Give Your Immune System a Boost on Your Next Vacation

Nothing could be more frustrating than wasting your vacation time sneezing, coughing and feeling miserable. Here are options to help keep you healthy on your next vacation.
This post was published on the now-closed HuffPost Contributor platform. Contributors control their own work and posted freely to our site. If you need to flag this entry as abusive, send us an email.

Maybe not this weekend, maybe not Thanksgiving, maybe not even Christmas, but chances are that someday soon you will be traveling.

And whether you're visiting your parents after your first semester at college or you're flying south for some fun in the sun, there is a good chance that you'll be in a plane, train or automobile with someone who has that pesky winter cold or flu.

So if you are not already congested and uncomfortable, you sure are worried that you will be once you get where you're going.

Other hazards of travel are jetlag and traveler's diarrhea. Nothing could be more frustrating than wasting your vacation time sneezing, coughing and feeling miserable. Except maybe being totally jet-lagged or running to the toilet every few minutes.

Here are some of the supplements that I use to stay healthier, beat jetlag and avoid major stomach distress when I travel:

1. Russian Choice Immune.

Probiotics like lactobacillus, a type of bacteria normally found in the human intestine, have been shown to help boost immunity. Research done in Japan indicates that these probiotics may not need to be living to accomplish this effect. (1) Russian Choice Immune is an extract made from freeze dried lactobacillus that has immune modulating effects. (2)

I first learned of this product over 10 years ago and read that it had been shown to improve immune function in people exposed to high doses of radiation. When flying at 30,000 feet, people are exposed to cosmic radiation that is filtered out by the atmosphere at lower elevations.

I reasoned that people who got sick every time they traveled might be experiencing some immune stress from cosmic rays plus exposure to poor air quality and germs in airplanes. I take 75 milligrams of Russian Choice Immune, twice a day, the day before, the day of and the day after flying.

2) NAC (N-acetylcysteine)

This amino acid is a powerful antioxidant that has been shown to:

  • enhance immune function (3)
  • enhance respiratory tract function (4)
  • assist detoxification by the liver

Research done at a university in Spain found that NAC improves immune function in postmenopausal women. The study concluded "NAC could contribute to maintenance of good health and quality of life in postmenopausal women by decreasing the probability of immune system related diseases, such as infections in aging." (5)

In an Italian study, researchers found that NAC 1,500 mg/day, reduced the development of flu symptoms by 75 percent and improved immunity among a group of seniors during an epidemic of H1N1 flu. (6)

The benefits of taking NAC may build over time. I use NAC, 1,500 mg/day, throughout the winter, especially if I will be flying.

3) Melatonin

Several studies have demonstrated improvement in jetlag with the use of melatonin. (7-9) Melatonin, a hormone naturally produced by the pineal gland at the base of the brain, is secreted in the dark and is helpful is regulating the body's internal clock.

Successful studies of melatonin's effect on jetlag have used doses as low as 0.5 mg administered at 5 p.m. the day before flying, on boarding the flight and at bedtime for three to four nights after arriving at a destination.

If insomnia is a problem, higher doses of melatonin (3-5 mg) can be used at bedtime after arriving at a destination, but higher melatonin doses sometimes cause daytime drowsiness.

Melatonin has not been studied much for westbound travel because jetlag is not as pronounced when flying west. One protocol calls for taking a low dose of melatonin (0.5 mg) at 6 a.m. the day of travel and then taking melatonin at bedtime for three to four days after arrival at a destination. (10) I often combine melatonin with NADH, a form of vitamin B3, taken at a dose of 20 mg each morning after arriving at the destination; this dose has been shown to increase daytime alertness after travel across time zones. (11)

4) Saccharomyces Boulardii

The French call this yeast "yeast against yeast." It is used for both treatment and prevention of traveler's diarrhea and antibiotic-induced diarrhea. (12) It appears to work by stimulating the immune system in the intestinal tract. In Europe it is the standard treatment for acute infectious diarrhea.

When traveling to a country where food or water-borne infection is common, the protocol is Saccharomyces boulardii, two 250 mg caps, twice a day, with or without food.

Because Saccharomyces boulardii is a yeast, it is not killed by standard antibiotics and can usually be taken at the same time they are taken. The brand used in the research studies comes from France and is marketed under the trade name Florastor in the U.S.

