How your Gut Health Affects your Skin

Suffering with problem skin?  An unlikely, but very good place to look for answers is your gut. More and more research is connecting gut issues with problem skin.

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For healthy, clear skin, shine the spotlight on your gut. The bacteria in our intestines are akin to an organ. When healthy and in balance, our gut bacteria perform a slew of functions, including breaking down food, aiding our immune system, producing vitamins (biotin and vitamin K), preventing the growth of harmful bacteria, allergies, and disease, and a whole lot more. But when things go wrong and the bacteria in our gut are out of whack, there are consequences.

Important is the balance of bacteria; if they grow too high or low in number, or there are too many of these and not enough of those, our gut flora become harmful and turn on us – implicated in everything from cancer to weight gain. These little guys can also affect our skin and seriously compromise our self-confidence in the process.

Bad Bacteria

Our skin’s health depends greatly on that of our gut.  Over a century ago, dermatologists Drs Stokes and Pillsbury linked changes in the microbial flora to inflammation that can manifest in the skin 1. They connected bad skin with abnormal levels of stomach acid. Stomach acid acts as a disinfectant killing bugs in the food we eat and helping to prevent infections. They explained that 40% of those with acne had low stomach acid (hypochlorhydria), a condition which induces migration of bacteria from the colon — where they should remain — to the small intestine where they do not belong.

Bacterial infiltration in the small intestine can lead to a condition called small intestinal bacterial overgrowth (SIBO),2 which shares many symptoms with irritable bowl syndrome (IBS) and is often misdiagnosed as such.

SIBO has been shown to:

  • Cause nutritional deficiencies due to maldigestion and malabsorption of proteins, fats, and carbs, as well as vitamins. SIBO can lead to deficiencies in vitamin B12, as well as vitamins A, D, E, and K (fat-soluble vitamins) essential for optimal skin health and overall good health 3,4.
  • Increase intestinal permeability (or ‘leaky gut’) causing both systemic and local inflammation, which is linked with skin problems. Many acne patients for example, suffer from increased intestinal permeability.5
  • Stimulate the production of substance P, which is known to promote inflammation.7

The Link Between Acne & Your Gut

The skin’s principal function is to protect the body against physical (or mechanical) impacts, changes in temperature, microorganisms, radiation and chemicals. But research also suggests that both psychological stress and gut inflammation can compromise the integrity and shielding properties of the skin.7

What this means is that when the body is stressed and inflamed, the skin’s ability to fight bacteria is compromised — this usually further aggravates any skin infection or inflammation already present.

And here’s just some of the research connecting acne an imbalance in gut flora:

  • SIBO is 10 times more prevalent in those with acne rosacea compared to healthy controls 8.
  • Adolescents with acne are more likely to suffer from constipation, bad breath and gastric reflux. The same study found that abdominal bloating was 37% more likely to be related to acne and other seborrheic diseases 9.
  • A Russian study found that 54% of acne sufferers have significant alterations to their gut flora.10
  • Acne sufferers appear to have more bacterial strains in their stools.11

HOW TO HEAL YOUR GUT

No hard-core detox needed; simply try the following tips:

1. Check for SIBO

If you’re suffering with IBS-type symptoms such as bloating, tummy distention, cramping, abdominal discomfort, ask your doctor to check for SIBO. A direct culture is considered as the gold standard although the lactulose breath test is more widely used to test for SIBO.

If your gut has been severely affected by SIBO and you’re suffering from extensive bacterial overgrowth, you may need antibiotic therapy (check with your doctor first). Antibiotics regularly prescribed include rifaximin, metronidazole or ciprofloxacin, neomycin, and tetracycline.

2. Evaluate gastric acid production

Do you regularly suffer from heartburn and GERD? If yes, this could indicate low stomach acid as well as bacterial overgrowth in your stomach and intestines. You may also want to ask your doctor to test your stomach acid with a device called a Heidelberg capsule.

To improve your stomach’s acid production, you may want to:

  • Reduce your intake of refined carbs.
  • Steer clear of artificial fructose and artificial sweeteners.
  • Gradually increase your consumption of fresh lemon juice, apple cider vinegar and fermented foods.

