Probiotics seem to be something that everyone is talking about these days, but what exactly are they? What do they do? Where do they come from? How do I know if I need one?
'Probiotic' literally means 'for life'. More often are defined as being "viable microorganisms that have a beneficial effect in the prevention and treatment of specific pathologic conditions when they are ingested". Basically they are the good bacteria that should be found in your gut. Did you know that approximately 85% of your immune system is found in the gut? This is because it is the job of these good bacteria to be the gatekeepers to our body. They are our first defence against foreign bodies, preventing colonization by viral and bacterial pathogens.
Wondering where you got your good bacteria from in the first place? Your mum! During a vaginal delivery the baby is covered in secretions which contain it's mothers bacteria. The mother passes her gut flora on to her baby and this in turn colonizes their gut. From that day forward we are constantly changing our gut flora depending on what we ingest. We are exposed to coughs, colds, travel, different foods, medications and all of these impact our gut ratio between good and bad bacteria.
Sat there thinking well my granny hasn't taken a probiotic and she never gets ill at 96! The truth is that she has probably had her fair share of 'probiotics' but they just didn't call them that then. Traditionally fermented foods like sauerkraut, kefir, kombucha, raw yoghurt and even beer were all sources of good bacteria. In the days before fridges and supermarkets, fermentation was a way of preserving produce to survive long winters.
These days everything goes in the fridge, crops are sprayed with pesticides which just like the antibiotics you get from the doctors are not selective about whether the bacteria they are killing is good or bad. Most supermarket products have also been pasteurised to extend shelf life and prevent outbreaks of harmful bacteria. This means that the good bacteria in traditionally fermented foods is killed along with any bad that may have been present.
The good news is that there is now a move back towards traditional probiotics with kefir, kombucha, and sauerkraut gaining in popularity. Thinking about stocking up on those yoghurt drinks from the supermarket? Think again! Did you know that many of them have more sugar per 100g than fizzy pop? One of the easiest ways to up your good bacteria is to take a probiotic supplement many of which also contain prebiotics (food not absorbed by the host that supports the growth of good bacteria).
So do you need a probiotic? The reality is that most of us should take a probiotic supplement even just in the short term. Why? The vast majority of us have at some point done at least one of the following all of which negatively effect your gut flora: taken an antibiotic; suffered from colds and viruses; have IBS or IBD; taken the contraceptive pill; taken steroids; travelled abroad; suffer from or have a family history of auto immune conditions e.g. under-active thyroid, diabetes, lupus, psoriasis, etc; or allergenic conditions e.g. food allergies and excema.
There is a wealth of research out there which clearly demonstrates the huge role that probiotics have in supporting our immune system and preventing disease. A recent study examining the role of probiotics in the reduction of diabetes states that probiotics contribute to a reduction in inflammatory response and oxidative stress. This leads to increased insulin sensitivity and a reduction in the autoimmune response.
Allergenic diseases have increased over the last 40 years in industrialized nations but NOT in the developing world. Put simply we are just too clean, our homes and farms are sprayed to within an inch of their lives, we eat processed foods and we aren't exposed to the diseases we once were. All of this impacts on our gut flora and prevents the normal responses to allergens from developing properly leading to an increase in disease. Children with food allergies have been found to have an imbalance between good bacteria and potentially harmful ones. The same has been observed in a study of children with atopic eczema.
So which one should I take? Well the answer is it really depends on you and what your individual needs are. A good starting point would be something like Bio-Kult or Optibac for everyday. However, there are a variety of ranges designed specifically for different needs: travel abroad, when your taking antibiotics, pregnancy, breastfed babies, bottlefed babies, managing cholesterol levels, one for women, the list goes on.
Still not sure, or just want to know more? Pop into the shop and have a chat with us.
R. Rolfe. (2000) The Role of Probiotic Cultures in the Control of Gastrointestinal Health. Journal of Nutrition. 130 p.3965-4025
M.Geuking et al. (2014) The interplay between the gut microbiota and the immune system. Gut Microbes 5(3) p. 411-418
P. Kirjavaninen et al. (2001) Characterizing the composition of intestinal microflora as a prospective treatment target in infant allergic disease. FEMS Immunology & Medical Microbiology. 32 (1) p. 1-7
B. Bjorksten et al. (1999) The intestinal microflora in allergic Estonian and Swedish 2-year-old children. Journal of the British Society for Allergy and Clinical Immunology. 29(3) p 342-346.
A.Gomes et al. (2014) Gut microbiota, probiotics and diabetes. Nutrition Journal. 13(60)
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