So I've been doing my homework regarding the available topical agents and dietary supplements with some potential for hair growth. And guess what, almost no good news.
I have found out that some of the most recommended anti-inflammation compounds and free radical scavengers (=antioxidants) that should be blocking PGD2 also block PGE2. Here is the list:
Melatonin - readily available at all pharmacies. Micromolar or greater concentrations of melatonin decreased significantly the conversion of [3H]-arachidonic acid to prostaglandin (PG) F2 and thromboxane (Tx) B2, and inhibited slightly the conversion to PGE2 and PGD2.
http://www.ncbi.nlm.nih.gov/pubmed/1795220
Furthermore, melatonin counteracts the inhibitory effect of PGE2 on IL-2 production in human lymphocytes via its mt1 membrane receptor.
http://www.ncbi.nlm.nih.gov/pubmed/12594180
This is quite disappointing, especially as melatonin has been shown to grow hair of men in a specialized study.
Resveratrol potently reduces prostaglandin E2 production and free radical formation in lipopolysaccharide-activated primary rat microglia.
http://www.jneuroinflammation.com/content/4/1/25
Very unfortunate. Resveratrol is obtainable as a pure extract online and in some specialized shops.
Quercetin suppresses Cyclooxygenase-2 expression and angiogenesis through inactivation of P300 signaling. It significantly suppressed COX-2 mRNA and protein expression and PGE2 production, as well as COX-2 promoter activation in breast cancer cells. Quercetin also significantly inhibited COX-2-mediated angiogenesis in human endothelial cells in a dose-dependent manner.
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022934
Very disappointing. Quercetin is obtainable in some pharmacies and as a pure extract online.
Curcumin - inhibition of cell survival and induction of apoptosis by curcumin in colorectal adenocarcinoma cell lines is associated with the inhibition of PGE2 synthesis and down-regulation of COX-2.
http://www.ncbi.nlm.nih.gov/pubmed/16737669
Quite disappointing. Curcumin available as dieatary supplement, possibly also in large amounts somewhere.
Ascorbic acid (vitamin C) dose-dependently inhibited interleukin-1beta (IL-1beta)-mediated PGE2 synthesis in the human neuronal cell line. Furthermore it dose-dependentlyproduced a significant reduction in IL-1beta-mediated production of 8-iso-prostaglandin F2alpha (PGF2a), a reliable indicator of free radical formation, suggesting that the effects of ascorbic acid on COX-2-mediated PGE2 biosynthesis may be the result of the maintenance of the neuronal redox status since COX activity is known to be enhanced by oxidative stress.
http://arxiv.org/abs/0708.0548
This may not be as bad as it looks as the PGE2 synthesis in this particular case was mediated by IL1b and possibly by free radicals. It still is a small warning and a remainder for me to study this particular antioxidant some more. This because few other studies confirmed that L-ascorbic acid 2-phosphate or topical L-ascorbic acid should directly support hair growth:
http://www.ncbi.nlm.nih.gov/pubmed/20701628
http://www.jdsjournal.com/article/S0923-1811(05)00327-0/abstract
http://www.biomedcentral.com/1471-5945/4/13
Verdict - on hold. I am using it topically with MSM, I will know in 5 months. Available and overly expensive as a supplement in pharmacies but also very cheap in large amounts as a food additive.
Vitamin E (tocoferol, tocotrienol) - supplementation with vitamin E succinate resulted in a significant decrease in PGD2 levels, while PGF2alpha levels were significantly decreased. BL6-F10 cells supplemented with 7 and 10 microg/ml vitamin E succinate showed a marked increase in PGE2 levels with a significant increase occurring at 10 microg/ml. PGI2 levels followed a similar trend to PGE2 with a significant increase occurring at 10 microg/ml.
http://www.ncbi.nlm.nih.gov/pubmed/9223656
Verdict - cautious optimism. No real results related to hair loss/growth situation here. Available as supplement.
Vitamin D (calcitriol) - inhibiting COX-2 and stimulating 15-PGDH expression, calcitriol decreased the levels of biologically active prostaglandins in prostate cancer cells, thereby reducing the growth stimulation by prostaglandins. Calcitriol also inhibits the expression of the PG receptors EP2 and FP.
http://www.researchgate.net/profile...rostate_Cancer/links/00b4952b8b14f5d7f9000000
http://jn.nutrition.org/content/137/1/205S.full
http://www.ncbi.nlm.nih.gov/pubmed/16886660
Vitamin D available everywhere. And most possibly quite worthless for hairgrowth.
Green tea is also guilty, associated with a reduction in the levels of cyclooxygenase (COX)-2, prostaglandin (PG) E2 and PGE2 receptors (EP2 and EP4). Ingestion of green tea rapidly decreases prostaglandin E2 levels in rectal mucosa in humans.
http://www.ncbi.nlm.nih.gov/pubmed/10744131
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0025224
So how about that, hmm?
I believe that not everything is lost for these compounds. If you just want to stop you hairloss/shedding, you probably could use some kind of combination of a NSAID and some supplement of the above (particularly topical ascorbic acid should complement systemic NSAIDs nicely, perhaps along with topical calcitriol and melatonin). The results you will get from decreased COX-es could be visible on your hairloss/shedding within days, if not hours.
Hair growth is another chapter. Some of these compounds are downright unsuitable for any hair growth situation. I think we should look elsewhere [for hair growth].