3. Take a probiotic

Oral probiotics have been shown to improve skin conditions such as acne by reducing inflammation, oxidative stress and by improving the efficiency of the intestinal barrier 12. In one study, 80% of participants who received a probiotic experienced improvement in their acne.12

You could try to take Lactobacillus acidophilus and Bifidobacterium bifidum – clinical studies have demonstrated their efficiency in improving skin conditions 13.

4. Include omega-3 in your diet

An omega-3 deficient diet may increase your risks of SIBO 14, so you may want to consume wild fish at least twice a week or take a high quality omega-3 supplement.

If you suffer from acne, you could also try to eliminate pasteurized dairy products from your diet for at least a month and then gradually reintroduce one product at a time to determine whether dairy causes issues for you. Studies suggest that pasteurized unfermented dairy increases levels of insulin-like growth-factor (IGF-1), a substance that favors acne formation 15.

You may also want to keep a symptom diary to note any progress as you put each step into practice. This will help you identify what works for you specifically.

15 sources

  1. Stokes JH, Pillsbury DH (1930) The effect on the skin of emotional and nervous states: theoretical and practical consideration of a gastrointestinal mechanism. Arch Dermatol Syphilol 1930, 22:962-93.
  2. Reddymasu SC, Sostarich S, McCallum RW. (2010) Small intestinal bacterial overgrowth in irritable bowel syndrome: Are there any predictors? BMC Gastroenterol.; 10:23.
  3. Bowe WP & Logan AC. (2011) Acne vulgaris, probiotics and the gut-brain-skin axis – back to the future? Gut Pathog. 31; 3(1):1.
  4. Toskes PP (1993) Bacterial overgrowth of the gastrointestinal tract. Adv Intern Med 1993, 38:387-407.
  5. Juhlin L & Michaëlsson G. (1983) Fibrin microclot formation in patients with acne. Acta Derm Venereol. 3(6):538-40.
  6. Slominski, A. (2007). A nervous breakdown in the skin: stress and the epidermal barrier. Journal of Clinical Investigation, 117(11), 3166-3169.
  7. Gueniche, A., Benyacoub, J., Philippe, D., Bastien, P., Kusy, N., Breton, L., … & Castiel-Higounenc, I. (2010). Lactobacillus paracasei CNCM I-2116 (ST11) inhibits substance P-induced skin inflammation and accelerates skin barrier function recovery in vitro. European Journal of Dermatology, 20(6), 731-737.
  8. Parodi A et al. (2008) Small intestinal bacterial overgrowth in rosacea: clinical effectiveness of its eradication. Clin Gastroenterol Hepatol 6:759-64.
  9. Zhang H et al (2008) Risk factors for sebaceous gland diseases and their relationship to gastrointestinal dysfunction in Han adolescents. J Dermatol, 35:555-61.
  10. Volkova LA, Khalif IL, Kabanova IN. (2001) Impact of the impaired intestinal microflora on the course of acne vulgaris. Klin Med (Mosk) 79(6):39-41.
  11. Strickler A, Kolmer JA, Schamberg JF: Complement fixation in acne vulgaris. J Cutaneous Dis 1916, 34:166-78.
  12. Siver RH (1961) Lactobacillus for the control of acne. J Med Soc New Jersey, 59:52-53.
  13. Marchetti, F., Capizzi, R., & Tulli, A. (1987). Efficacy of regulators of the intestinal bacterial flora in the therapy of acne vulgaris. La Clinica terapeutica, 122(5), 339.
  14. Ralph HJ, Volker DH, Chin J (2004) Effects of omega-3 fatty acid deficiency on rat intestinal structure and microbiology. Asia Pac J Clin Nutr, 13(Suppl):
  15. Quadros, E., Landzert, N. M., LeRoy, S., Gasparini, F., & Worosila, G. (1994). Colonic absorption of insulin-like growth factor I in vitro. Pharmaceutical research, 11(2), 226-230.

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