3.3 Nutrition - Supporting digestion Flashcards
What is Digestion?
Digestion is a mechanical (e.g. chewing) and chemical process.
Chemical digestion is aided by digestive juices including saliva, gastric juice, pancreatic juice and bile
Good digestion is as important as the quality of food we eat
How can digestion be impaired?
- Inadequate chewing
- Over eating (snacking, eating more than three meals a day)
- Drinking whilst eating (which dilutes the digestive juices)
- Chronic stress
- Eating junk food/refined sugars (slows peristalsis)
- Mindless eating (e.g. not being aware of what you’re eating)
How can we support good digestion?
- Avoid drinking with meals
- Mindful eating: eating the table, actively tasting food, being aware of where it came from and how you feel in terms of satiety/ fullness
- Apple cider vinegar in a little water 10 to 15 minutes before meals
- Zinc and B-6 rich foods (used the gastric acid production)
- Ensure good hydration (bile and saliva production)
- Eat fermented vegetables (e.g. sauerkraut) and prebiotic foods (e.g. chicory, garlic) to encourage healthy gut bacteria
How can herbs help to support digestion?
Bitter herbs (e.g. gentian, barberry, dandelion) and foods (e.g. rocket, chicory, artichokes) increase the production of digestive juices (e.g. gastric juice, pancreatic juice and bile flow)
Choloretic/chologogue herbs that stimulate the production and flow of bile* including dandelion root, globe artichoke, barberry, fringe tree and greater celandine
Take a a small cup of tea or tincture, 15 to 20 minutes before meals
*for those who have difficulties digesting fats
What is the MMC?
The ‘migrating motor complex’ (MMC)
How does the MMC help prevent SIBO?
- Peristaltic waves create a ‘broom-like’ activity
- Bacteria are transported from the small to the large intestine
What is the impact of snacking on the MMC?
The MMC operates most effectively when there is at least a four hour fasting window between meals
Snacking prevents this ‘self-cleaning’ mechanism, impairing healthy digestion and immune function
How can the burden on the digestive system be reduced?
- Intermittent fasting: leaving a 16 hour fasting window after the evening meal
- Eating smaller meals and avoid overeating; listen to the body’s satiety signals
- Minimise ‘heavier’ proteins such as animal-based proteins and soya
- Chew food thoroughly – up to 20 times per bite
- Stimulate parasympathetic nervous system by using diaphragmatic breathing
- Ensure good sleep hygiene
What are the effects improper food combining ?
- Bloating
- Flatulence
- Heartburn
- Acid reflux
- Diarrhoea
- Impairs digestion => lower absorption of nutrients
Who was Dr Hay?
A New York physician, who began developing the food combining diet in 1904 because of his own poor health
What is the premise of the Hay diet?
- Proteins and starches require different conditions for digestion
- If consumed together, digestion time is slowed and nutrient absorption impaired
- Focus on whole foods, along with increased fruit and vegetables
What is the reason for separating foods in the Hay Diet?
- Proteins require an acidic environment to be digested (the stomach)
- Proteins take longer to digest than starches.
- Starches require an alkaline environment (the small intestine)
What are the combining rules of the Hay Diet?
- Proteins must be eaten separately from starches. by 3 to 4 hours
- Neutral foods can be eaten either with protein or with starches (most vegetables, fats and oils)
- Sweet fruits can be eaten with starch meals (bananas, figs, dates, grapes)
- Acid fruit can be eaten with protein meals (oranges, lemons, limes, pineapple, kiwi fruit)
What are the considerations of fruit in food combining?
- Fruit is more rapidly digested than other foods because of the higher water content and simple sugars*
- Bloating and flatulence can occur when breakdown of fruit is slowed by the presence of other food
*Sweet fruit, e.g. bananas, figs, dates, grapes take longer to digest
What is the ideal consumption of fruit in food combining?
- Eat fruit away from other foods including vegetables
- The exception is juicing, where low starch vegetables (celery, leafy greens and cucumber) can be combined with fruit, except sweet fruit
- Do not combine acidic fruit (citrus, kiwifruit, tomatoes, pineapple) with sweet fruit (bananas, figs, grapes, dates)
- Always eat melons (e.g. watermelon, cantaloupe) on their own (do not mix with other fruit) as they are fully digested within 30 minutes