If you have rosacea....avoid Arachidonic Acid
This is something that I've been discussing with a dermatologist(not personal, just a friend that I have) off and on for the past 3 weeks. Folks with rosacea tend to be extremely sensitive to excess carbohydrates, especially simple sugars, which can lead to out-of-control episodes of flushing. This mechanism, as a lot of other things related to rosacea, is not entirely understood, but it has become clear that a portion of the problem relating to rosacea is that in response to insulin release, the body produces Phospholipase A2, which stimulates arachidonic acid release. This is a study I came across that I believe can be relevant to rosacea sufferers, both as a diet advisory and a warning on use of supplements in general for those with this condition.
[QUOTE] Song K, Zhang X, Zhao C, Ang NT, Ma ZA.
Division of Experimental Diabetes and Aging, Department of Geriatrics and Adult Development, Mount Sinai School of Medicine, New York, New York 10029, USA.
Islet Ca2+-independent phospholipase A2 (iPLA2) is postulated to mediate insulin secretion by releasing arachidonic acid in response to insulin secretagogues. However, the significance of iPLA2 signaling in insulin secretion in vivo remains unexplored. Here we investigated the physiological role of iPLA2 in beta-cell lines, isolated islets, and mice. We showed that small interfering RNA-specific silencing of iPLA2 expression in INS-1 cells significantly reduced insulin-secretory responses of INS-1 cells to glucose. Immunohistochemical analysis revealed that mouse islet cells expressed significantly higher levels of iPLA2 than pancreatic exocrine acinar cells. Bromoenol lactone (BEL), a selective inhibitor of iPLA2, inhibited glucose-stimulated insulin secretion from isolated mouse islets; this inhibition was overcome by exogenous arachidonic acid. We also showed that iv BEL administration to mice resulted in sustained hyperglycemia and reduced insulin levels during glucose tolerance tests. Clamp experiments demonstrated that the impaired glucose tolerance was due to insufficient insulin secretion rather than decreased insulin sensitivity. Short-term administration of BEL to mice had no effect on fasting glucose levels and caused no apparent pathological changes of islets in pancreas sections. These results unambiguously demonstrate that iPLA2 signaling plays an important role in glucose-stimulated insulin secretion under physiological conditions.
PMID: 15471944 [PubMed - indexed for MEDLINE] [/QUOTE]
Since rosacea is considered an inflammatory disease, I would advise all folks who have been diagnosed with this, to avoid any sort of inflammatory compounds as well. I myself was diagnosed with rosacea back when I was 16, and it is something that I managed to get under control thanks to manipulating my diet and lifestyle to overcome the condition. One thing I noticed recently while using an arachidonic acid product is that I had a large increase in facial redness, which had been nonexistent for several years prior to my use of this product. I only really noticed it because as soon as I went back on high-dose fish oil and cut out the product, the redness began to clear up almost on cue.
My rosacea is well under control, but I would advise anyone else suffering from this condition to consult with their dermatologist before using ANY supplements other than plain protein supps and fish oil, which has been proven to be ultra-beneficial in the case of rosacea. You should also avoid any vasodilators such as arginine, to the maximum extent possible, as they will only worsen your condition over time.
Some more info.
[QUOTE] Inflammation in skin is mediated by several active chemicals and metabolites of arachidonic acid. Arachidonic acid is oxidized by cyclo-oxygenase and lipoxygenase to active metabolites such as the leukotrienes and 5- and 12-hydroxyeicosatetraenoic acid (HETES). Within the arachidonic acid cascade, many free radicals are generated, which both perpetuate and magnify the inflammatory cascade, resulting in skin damage and manifested clinically as erythema. The redox state of the cell determines gene expression. Transcription factor nuclear factor kappa-B (NFκ-B) is inactive in the cytosol under a normal redox state of the cell. When the cell undergoes oxidative stress, i.e., ultraviolet radiation, ionizing radiation, infection, and free radicals created by metabolism, the inhibitory fraction of NFκ-B is dissociated from the molecule. Once the inhibitory fraction is dissociated from the NFκB molecule, it then migrates to the nucleus of the cell, begins transcription, and subsequent production of inflammatory mediators, including cytokines such as tumor necrosis factor alpha (TFα) and various interleukins, as well as many of the pro-inflammatory interleukins. These pro-inflammatory and inflammatory products of transcription then enter the cell cytoplasm effecting all parts of the cell including the mitochondria and cell membrane. Arachidonic acid is released, which is oxidized to biologically active mediators. When arachidonic acid is oxidized via the cyclooxygenase or lipoxygenase pathways, for example, prostaglandins, leukotrines, and hydroxyeicosatetraenoic acid (HETE) are produced, which cause erythema, edema, and free radical production. Lipoic acid is a powerful inhibitor of the activation of NFκ-B, and therefore can act as an anti-inflammatory as well as an antioxidant. It would be useful to employ this substance in the treatment of chronic skin conditions such as rosacea. [/QUOTE]
To combat inflammation, green tea extract, K-R-ALA, Vitamin C and borage oil are also great compounds to use. As mentioned before, if suffering from rosacea, you should absolutely minimize the use of foods that promote heavy insulin release, as this only leads to further systemic inflammation. The ideal diet for rosaceans is one that is heavy in vegetables, fish, lean meats and minimizes simple sugars in all their forms.
14 million+ Americans suffer from rosacea, and the vast majority don't realize it. If you experience persistent facial redness, burning eyes, skin flareups due to heat/alcohol/spicy foods...etc........it is not something you should ignore, but rather get a checkup with a dermatologist. When treated early, rosacea is very simple to control, but if you wait, there is irreversible damage that can occur to your skin, the most notorius being the "Orson Welles nose.
[url]www.rosacea.org[/url]
Once again, [b] I am not bashing arachidonic acid or any products that contain it. I used one that I was very happy with, as my gains were terrific, and I recommend it to any healthy person, as it is perhaps the most efficient compound for natural athletes to gain muscle with, however, I do urge caution to those with inflammatory disorders such as rosacea and various digestive issues that I believe would be worsened through the supplementation of arachidonic acid. [/b]
-EM