Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Body fat percentage wikipedia , lookup
Adipose tissue wikipedia , lookup
Food studies wikipedia , lookup
Diet-induced obesity model wikipedia , lookup
Obesity and the environment wikipedia , lookup
Food politics wikipedia , lookup
Food choice wikipedia , lookup
Human nutrition wikipedia , lookup
Food Science Nutrients – what do we need? What is food? • Something that living organisms take into their bodies to: – provide us with energy – help us to develop – to keep us warm – prevent disease – Live • We need food for all these processes The Magnificent 7 (food substances) Fibre Minerals Carbohydrates A Healthy Diet Water Fat Vitamins Protein Carbohydrates • Most common source of energy • Found in breads, potatoes, cereals and pasta • Sustained energy • If not used up – gets turned into fat • 4 – 5 portions a day Fibre • Needed to maintain healthy digestive system – not strictly a nutrient • Found in – wholegrain breakfast cereals – wholegrain, granary or seeded breads – brown rice – fruit and vegetables – beans and pulses – nuts and seeds Minerals • Chemical elements needed to keep you healthy • Maintain immune system • Helps cells and organs do their jobs • Found in: – Fruit – Vegetables Vitamins • • • • ‘Vital’ for life, can’t live without them Only tiny amounts needed Vitamin A, C, E Found in: – Fruit – Vegetables Fat • • • • • Supplies energy Insulates us Fuel reserve Needed as building blocks Found in: – Meat – Olive oil – Butter – Milk – Nuts • To much is not good Proteins • Needed to build and repair new cells • Builds muscle • Found in: – Meat and fish – Dairy products – Soy products – Nuts and pulses – Eggs • 12 % of daily intake Water • • • • Between 50-60 % of your body is water Needed for healthy body Should drink 6 – 8 glasses a day Found in: – Fruits (watermelon) – Vegetables (cucumber) – Taps • Need more when exercising • Brain is 80% water, being dehydrated effects your concentration A balanced diet • Each food should be eaten in the right proportions Fruit and vegetables Bread, other cereals and potatoes Milk and dairy foods Meat, fish and alternatives Foods containing fat Foods containing sugar Food scientists • Investigate foods to determine which nutrients they contain • Test for: – Carbohydrates – starch and glucose – Fat – Protein Carbohydrates • Starch – Long chain carbohydrate (complex) • Glucose – Smaller, usable molecule • Two tests: – Benedicts for glucose – Iodine for starch Testing our food: Starch Testing our food: Glucose Testing for Fat • Fat – emulsion test Testing for Protein • Biuret test for protein • Complete a spider diagram entitled Nutrients showing – Each of the seven nutrients – What we need them for – An example of each