Maybe there is a supplement. I also read something about pomegranate peels contain syringic acid.
https://pubmed.ncbi.nlm.nih.gov/34047416/