Carbohydrates is the main source of energy for the body which enables it to move, produce heat make sound, digest food, use the brain
Fats gives energy, insulates the body from the cold, protects the bones and kidneys, provides vitamins A,D,E,K
Protein helps the growth and repair the body when its injured and it gives the body energy.
Starches – found in cereal grains such as rice, wheat, oats, plus starchy tubers (potatoes and sweet potatoes) and vegetables (carrots, beets, corn)
Sugars – lactose found in milk and dairy, fructose found in honey, fruits and some vegetables (peppers, tomatoes etc.)
Carbohydrates
Two types:
Starchy (complex)
provide energy when broken down – slow release energy to the body (wholegrain provide slower release carbohydrates)
2. Sugary (simple) provide quick release energy to the body's’ cells.
Deficiency of carbohydrates is extremely rare in the UK.
Long term lack of carbohydrates in the diet can cause Ketosis – a condition where the body switches to using protein as an energy source.
Visible symptoms- lack of energy and weight loss.
Non- visible symptoms- Not enough fibre from wholegrains foods leads to constipation and other intestinal problems.
too much carbohydrates
If not used for energy it becomes stored as fat. Visible symptoms weight gain and obesity.
Non- visible- eating too much non refined(white carbs) leads to tooth decay, raising blood sugar levels and type 2 diabetes
High Biological Value (HBV) protein: Meat, fish, poultry, eggs,
Low Biological Value (LBV) protein: Tofu, beans, nuts.
Protein is digested by the body into its component parts – called amino acids. There are 8 which are essential for adults and 12 for children. HBV protein foods contain all the essential amino acids.
Protein
Visible symptoms-
Wasting of muscle & muscle loss
Oedema – build up of fluids in the body
Slow growth in children
Severe deficiency leads to kwashiorkor (bloating of the stomach)
Non-visible symptoms- weaker immune system which needs protein to function properly.
Too much protein
Visible symptoms excess stored as fat, lead to weight gain and obesity.
Non-visible symptoms- Puts a strain on how well the kidneys work.
Sources of fats
Butter, cheese, dairy foods including yogurt, crème fraiche, milk
Oils, lard, suet, dripping.
Fat is a term used to describe lipids – this can refer to solid fats and oils. Fat is broken down by the body and used for energy,
Also used to provide warmth when stored under the skin.
Is a dietary carrier of fat soluble vitamins A, D, E & K.
Two types of fats: Unsaturated and saturated.
Deficiency of fats
Visible symptoms- Weight loss over time as the body uses stores of fat. Person feels cold as fat under skin acts as insulator.
Non-visible symptoms- Bruising of the bones as they are not protected. Lack of fat in the diet can lead to deficiencies of fat soluble vitamins A, D, E & K.
Too much fats
Common issue in the UK
Visible symptoms- Stored under the skin in adipose tissue cells, which leads to disease such as type 2 diabetes, obesity and heart disease and high bloody pressure.
Non-visible symptoms- Internal organs store fat which prevents them working properly. Fat blocks arteries.
Vitamin C is needed for Normal structure and function of connective tissue e.g. collagen.
Helps healing process.
Antioxidant (protects from free radicals).
Helps absorb iron in the body.
Improves immune system.
Vitamin C is found in Main sources from plants – fruits and vegetables.
Milk and liver contain small amounts.
If there is a deficiency of vitamin c:
Scurvy, very rare symptoms include bleeding gums, wounds not healing properly, tiredness.
Lack of vitamin C effects absorption of iron. Excess is eliminated from the body within 24 hours so not a problem.
Vitamin B1Thiamin is needed for Normal function of the nervous system and heart
Thiamin is found in Whole grains, meat, flour and breakfast cereals
Vitamin B1
Deficiency-Beri-beri (disorder of the nervous system).
Excess-body excretes it.
Vitamin B2riboflavin is needed for Release of energy from food.
Vitamin B2 is found in Milk, eggs, green vegetables, cereals.
If there is a deficiency of vitamin 2:
Deficiency
Dry cracked skin around the mouth and nose.
Excess-body excretes it.
Vitamin B3 is needed for Energy release, skin and membranes.
Vitamin B3 is found in Milk, eggs, cheese, meat.
If there is a deficiency of vitamin B3
Deficiency- disease pellagra. Symptoms can include dermatitis, dementia and diarrhoea.
Excess-body excretes it.
If there is a deficiency in vitamin b3niacin
Deficiency- disease pellagra. Symptoms can include dermatitis, dementia and diarrhoea.
Excess-body excretes it.
Vitamin B9folate is needed for Red blood cells and nervous system.