Notes Flashcards
Changes produced in the milk when making kefir
Lactose —> lactic acid CO2 production Increases free amino acids Increase B vitamins + flavonoids Produces anti microbial compounds Produces polysaccharides
Therapeutic properties of kefir
Improve appetite, salivation, secretion of gastric acid and pancreatic enzymes
Good sources of free amino acids
Useful in travelers diarrhea and UTIs
Diuretic effect
Chol lowering effect
Normalizing effect on the bowel
Improve immune fxn (macrophages)
Improve resistance to catching URIs
Kefir microorganisms
Lactococcus lactis Lactobacillus brevis Lactobacillus rhamnosus Leuconostoc mesenteroides Candida kefir Torulaspora delbrueckii Saccharomyces cerevisiae Streptococcus lactis
Microorganisms involved in sauerkraut and kimchi
Leuconostoc mesenteroides
Lactobacillus plantarum (can reach 1010 CFU/g)
Lactobacillus brevis
+/- Streptococcus faecalis & Pediococcus pentosaceus
Benefits of sauerkraut and kimchi
Vit C content increase 600% after 7day ferment
Final product is low glycemic index = delay gastric emptying
Decrease levels of agricultural pesticides through the ferment process
Right in strain L. plantarum
Laxative effect
Contain glutaric acid and indolent-3-carbinol which improve estrogen metab.
Contains polyamines
Bacteria associated with Bulgarian yogurt (2)
Lactobacillus delbrueckii ssp. bulgaricus
Streptococcus theramophilus
Most common and best researched prebiotics (3)
Fructooligosaccharides (FOS)
Lactulose
Galactooligosaccharides (GOS)
3 types of FOS
Insulin
Oligofructose
Neosugar
What are the sizes / types of the 3 FOS?
Insulin - largest chain, extracted from chicory roots
Oligofructose - medium chain, from inulin using enzymatic hydrolysis
Neosugar - short chain, synthesized using Funchal organism that converts sucrose to FOS
Define probiotic
Live microorganism which when administered in adequate amounts confer a health benefit on the host
Viable, microbial agents that have been demonstrated to improve health
Define food sources of live and active cultures
Contain a diverse community of microbes that are not well-defined in terms of strain composition or stability
Lack specific therapeutic qualities
What bacterial species are responsible for taste, consistency, and smell associated with yoghurt
Lactobacillus delbrueckii ssp bulgaricus
Streptococcus thermophilus
4 Essential characteristics of probiotics
- Gastric acid and bile salt stability (e.g. survival through upper GIT)
- Ability to adhere to intestinal cells
- Ability to temporarily colonies the gut
- Clinically documented and validated health effects
Differentiate species from strain
Species, like dogs
Strains, like the breeds of dogs
T/F actions and qualities of probiotics are strain specific
True
How do probiotics work?
Car park theory - they work by competing with bacteria and fungi in the GI for limited space
They are:
• Antagonists (inhibitory, secrete anti-microbial substances, bind to viruses, inhibit gene coding and thus reduce expression of pathogen factors)
• Interact with immune cells (trains and balance immune system, increase gut sIgA production, modify allergens to less allergenic forms)
• Produce beneficial compounds: SCFA (create healthy colonic environ by decreasing pH = more acidic) and polyamines (restore normal sm intestinal architecture and upregulate digestive enzyme fxn)
• Anti-inflammatory: interact with toll-like receptors
• Modify gut transit time
• Decrease visceral hypersensitivity (a problem with IBS)
• Strengthen intestinal barrier
• Alter brain chem
• Alter metabolism
T/F take probiotics on an empty stomach to optimize survival through upper GIT
FALSE
Take probiotics with food to decrease gastric acid and optimize survival
2 factors of a “good” probiotic supplement
1 - characteristics of the strains contained in supplement
2 - adequate viability
Minimum effective dosage for probiotic
*memorize this
10^9 colony forming units/dose
What condition occurs rarely in people with short small intestines?
D-lactic acidosis
Probiotic for viral gastroenteritis
L rhamnosus GG
T/F Don’t use probiotics during antibiotic treatment because the antibiotics
will kill all the probiotic bacteria
F
research clearly shows that concurrent administration not only
significantly decreases AB-related side
effects, but also attenuates AB-associated damage to the gut microbiota
Changes produced in kefir milk
Lactose —> lactic acid
CO 2 production
Increased free amino acids
‘B’ vitamins & flavonoids increase
production of antimicrobial compounds–appear to be active
against some Gram-negative bugs (e.g., E. coli)
production of a polysaccharide – kefiran
— raises activity of proteolytic enzymes in GIT (rats & in vitro)
— oral consumption has demonstrated anti-tumour activity and improvements in immune status (rats)
Leuconostoc mesenteroides
Lactobacillus plantarum (can reach 1010 CFU/g)
Lactobacillus brevis
+/- Streptococcus faecalis & Pediococcus pentosaceus
Those microorganisms are involved in?
Sauerkraut and kimchi