What is the microbiota?
The microbiome is made up of trillions of microorganisms from thousands of different species; these microorganisms are also called the microbiota. Most of this community of bacteria, fungi, parasites and viruses is helpful or harmless.[1]
The mix of species in the microbiota can change with factors such as diet, medications and exercise. Scientists are only beginning to understand the broad role the microbiome plays in health.[1]
Fiber and prebiotics
A high-fiber diet has a particular effect on the types and amounts of microbiota in the gut. Microbes in the large intestine ferment fiber and produce short-chain fatty acids. Because these fibers feed the helpful microbiota, they are also called prebiotics.[1]
The Turkish Dietary Guidelines (TÜBER) recommend that adults get at least 25 g of fiber a day. According to the guidelines, fiber matters for a healthy gut flora because it contains the prebiotics that helpful bacteria need; by adding bulk and softness to stool, it also helps your bowels work regularly and helps prevent constipation.[2]
- Legumes
- 11–26%
- Lentils, dried beans, chickpeas
- Nuts
- 5–14%
- Walnuts, hazelnuts, almonds
- Grain products
- 4–7.5%
- Fiber content drops sharply as the bran is removed
- Vegetables
- 3–4%
- Raw vegetables contain more fiber than cooked ones
- Fruits
- 1–2%
- Fruits eaten with their peel contain more fiber than peeled ones
- Whole grain, oat or rye bread instead of white bread[2]
- Bulgur instead of rice or pasta[2]
- Whole fruit instead of fruit juice; fruits with an edible peel washed well and eaten with the peel[2]
- Vegetables or a salad at every meal[2]
- Legumes 2–3 times a week[2]
Increasing prebiotic-rich foods all at once can cause gas and bloating, so adding them slowly is recommended.[1]
Fermented foods and probiotics
Yogurt, kefir, some cheeses, fermented vegetables that have not been heat-treated, and boza (a fermented grain drink) are among the fermented foods that may contain live microorganisms. In some fermented foods, such as bread or heat-treated, pasteurized vegetables, the microorganisms used to make them are no longer alive when you eat them.[1, 2]
The terms probiotic, fermented food and probiotic fermented food are often used interchangeably, and people expect the same health effect from all of them. International authorities, however, define these terms separately.[2]
If your digestive symptoms come with any of the signs below, they may point to another health problem.[4]
How we work together in counseling
We work from a functional medicine perspective, and our priority is supporting your gut health. First, we look together at your eating pattern, your digestive symptoms and any test results you have.
Then we bring things like fiber, fermented foods and meal timing into your diet in steps that suit you. If needed, we plan personalized protocols such as a low FODMAP or elimination diet, and we look at supplements based on your needs and the medications you take. Sessions can be face to face or online.
Common questions
- Is eating yogurt or kefir every day good for my gut?
- Yogurt and kefir are fermented foods that may contain live microorganisms. But under international definitions, fermented foods, probiotics and probiotic fermented foods are separate concepts, so you shouldn't expect the same effect from every fermented food.[1, 2]
- Should I take a probiotic supplement?
- In most cases, it is not yet known which probiotics are helpful, and the effects vary by strain. The risk is higher for people with a serious illness or a weakened immune system. If you are thinking about a supplement, talk to your health care provider first.[3]
- What happens if I increase fiber all at once?
- Increasing prebiotic-rich foods all at once can cause gas and bloating. Increasing them slowly is recommended.[1]
Something on your mind?
This page is general information; it does not diagnose and does not replace your doctor's advice. Let's talk about a plan made for you.
Sources
- 1.Harvard T.H. Chan School of Public Health. The Nutrition Source: The Microbiome. nutritionsource.hsph.harvard.edu/microbiome/
- 2.T.C. Sağlık Bakanlığı Halk Sağlığı Genel Müdürlüğü (Republic of Türkiye Ministry of Health, General Directorate of Public Health) (2022). Türkiye Beslenme Rehberi (TÜBER) 2022 (in Turkish). Sağlık Bakanlığı Yayın No: 1031, Ankara. hsgm.saglik.gov.tr/depo/birimler/saglikli-beslenme-ve-hareketli-hayat-db/Dokumanlar/Rehberler/Turkiye_Beslenme_Rehber_TUBER_2022_min.pdf
- 3.National Center for Complementary and Integrative Health (NCCIH). Probiotics: Usefulness and Safety. www.nccih.nih.gov/health/probiotics-what-you-need-to-know
- 4.NIDDK. Diagnosis of Irritable Bowel Syndrome. www.niddk.nih.gov/health-information/digestive-diseases/irritable-bowel-syndrome/diagnosis