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Which of the dirty dozen of supplements and foodstuffs in todays SuppVersity review can really help you to make sure, youre not the one out of those nine men who develops prostate cancer?

Supplements that are supposed to protect you from developing prostate cancer and/or agents that may help patients with existing prostate issues are - obviously - in high demand. And as W. Merkle points out in a recent article in the German science journal Urologe using them - even if they may not be as effective as some patients may believe - makes sense: from a psychological perspective, alone (Merkle. 2014).

Taking a pill with selenium, for example, has been shown to alleviate some of the side effects of chemotherapy. General protective effects against prostate cancer, on the other hand, have not been established. In fact, the most recent studies rather suggest that "supplementation did not benefit men with low selenium status but increased the risk of high-grade PCa among men with high selenium status" (Kristal. 2014).
Luckily, there are other supplements with more promising data. Supplements that will actually complement, a healthy diet and active lifestyle, the two pillars of all (not just prostate) cancer protection. Supplements like...

• Curcumin - As a SuppVersity reader youve probably already expected to see the curcumin on the list. Its potent anti-inflammatory effects and more specifically its ability to target multiple inflammatory pathways, which include NF-KappaB, COX2, STAT3 and high levels of CRP, Prostaglandins and TNF-alpha make it a particularly valuable anti-tumor agent of which Guo et al. observed in a recent study that it will induce cell cycle arrest and apoptosis of prostate cancer cells by regulation the expression of IkappaBalpha, c-Jun and androgen receptor (Guo. 2013)
• Genistein - Just like curcumin, genistein acts on NF-KappaB (Adjakly. 2013). In addition it will upregulate a protein called miR-574- 3p that will have cancer cells "kill themselves" (go into apopotosis; Chiyomaru. 2013). In addition scientists have found genistein to support the efficiacy of Cabazitaxel which is used for the treatment of hormone-refractory prostate cancer.
• Pomegranate - Pomegranate extracts or rather its ingredients, i.e. ellagic acid, caffeic acid, luteolin and punicic acic, have been shown to inhibit the proliferation and induce apoptosis in prostate cancer cells (NCI. 2013).

  Figure 1: If you look at the actual increase in apoptotic cancer cells in response to the pomegranate treatment, it is obvious that some patients (e.g. #53) benefited more than others (Pantuck et al. 2006)

  A clinical trial by Pantuck et al. (2006) was also able to show that the time it takes for the PSA levels, an albeit debatable marker of prostate cancer risk, to double decreased significantly, when the subjects, men with rising PSA after surgery or radiotherapy, were treated with 8 ounces of pomegranate juice daily (Wonderful variety, 570 mg total polyphenol gallic acid equivalents) until disease progression. Unfortunately, a more recent study by Stenner-Liewen et al. (2013) could not confirm these effects. 
• Brassica vegetables (cruciferous vegetables) - While general vegetable intake is already associated with a -39% reduced risk of developing extraprostatic prostate cancer (cancer, eating tons of cruciferous vegetable, it was the intake of broccoli and cauliflower that made the biggest impact in a 2007 study by Kirsh et al.
  
  

  Even if they dont protect you from prostate cancer broccoli & co will inhibit myostatin and could help you to grow more muscle... well, at least theoretically, you know about the difference between the petri dish and the real world, so dont expect monster gains | more.

  As it is usually the case the evidence is yet ambiguous. In a 2002 review of the evidence, Kristal, et al. found that of the six studies they could clearly interpret, only three reported statistically significant reduced risks (P < 0.05), while one reported a borderline significant reduced risk (P = 0.06). Against that background Verhoeven et al. are right, when they say: " Further epidemiological research should separate the anticarcinogenic effect of brassica vegetables from the effect of vegetables in general" (Verhoeven. 1996).
  
