how are b vitamins absorbed ?

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https://www.hsph.harvard.edu/nutritionsource/vitamins/vitamin-b

https://www.hsph.harvard.edu/nutritionsource/vitamins/vitamin-b
B Vitamins – Harvard T.H. Chan School of Public Health
It is also added to foods and sold as a supplement in the form of folic acid; this form is actually better absorbed than that from food sources—85% vs. 50%, respectively. Learn more about folate and health
Vitamin B6
Cardiovascular disease. High homocysteine levels are associated with an increased risk of heart disease and stroke as it may promote the formation of blood clots and excess free radical cells, and may impair normal blood vessel function. A lack of adequate vitamin B6, along with vitamin B12 and folic acid, can increase homocysteine levels.Although epidemiological studies have found that …
Vitamin B12
Cardiovascular disease. Vitamin B12 is involved in the breakdown of a protein called homocysteine. High homocysteine levels are associated with an increased risk of heart disease and stroke as it may promote the formation of blood clots and excess free radical cells, and may impair normal blood vessel function. A lack of adequate vitamin B12 can increase homocysteine levels.
B1 (Thiamin)
Thiamin (thiamine), or vitamin B1, is a water-soluble vitamin found naturally in some foods, added to foods, and sold as a supplement. Thiamin plays a vital role in the growth and function of various cells. [1]
Folate (Folic Acid)
Folate is the natural form of vitamin B9, water-soluble and naturally found in many foods. It is also added to foods and sold as a supplement in the form of folic acid; this form is actually better absorbed than that from food sources—85% vs. 50%, respectively.
Pantothenic Acid – Vitamin B5
Vitamin B5, or pantothenic acid, is naturally present in foods, added to foods, and available as a supplement. It is used to make coenzyme A (CoA), a chemical compound that helps enzymes to build and break down fatty acids as well as perform other metabolic functions, and acyl carrier protein, which is also involved in building fats. [1]
Riboflavin – Vitamin B2
Riboflavin works with other B vitamins like B6, folate, and B12 to break down homocysteine in the body. Animal studies show heart abnormalities and increased biomarkers for heart disease in riboflavin-deficient rodents, as well as cardioprotective effects of riboflavin by increasing the production of antioxidant enzymes. [6]

https://www.healthline.com/nutrition/vitamin-b-complex

https://www.healthline.com/nutrition/vitamin-b-complex
B-Complex Vitamins: Benefits, Side Effects, and Dosage – Healthline
21 avr. 2023Bottom line Taking a B-complex vitamin may benefit your health if you do not get enough B vitamins from other sources. This can include people who are pregnant, vegan, or have certain…

https://www.mayoclinic.org / drugs-supplements-vitamin-b12 / art-20363663

https://www.mayoclinic.org / drugs-supplements-vitamin-b12 / art-20363663
Vitamin B-12 – Mayo Clinic
10 août 2023Your body absorbs only as much as it needs, and any excess passes through your urine. High doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache Nausea and vomiting Diarrhea Fatigue or weakness

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9662251

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9662251
B Vitamins: Functions and Uses in Medicine – PMC
17 juin 2022Go to: Abstract B vitamins are a group of 8 water-soluble vitamins. The body does not store them, so they need to be replaced daily. B vitamins are found in animal proteins, dairy products, leafy green vegetables, and beans.

https://www.medicalnewstoday.com/articles/325292

https://www.medicalnewstoday.com/articles/325292
Types of B vitamins: Functions, sources, and deficiencies
B vitamins each have their own unique functions, but they depend upon one another for proper absorption and the best health benefits. Eating a healthful, varied diet will generally provide all the …

https://www.sciencedirect.com/science/article/pii/S1931312823004997

https://www.sciencedirect.com/science/article/pii/S1931312823004997
Navigating the B vitamins: Dietary diversity, microbial synthesis, and …
Il y a 5 joursB vitamins are integral components of the unmapped complexity of our diet, 22 with their presence varying significantly across common food items 23 (Figure 2 A; Table S1).Consequently, B vitamins play a pivotal role in distinguishing dietary patterns, such as omnivorous, vegan, and vegetarian diets. 24, 25 For instance, omnivores generally acquire higher levels of B12 from meat sources …

https://ods.od.nih.gov/factsheets/Vitaminb12-HealthProfessional

https://ods.od.nih.gov/factsheets/Vitaminb12-HealthProfessional
Vitamin B12 – Health Professional Fact Sheet
Causes of vitamin B12 deficiency include difficulty absorbing vitamin B12 from food, lack of intrinsic factor (e.g., because of pernicious anemia), surgery in the gastrointestinal tract, prolonged use of certain medications (e.g., metformin or proton pump inhibitors, discussed in more detail below in the section on interactions with medications)…

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9227236

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9227236
B Vitamins and Their Roles in Gut Health – PMC – National Center for …
7 juin 20221. Introduction B vitamins are a group of water-soluble organic compounds essential for several physiological functions of almost all living organisms [ 1 ]. The functional roles of these micronutrients are diverse, and they primarily act as cofactors in a plethora of enzymatic reactions.

https://en.wikipedia.org/wiki/B_vitamins

https://en.wikipedia.org/wiki/B_vitamins
B vitamins – Wikipedia
B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism and synthesis of red blood … The elderly and athletes may need to supplement their intake of B 12 and other B vitamins due to problems in absorption and increased needs for energy production. [medical citation needed] In cases of severe deficiency, …

https://pubmed.ncbi.nlm.nih.gov/32761878

https://pubmed.ncbi.nlm.nih.gov/32761878
Functional Roles of B-Vitamins in the Gut and Gut Microbiome
B-vitamins are also essential to the host and certain gut bacterium. Although dietary B-vitamins are mainly absorbed from the small intestine, excess B-vitamins unable to be absorbed in the small intestine are supplied to the distal gut. In addition, B-vitamins are supplied from biosynthesis by distal gut microbiota. lesoutrali bot