Staying Healthy--It's All in the Mix

In wintertime you feel like you need to arm yourself with preventive and healing remedies. So you pick up some cold medicine and stomach remedies at the drug store, and some vitamins or herbs at the health food store, and hope they do the trick.

Anything to shield yourself from getting sick.

But you also need to know how all these different drugs, supplements and over-the-counter remedies might interact, for better or worse. That's why I created a web application called Pill Advised, where you can learn about interactions between medications and vitamins.

Now I'd like to hear from you ...

What is your number one health concern on trips?

Do you take anything special to stay healthy when you travel?

Does it work? Has your doctor helped?

Please let me know your thoughts by posting a comment below.

Best Health,

Leo Galland, MD

Leo Galland, MD is a board-certified internist, author and internationally recognized leader in integrated medicine. Dr. Galland is the founder of Pill Advised, a web application for learning about medications, supplements and food. Sign up for FREE to discover how your medications and vitamins interact. Watch his videos on YouTube and join the Pill Advised Facebook page.


1) J Nutr. 2006 Dec;136(12):3069-73.PMID: 17116721 "Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults." Hirose Y, Murosaki S, Yamamoto Y, Yoshikai Y, Tsuru T.

2) Inflamm Allergy Drug Targets. 2010 Jul 1;9(3):192-6. "Lactobacillus rhamnosus cell lysate in the management of resistant childhood atopic eczema.Hoang BX, Shaw G, Pham P, Levine SA.

3) Free Radic Biol Med. 2008 Nov 1;45(9):1252-62. Epub 2008 Jul 27. "The glutathione precursor N-acetylcysteine improves immune function in postmenopausal women." Arranz L, Fernández C, Rodríguez A, Ribera JM, De la Fuente M.

4) Clin Ther. 2000 Feb;22(2):209-21." Efficacy of oral long-term N-acetylcysteine in chronic bronchopulmonary disease: a meta-analysis of published double-blind, placebo-controlled clinical trials." Grandjean EM, Berthet P, Ruffmann R, Leuenberger P.

5) Arranz L, Fernández C, Rodríguez A, Ribera JM, De la Fuente M in Free Radic Biol Med. 2008 Nov 1;45(9):1252-62. Epub 2008 Jul 27.

6) Eur Respir J. 1997 Jul;10(7):1535-41 "Attenuation of influenza-like symptomatology and improvement of cell-mediated immunity with long-term N-acetylcysteine treatment." De Flora S, Grassi C, Carati L.

7) Aviat Space Environ Med. 2001 Jul;72(7):638-46. "Effectiveness and tolerability of melatonin and zolpidem for the alleviation of jet lag." Suhner A, Schlagenhauf P, Höfer I, Johnson R, Tschopp A, Steffen R.

8) Chronobiol Int. 1998 Nov;15(6):655-66. "Comparative study to determine the optimal melatonin dosage form for the alleviation of jet lag." Suhner A, Schlagenhauf P, Johnson R, Tschopp A, Steffen R.

9) J Appl Physiol. 2004 Jan;96(1):50-8. Epub 2003 Sep 5. "Caffeine or melatonin effects on sleep and sleepiness after rapid eastward transmeridian travel." Beaumont M, Batéjat D, Piérard C, Van Beers P, Denis JB, Coste O, Doireau P, Chauffard F, French J, Lagarde D.

10) J Clin Endocrinol Metab. 2006 Jan;91(1):54-9. Epub 2005 Nov 1. "Advancing human circadian rhythms with afternoon melatonin and morning intermittent bright light." Revell VL, Burgess HJ, Gazda CJ, Smith MR, Fogg LF, Eastman CI.

11) Wien Med Wochenschr. 2002;152(17-18):450-4. "Stabilized NADH (ENADA) improves jet lag-induced cognitive performance deficit" Birkmayer GD, Kay GG, Vürre E.

12) World J Gastroenterol. 2010 May 14;16(18):2202-22. "Systematic review and meta-analysis of Saccharomyces boulardii in adult patients." McFarland LV.

This information is provided for general educational purposes only and is not intended to constitute (i) medical advice or counseling, (ii) the practice of medicine or the provision of health care diagnosis or treatment, (iii) or the creation of a physician--patient relationship. If you have or suspect that you have a medical problem, contact your doctor promptly.

Support HuffPost

Popular in the Community