  More recently, Joseph et al. found that the existing differences in the epidemiological data may be due to genetic polymorphisms due to which only men with a certain genetic polymorphisms in glutathione S-transferases M1 and T1 will benefit from eating tons of cruciferous veggies (Joseph. 2004).
• Green tea - Green tea is good for everything, right? Well unless its not loaded with toxic molecules (see previous SuppVersity article) this may in fact be right. Convincing evidence from human trials is albeit scarce. What we do have are rodent studies like the ones that were conducted with TRAMP mice, which model closely mirrors the pathogenesis of human prostate cancer.
  
  In these mice EGCG, one of the main catechins in green tea, decreased the proliferation of prostate cancer cells and reduced the PSA levels. Scientists believe that these effects are mainly mediated by the effects EGCG has on the growth promoting proteins ERK1/2. Unfortunately, the same rodent studies also suggest that it is probably too late for many of you to start drinking green tea, now, because said beneficial effects are only observed in young, not in old TRAMP mice (Donald. 2012).

• Coffee is for the ladies, too! Studies show significantly reduced risks of breast cancer with 5+ cups of coffee. Tee and cacao help, as well | more

  Coffee - Obviously I am biased, when it comes to coffee. I still hope you believe me when I say that drinking 5+ cups of coffee per day has been associated with significantly reduced risk of prostate cancer in what is probably the most large-scale meta-analysis of the topic today.
  
  In their meta-analsis of 12 peer-reviewed case-control studies, Lu et al. calculated a 4% risk reduction for Europeans who consumed five or more cups of coffee and Americans who consumed 4 or more regular cups of coffee (equ. to approximately 400-500mg of caffeine). Moreover, the scientist found "a significant inverse association in all categories of prostate cancer except Gleason <7 grade" in both the "fixed-effects model" and the "random-effects model" (Lu. 2014).
  
  Wilson et al. also report an inverse association between coffee consumption and the incidence of highly malignant prostate cancer (Wilson. 2013). This means that drinking coffee is not only going to reduce your overall risk of developing prostate and other cancers (Geybels. 2013), it will also increase your chance that in the unfortunate case you still develop cancer, its going to be a benign and treatable form of prostate cancer.
• Lignans (e.g. from flaxseed) - While many of you will probably know them as "bad anti-androgens", there is little doubt that lignans from flax and other foodstuff inhibit cancer growth. What is particularly interesting about these agents is that they dont work via the "regular" NF-kappaB pathway but inhibit the expression of the vascular endothelial growth favtor (VEGF; cf. Azrad. 2013).
• Lycopene - Its the bright red carotene and carotenoid pigment and phytochemical that gives tomatoes and other red fruits and vegetables, such as red carrots, watermelons, gac, and papayas, although not in strawberries, red bell peppers, or cherries their color.
  
  Based on the currently available evidence it appears to help not just with prostate, but also with pancreatic, intestinal and lung cancer (Giovannucci. 1999). In that, it makes a particularly effective adjunct to classic cancer therapy (Tang. 2011).

  Figure 2: Prostate cancer risk w/ high vs. low intakes of the given antioxidants according to XRCC1 genotype (Goodman. 2006)

  Unfortunately, the data is ambigious... as usual. Unlike for other agents, it does yet appear as if scientists have already identified a certain gene, i.e. XRCC1, which appears to determine whether you do or do not benefit from the consumption of increased amounts of tomato lycopene (Goodman. 2006).
  
  In view of the fact that certain genotypes actually increase their prostate cancer risk specifically if they are consuming both, a high amount of lycopene and vitamin E (alpha-tocopherol), the latest Cochrane Review on the protective effects of lycopene against prostate cancer considers the evidence for "preliminary" and "insufficient" (Ilic. 2011).
• Fish oil / omega-3 - In spite of the fact that the media jumped at the finding of the SELECT trial (learn more) that claimed that selenium would be bad, while a high fish consumption or rather a high amount of omega-3s in the blood would protect you against prostate cancer, a close re-analysis of the data you can read up on at the website of the Life Extension Foundation indicates that this was all media hype.
  
  With a de facto difference of only 0.18% the difference was... well, youd say a joke, scientists would say "within the margin of statistical error" and thus by no means significant. If you take an even closer look at the data, it would even seem as if omega-3 fatty acids would increase the risk of prostate cancer.
• Resveratrol - If you look at the existing evidence you will be surprised to find studies that indicate that resveratrol increases (Klink. 2013) and studies that show that it inhibits prostate cancer growth (Iguchi. 2012; Kai. 2011).
  
  Again, it took a closer look at the data and another experiment to find out what really was going on: a dose-dependent effect with increased risk with low and decreased risk with high doses of resveratrol (Benitez. 2007). Bad news: With the current low biovailable oral resveratrol preparations youre likely to end up in the "increased risk" resveratrol exposure zone.
• Selenium - While I have mentioned it in the introduction already, its certainly worth taking a closer look at what selenium is actually supposed to do.
  
  In their 2011 review of the literature, Rizky Abdulah et al. didnt just highlight the many different molecular pathways, by which selenium could protect you from developing cancer, they also point out that the type of selenium supplement used could be of critical importance with respect to the success of your efforts to avoid the development of cancer. In that,...

  In rodents selenium acts as corrosion inhibitor in the brain | learn more

  "[...] methylselenol is believed to be the critical metabolite in selenium chemoprevention. Since methylselenol is highly reactive, methylselenol precursors such as Semet and Se-mSC are important both in in vitro and in vivo experiments. Semet and Se-mSC conversion to methylselenol, however, requires enzymatic conversion by the enzyme ?-lyase, which is 800 times less prevalent in human tissues than in mouse tissues.

  This may explain why the results of Semet and Se-mSC anticancer studies in humans were not as impressive as in vivo experiments. Although researchers have now turned to other Se compounds such as mSeA, which do not need enzymatic conversion to methylselenol, or selenite, which does not need to be converted to methylselenol for its anticancer properties, more substantial research on selenium compound metabolism in human tissues is necessary." (Abdulah. 2011)

  In other words, as of now, we dont know which form of selenium we actually have to use in human trials to generate similar impressive results as they have been observed in rodents.
  
  And as if that wasnt already "bad" enough, a meta-analysis of intervention studies by Hurst et al. (2012) indicates that there is a very narrow "band" of serum concentrations, where selenium is actually good for you! When your selenium level passes 170 ng/ml the tumor-protective effect disappears and - worst case scenario - your risk increases. So remember: More does certainly not help more!
• Silibin (from milk thistle) - You probably think of milk thistle as a "liver supplement". In fact, its main active constituent will yet also reduce the efficacy of osteoclast cytokines and reduce the concentration of RANKL-ligands. Thus it will regulate the NF-?B und AP1 levels in cells and inhibit the proliferation, invasion and migration of metastatic prostate cancer (Ting. 2011; Chen. 2012) 
• Vitamin D - Believe it or not: There are things vitamin D3 cannot do! One of this things is to protect you prostate cancer. Thats the prerogative of active vitamin D aka calciferol. In rodent studies and studies on human cell lines calciferol and multiple analogs of active vitamin D have shown to be promising drugs for prostate cancer protection, though (Tokar. 2005).
  
  

  Underestimated Vitamin D Sources: Eggs, Chicken, Pork, Fish & Dairy Contain Ready-Made 25OHD | more

  Since simply popping tons of vitamin D3 is (luckily) without effect on the levels of calciferol (otherwise you would run the risk of being calcified from the currently prevalent abuse of vitamin D3 supplements), using vitamin D3 is less effective, but not useless.
  
  In 2010, for example, Woo et al. observed that the time it took for the PSA levels of prostate cancer patients to double was significantly reduced, when the subjects received 2,000 IU of vitamin D3 per day (Woo. 2005) - an effect of which previous in vitro studies suggest that it could be due to the local conversion of D3 to active vitamin D in prostate cancer cells (Tokar. 2005).
• Vitamin E - Needless to say that vitamin E has gotten a bad rep ever since scientists observed an increased risk when they gave the subjects of the SELECT trial vitamin E (learn more). Still, as long as you stay away from "classic" vitamin E and buy one of the still expensive tocotrienol supplements (or eat red palm oil), you can expect an anti-proliferative effect of the vitamins E (Conte. 2004; Srivastava. 2006)

References:

• Abdulah, Rizky, et al. "Molecular targets of selenium in prostate cancer prevention (Review)." International journal of oncology 39.2 (2011): 301-309. 
• Andersson, Swen-Olof, et al. "Lifestyle factors and prostate cancer risk: a case-control study in Sweden." Cancer Epidemiology Biomarkers & Prevention 5.7 (1996): 509-513.
• Azrad, Maria, et al. "Flaxseed-derived enterolactone is inversely associated with tumor cell proliferation in men with localized prostate cancer." Journal of medicinal food 16.4 (2013): 357-360.
• Benitez, Dixan A., et al. "Mechanisms Involved in Resveratrol?Induced Apoptosis and Cell Cycle Arrest in Prostate Cancer—Derived Cell Lines." Journal of andrology 28.2 (2007): 282-293. 
• Chen, Rongxin, et al. "The significance of MMP-9 over MMP-2 in HCC invasiveness and recurrence of hepatocellular carcinoma after curative resection." Annals of surgical oncology 19.3 (2012): 375-384.
• Chiyomaru, Takeshi, et al. "Genistein up-regulates tumor suppressor microRNA-574-3p in prostate cancer." PloS one 8.3 (2013): e58929. 
• Conte, Carmela, et al. "??Tocotrienol Metabolism and Antiproliferative Effect in Prostate Cancer Cells." Annals of the New York Academy of Sciences 1031.1 (2004): 391-394.
• Donald, J. L. "Plasma metabolic profiling reveals age-dependency of systemic effects of green tea polyphenols in mice with and without prostate cancer." Molecular BioSystems 6.10 (2010): 1911-1916.
• Geybels, Milan S., et al. "Coffee and tea consumption in relation to prostate cancer prognosis." Cancer Causes & Control 24.11 (2013): 1947-1954. 
• Giovannucci, Edward. "Tomatoes, tomato-based products, lycopene, and cancer: review of the epidemiologic literature." Journal of the National Cancer Institute 91.4 (1999): 317-331.
• Guo H, Xu YM, Ye ZQ, Yu JH, Hu XY. "Curcumin induces cell cycle arrest and apoptosis of prostate cancer cells by regulating the expression of IkappaBalpha, c-Jun and androgen receptor." Pharmazie 68.6 (2013):431-4.
• Hurst, Rachel, et al. "Selenium and prostate cancer: systematic review and meta-analysis." The American journal of clinical nutrition 96.1 (2012): 111-122.
• Iguchi, Kazuhiro, et al. "Antiandrogenic activity of resveratrol analogs in prostate cancer LNCaP cells." Journal of andrology 33.6 (2012): 1208-1215. 
• Joseph, Michael A., et al. "Cruciferous vegetables, genetic polymorphisms in glutathione S-transferases M1 and T1, and prostate cancer risk." Nutrition and cancer 50.2 (2004): 206-213.
• Kai, Li, and Anait S. Levenson. "Combination of resveratrol and antiandrogen flutamide has synergistic effect on androgen receptor inhibition in prostate cancer cells." Anticancer research 31.10 (2011): 3323-3330.
• Kirsh, Victoria A., et al. "Prospective study of fruit and vegetable intake and risk of prostate cancer." Journal of the National Cancer Institute 99.15 (2007): 1200-1209.
• Klink, Joseph C., et al. "Resveratrol worsens survival in SCID mice with prostate cancer xenografts in a cell?line specific manner, through paradoxical effects on oncogenic pathways." The Prostate 73.7 (2013): 754-762.
• Kristal, Alan R., et al. "Baseline selenium status and effects of selenium and vitamin E supplementation on prostate cancer risk." Journal of the National Cancer Institute 106.3 (2014): djt456.
• Lu, Yu, et al. "Coffee consumption and prostate cancer risk: an updated meta-analysis." Cancer Causes & Control 25.5 (2014): 591-604. 
• Merkle, W. "Prostatakarzinomprophylaxe durch Nahrungsergänzungsmittel." Der Urologe (2014): 1-7.
• NCI (2013) Pomegranate: prostate cancer, nutrition and dietary supplements (PDQ). NCI, Bethesda. http://www.cancer.gov
• Ornish, Dean, et al. "Intensive lifestyle changes may affect the progression of prostate cancer." The Journal of urology 174.3 (2005): 1065-1070.
• Pantuck, Allan J., et al. "Phase II study of pomegranate juice for men with rising prostate-specific antigen following surgery or radiation for prostate cancer." Clinical Cancer Research 12.13 (2006): 4018-4026.
• Putnam, Shannon D., et al. "Lifestyle and anthropometric risk factors for prostate cancer in a cohort of Iowa men." Annals of epidemiology 10.6 (2000): 361-369.
• Stenner-Liewen, Frank, et al. "Daily Pomegranate Intake Has No Impact on PSA Levels in Patients with Advanced Prostate Cancer-Results of a Phase IIb Randomized Controlled Trial." Journal of Cancer 4.7 (2013): 597. 
• Srivastava, Janmejai K., and Sanjay Gupta. "Tocotrienol-rich fraction of palm oil induces cell cycle arrest and apoptosis selectively in human prostate cancer cells." Biochemical and biophysical research communications 346.2 (2006): 447-453.
• Tang, Yaxiong, et al. "Lycopene enhances docetaxels effect in castration-resistant prostate cancer associated with insulin-like growth factor I receptor levels." Neoplasia 13.2 (2011): 108-119. 
• Ting, Harold, Gagan Deep, and Rajesh Agarwal. "Molecular mechanisms of silibinin-mediated cancer chemoprevention with major emphasis on prostate cancer." The AAPS journal 15.3 (2013): 707-716. 
• Tokar, Erik J., and Mukta M. Webber. "Chemoprevention of prostate cancer by cholecalciferol (vitamin D3): 25-hydroxylase (CYP27A1) in human prostate epithelial cells." Clinical & experimental metastasis 22.3 (2005): 265-273.
• Verhoeven, Dorette T., et al. "Epidemiological studies on brassica vegetables and cancer risk." Cancer Epidemiology Biomarkers & Prevention 5.9 (1996): 733-748.
• Wilson, Kathryn M., et al. "Coffee and risk of prostate cancer incidence and mortality in the Cancer of the Prostate in Sweden Study." Cancer Causes & Control 24.8 (2013): 1575-1581.
• Woo, Tony Choon Seng, et al. "Pilot study: potential role of vitamin D (cholecalciferol) in patients with PSA relapse after definitive therapy." Nutrition and cancer 51.1 (2005): 32-36.

Happy New Year! In case this guy looks anywhere similar to how you feel after yesterdays party night, todays SuppVersity article is for you!

"Happy New Year", health, love, ... you know the whole litany, so lets get over it and straight to the things that are really important, today. The hangover cures. In the following I have compiled an extensive yet probably by no means complete list of scientifically proven hangover cures that may help better than aspirin and plenty of water (Harvard Health Letter. 2006), alone.

Apropos aspirin, its actually not too bad to start with 400-800mg of it, if you are having a hangover. It has after been shown to block the increased prostaglandin synthesis in response to alcohol ingestion and thus counter at least the inflammatory aspect of the hangover (George. 1979).
The latter cannot be said of another common pain killer: Acetaminophen, which failed to inhibit ethanol-induced subjective effects in human volunteers in a 1992 study by Pickworth et al. The same study by George et al. would yet also suggest that aspirin may also prolong the time it takes for the alcohol to leave your system completely... and this may not be your only problem, because the coingestion of aspirin and alcohol has been associated with an increased risk of gastrointestinal haemorrhage (Needham. 1971).

So what do you do if water and aspirin are not enough? Well, here are a couple of suggestions - in a more or less random order, since there are hardly any studies that compare the efficacy of one to another.

• Figure 1: Effects of 200mg tolfenamic acid on hangover symptoms in man (Kaivola. 1983).

  Tolfenamic acid - Tolfenamic acid is a very specific prostaglandin biosynthesis inhibitor that lead to significant reductions in hangover symptoms in a 1983 study by Kaivola, et al. (see Figure 1).
  
  The only problem is: The subjects consumed the 200mg of the anti-migraine drug tolfenamic acid before they started binge drinking. Whether the effects are similarly pronounced if you take it the day after remains to be elucidated.
• Gamma linoleic acid (GLA) - The omega-6 fatty acid from vegetable oils like rapeseed/canola oil and soy beans, walnuts, flax seed (linseed oil), perilla, chia, and hemp seed effectively reduced the hangover symptoms of human volunteers in a study the results of which have unfortunately never been officially published (Moesgaard; based on Pittler. 2005).
  
  In view of the fact that I have only 2nd hand access to the results I cannot tell you how much GLA you would need. Considering the effect that the supplement contained B officinalis aka Borage, which contains 26-36% GLA, if its not specifically enriched, I would yet assume that 100-300mg should do.

Figure 2: Symptoms and possible contributers of hangover (Swift. 1998).

• Yeast + B-Vitamins: Another trial tested the efficacy of 250 mg dried yeast, 0.5 mg thiamine nitrate, 0.5 mg pyridoxine hydrochloride, and 0.5 mg riboflavin in participants who consumed vodka (40% volume alcohol) amounting to a total of 100 g absolute alcohol (Laas. 1999). The difference in the change for the symptoms discomfort, restlessness, and impatience was statistically significant in favor of the yeast preparation and appear to suggest that the corresponding supplement aka "Morning Fit" works.
  
  Moreover, corresponding research from the Chungnam National University in Korea shows that a preparation of combined glutathione-enriched yeast and rice embryo/soybean extracts constitutes a  "a promising candidate for improvements of alcoholic hangover" (Lee. 2009), as well.
• Oh!K - A hangover cure with green ginger, turmeric, pepper, and green tea extract, along with salt, citric and ascorbic acid and fructose as the carrier worked pretty well in a recent study by Gopi et al. (2014).
• Sprite! Or rather a sprite-like herbal drink - In the media you may have read about Sprite, when in fact the two drinks researchers from the Sun Yat-Sen University in China tested and found to be effective in increasing the production of the enzyme that helps our bodies to get rid of alcohol were xue bi, a fizzy lemon and lime drink of which the researchers did not declare that it was indeed Sprite and hui yi su da shui, probably a type of soda water (Li. 2014).
• After Affect(R): Another commercially available anti-hangover cure "proved" to be effective in a non-randomized non-controlled trial from the Utrecht University (Vester. 2012).
  

  Table 1: Rationale for the ingredients included in After-Effect©. 1 - Total dose of 5 capsules. 2 - Only those symptoms that showed a significant improvement during alcohol hangover are listed. GLA: gamma-linolenic acid, EPA: eicosapentaenoic acid (EPA), and DHA: docosahexaenoic acid (Verster. 2012).

  If it were not for the reasonable ingredient profile (see Table 1), I probably wouldnt have listed it, but with GLA, magnesium, B-vitamins & co it does contain a bunch of ingredients that may actually help.
• Party Smart (carbonate mix) - Yet another commercial preparation that contains calcium carbonate (615 mg) and vegetable carbon (345 mg) and has - unfortunately - to be consumed while you are drinking.
  
  More specifically, the subjects in the 2004 study by Manu et al. consumed their first serving of two caplets with first drink and two more caplets every 2 to 3 hours (or 5 to 6 drinks).
  

  Figure 3: Mean hangover score and mean blood alcohol 10h after drinking (Manu. 2004).

  The data in Figure 3 does yet indicate that this alkalization regimen worked pretty well (I wonder if sodium bicarbonate would to the same ;-) is a pretty effective means to (a) keep the hangover in check and (b) help your body clear the alcohol from your bloodstream.
• Aging! Ok, I know this does not really help you today, but maybe on New Years Eve 2065! Tolstrup et al. found that hangover following engagement in binge drinking is much more common in the young than in the older age groups (Tolstrup. 2014). For women, similar results were obtained.
  
  As the scientists point out, "[t]his finding could not be explained by the usual amount of alcohol consumption, frequency of binge drinking, or the proportion of alcohol consumed with meals" (Tolstrup. 2014).

References:

• George, Frank R., and Allan C. Collins. "Prostaglandin synthetase inhibitors antagonize the depressant effects of ethanol." Pharmacology Biochemistry and Behavior 10.6 (1979): 865-869.
• Gopi, Sreeraj, et al. "Studies on the effectiveness, safety and tolerability of two doses of Anti Hangover Drink in Reducing Alcohol Induced Hangover Symptoms in Adult Male Social Drinkers." Int.J.Cur.Res.Aca.Rev. 2.8 (2014): 125-131.
• Harvard Health Letter. How to handle a hangover: drinking fluids may help with the morning-after misery from getting drunk. Harvard Health Letter 31.3(2006):3. 
• Kaivola, S., et al. "Hangover headache and prostaglandins: prophylactic treatment with tolfenamic acid." Cephalalgia 3.1 (1983): 31-36. 
• Laas I. A double-blind placebo-controlled study on the effects of Morning Fit on hangover symptoms after a high level of alcohol consumption in healthy volunteers. J Clin Res 1999;2: 9-15. 
• Lee, Heon-Sik, et al. "Effects of a preparation of combined glutathione-enriched yeast and rice embryo/soybean extracts on ethanol hangover." Journal of medicinal food 12.6 (2009): 1359-1367.
• Li, Sha, et al. "Effects of herbal infusions, tea and carbonated beverages on alcohol dehydrogenase and aldehyde dehydrogenase activity." Food & function 5.1 (2014): 42-49. 
• Manu, M. B., and S. A. Kolhapure. "Evaluation of the Efficacy and Safety of “PartySmart” in the Prevention of Alcohol-induced Hangover: A Prospective, Randomized, Double Blind, Comparative, Phase III Clinical Trial." INDIAN JOURNAL OF CLINICAL PRACTICE 15.7 (2004).
• Moesgaard S, Hansen NV. GLA effectively reduces hangovers. Pharma Nord Research, unpublished report. 
• Needham, C. D., et al. "Aspirin and alcohol in gastrointestinal haemorrhage." Gut 12.10 (1971): 819-821. 
• Pickworth, Wallace B., et al. "Acetaminophen fails to inhibit ethanol-induced subjective effects in human volunteers." Pharmacology Biochemistry and Behavior 41.1 (1992): 189-194.
• Pittler, Max H., et al. "Effectiveness of artichoke extract in preventing alcohol-induced hangovers: a randomized controlled trial." Canadian Medical Association Journal 169.12 (2003): 1269-1273.
• Pittler, Max H., Joris C. Verster, and Edzard Ernst. "Interventions for preventing or treating alcohol hangover: systematic review of randomised controlled trials." Bmj 331.7531 (2005): 1515-1518.
• Swift, Robert, and Dena Davidson. "Alcohol hangover." Alcohol Health Res World 22 (1998): 54-60. 
• Tolstrup, J. S., Stephens, R. and Grønbæk, M. (2014), Does the Severity of Hangovers Decline with Age? Survey of the Incidence of Hangover in Different Age Groups. Alcoholism: Clinical and Experimental Research, 38: 466–470. doi: 10.1111/acer.12238.
• Verster, J. C., and O. Berthélemy. "Consumer Satisfaction and Efficacy of the Hangover Cure After-Effect©." Advances in preventive medicine 2012 (2012).
• Wall, Tamara L., et al. "Hangover symptoms in Asian Americans with variations in the aldehyde dehydrogenase (ALDH2) gene." Journal of Studies on Alcohol and Drugs 61.1 (2000): 13.