I have found out that some of the most recommended anti-inflammation compounds and free radical scavengers (=antioxidants) that should be blocking PGD2 also block PGE2. Here is the list:
Melatonin - readily available at all pharmacies. Micromolar or greater concentrations of melatonin decreased significantly the conversion of [3H]-arachidonic acid to prostaglandin (PG) F2 and thromboxane (Tx) B2, and inhibited slightly the conversion to PGE2 and PGD2.
http://www.ncbi.nlm.nih.gov/pubmed/1795220
Furthermore, melatonin counteracts the inhibitory effect of PGE2 on IL-2 production in human lymphocytes via its mt1 membrane receptor.
http://www.ncbi.nlm.nih.gov/pubmed/12594180
This is quite disappointing, especially as melatonin has been shown to grow hair of men in a specialized study.
Resveratrol potently reduces prostaglandin E2 production and free radical formation in lipopolysaccharide-activated primary rat microglia.
http://www.jneuroinflammation.com/content/4/1/25
Very unfortunate. Resveratrol is obtainable as a pure extract online and in some specialized shops.
Quercetin suppresses Cyclooxygenase-2 expression and angiogenesis through inactivation of P300 signaling. It significantly suppressed COX-2 mRNA and protein expression and PGE2 production, as well as COX-2 promoter activation in breast cancer cells. Quercetin also significantly inhibited COX-2-mediated angiogenesis in human endothelial cells in a dose-dependent manner.
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022934
Very disappointing. Quercetin is obtainable in some pharmacies and as a pure extract online.
Curcumin - inhibition of cell survival and induction of apoptosis by curcumin in colorectal adenocarcinoma cell lines is associated with the inhibition of PGE2 synthesis and down-regulation of COX-2.
http://www.ncbi.nlm.nih.gov/pubmed/16737669
Quite disappointing. Curcumin available as dieatary supplement, possibly also in large amounts somewhere.
Ascorbic acid (vitamin C) dose-dependently inhibited interleukin-1beta (IL-1beta)-mediated PGE2 synthesis in the human neuronal cell line. Furthermore it dose-dependentlyproduced a significant reduction in IL-1beta-mediated production of 8-iso-prostaglandin F2alpha (PGF2a), a reliable indicator of free radical formation, suggesting that the effects of ascorbic acid on COX-2-mediated PGE2 biosynthesis may be the result of the maintenance of the neuronal redox status since COX activity is known to be enhanced by oxidative stress.
http://arxiv.org/abs/0708.0548
This may not be as bad as it looks as the PGE2 synthesis in this particular case was mediated by IL1b and possibly by free radicals. It still is a small warning and a remainder for me to study this particular antioxidant some more. This because few other studies confirmed that L-ascorbic acid 2-phosphate or topical L-ascorbic acid should directly support hair growth:
http://www.ncbi.nlm.nih.gov/pubmed/20701628
http://www.jdsjournal.com/article/S0923-1811(05)00327-0/abstract
http://www.biomedcentral.com/1471-5945/4/13
Verdict - on hold. I am using it topically with MSM, I will know in 5 months. Available and overly expensive as a supplement in pharmacies but also very cheap in large amounts as a food additive.
Vitamin E (tocoferol, tocotrienol) - supplementation with vitamin E succinate resulted in a significant decrease in PGD2 levels, while PGF2alpha levels were significantly decreased. BL6-F10 cells supplemented with 7 and 10 microg/ml vitamin E succinate showed a marked increase in PGE2 levels with a significant increase occurring at 10 microg/ml. PGI2 levels followed a similar trend to PGE2 with a significant increase occurring at 10 microg/ml.
http://www.ncbi.nlm.nih.gov/pubmed/9223656
Verdict - cautious optimism. No real results related to hair loss/growth situation here. Available as supplement.
Vitamin D (calcitriol) - inhibiting COX-2 and stimulating 15-PGDH expression, calcitriol decreased the levels of biologically active prostaglandins in prostate cancer cells, thereby reducing the growth stimulation by prostaglandins. Calcitriol also inhibits the expression of the PG receptors EP2 and FP.
http://www.researchgate.net/profile...rostate_Cancer/links/00b4952b8b14f5d7f9000000
http://jn.nutrition.org/content/137/1/205S.full
http://www.ncbi.nlm.nih.gov/pubmed/16886660
Vitamin D available everywhere. And most possibly quite worthless for hairgrowth.
Green tea is also guilty, associated with a reduction in the levels of cyclooxygenase (COX)-2, prostaglandin (PG) E2 and PGE2 receptors (EP2 and EP4). Ingestion of green tea rapidly decreases prostaglandin E2 levels in rectal mucosa in humans.
http://www.ncbi.nlm.nih.gov/pubmed/10744131
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0025224
So how about that, hmm?
I believe that not everything is lost for these compounds. If you just want to stop you hairloss/shedding, you probably could use some kind of combination of a NSAID and some supplement of the above (particularly topical ascorbic acid should complement systemic NSAIDs nicely, perhaps along with topical calcitriol and melatonin). The results you will get from decreased COX-es could be visible on your hairloss/shedding within days, if not hours.
Hair growth is another chapter. Some of these compounds are downright unsuitable for any hair growth situation. I think we should look elsewhere [for hair growth].
Last edited: