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Food Additives - PowerPoint PPT Presentation


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Food Additives. “More Nutritious than ever” “New improved flavor” “Stays fresher longer” What are Food additives? Are they good? or Bad?. What are Food Additives?. Any substance a food producer intentionally adds to a food for a specific purpose Around 3,000 additives are used.

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food additives
Food Additives
  • “More Nutritious than ever”
  • “New improved flavor”
  • “Stays fresher longer”
  • What are Food additives? Are they good?

or Bad?

what are food additives
What are Food Additives?
  • Any substance a food producer intentionally adds to a food for a specific purpose
  • Around 3,000 additives are used
natural additives
Natural Additives
  • Occur naturally in food and plants
    • Salt, sugar, seaweed, acids
artificial or synthetic additives
Artificial, or Synthetic Additives
  • Made in a laboratory
    • Chemicals are joined or modified in the lab
how additives are used
How Additives are Used
  • Improve storage properties, increase healthfulness, make food more appealing and improve processing and preparation
  • We often feel misled and deceived by

additives

food storage
Food Storage
  • 200 years ago we had to eat fresh foods
  • Can be natural or artificial
  • Keeps food preserved prevents mold, bacteria, spoiling, browning…
increase healthfulness
Increase Healthfulness
  • Fortification: adding a nutrient not normally found in a food
increase healthfulness1
Increase Healthfulness
  • Restoration: reestablish the products original nutritional value
increase healthfulness2
Increase Healthfulness
  • Enrichment: Includes restoration of nutrients as well as the addition of more nutrients
    • Thiamin, niacin, riboflavin, iron…
increase healthfulness3
Increase Healthfulness
  • Nutrification: Adding nutrients to a food with low nutrient value to replace a meal
    • Nutrified bars and shakes
make food appealing
Make Food Appealing
  • Color: added to drinks, cereal, jams……
    • Most are Synthetic: identified with a number
    • Very few are natural
make food appealing1
Make Food Appealing
  • Flavor: 2,000 of the 3,000 additives are for flavor
    • Demand for natural flavors far exceeds supply
    • MSG
make food appealing2
Make Food Appealing
  • Sweeteners: most common of all flavor enhancers, improve aroma and taste
    • Nutritive and Nonnutritive
make food appealing3
Make Food Appealing
  • Nutritive Sweeteners: metabolize to produce calories
    • Table sugar, brown sugar, maple syrup, molasses, honey…
    • Sorbitol: absorbs slowly, does not taste as sweet
make food appealing4
Make Food Appealing
  • Nonnutritive Sweeteners: Artificial, no calories, taste sweet
    • Low-calorie and calorie free products
make food appealing5
Make Food Appealing
  • Splenda uses sucralose: 600 time sweeter then sugar, produces no calories, chemical change to sugar molecule, can cook with it
make food appealing6
Make Food Appealing
  • Sweet’N Low uses Saccharin: 300 times sweeter, made from petroleum products, can cook with it
make food appealing7
Make Food Appealing
  • Aspartame: 200 times sweeter, no calories, cannot use in cooking, loses sweetness in beverages
aspartame facts
Aspartame Facts
  • “Available evidence suggests that consumption of aspartame by normal humans is safe and is not associated with serious adverse health effects”
  • Added to more than 6,000 food products
  • Body breaks it down into aspartic acid, methanol and phenylalanine
aspartame facts1
Aspartame Facts
  • Approved intake is 50mg/kg of body wt/day
    • 12 oz diet soda: 225mg
    • 8 oz yogurt: 80mg
    • 4 ozjello: 32mg
  • 18kg/40lb child would have to consume 4 12oz cans of soda or nine 8oz glasses of fruit
aspartame facts2
Aspartame Facts
  • http://www.youtube.com/watch?v=lqIFDoOwSFM
  • http://www.youtube.com/watch?v=nrahc-KfBRo&feature=related
processing preparation
Processing & Preparation
  • Improve texture, a stabilizer to keep mixture balanced
    • Peanut butter and ice cream
acceptable daily intake adi
Acceptable Daily Intake (ADI)
  • Amount in mg that a person can safely consume on average every day over a lifetime without risk
  • Conservative level
  • Amount 100 times less than the maximum level at which no observed effect occurs in animals
regulations of additives
Regulations of Additives
  • FDA monitors safety of additives
    • 1/100 of the amount of an additive found to be safe in lab animals
  • GRAS list: Generally Recognized as Safe 670 items that are not regulated as additives
what are the long term effects
What are the long term Effects???
  • Long term effects are impossible to predict
    • Nitrates: used to cure meat now being linked to colon cancer
    • Saccharin removed from GRAS list show to cause cancer in lab animals
allergies
Allergies
  • Sulfites- preservative FDA reduced the amount allowed
  • MSG- flavor
  • BHT- preservative
poor eating habits
Poor Eating Habits
  • Increase fortified food decrease a diversified diet
  • Increase fortified food, challenge to determine nutritional balance
unneeded additives
Unneeded additives
  • Oil-based waxes on fruit = shinier = increased sales
    • FDA approved as a preservative
  • Unnatural standards for foods
  • Raises price
  • Begin to prefer artificial over real
safety improved nutrition
Safety & Improved Nutrition
  • Preservatives extend the shelf life
  • Additives prevent diseases caused by malnutrition
    • Goiters, Iodine added to table salts
    • Rickets, Vitamin D added to milk
    • Pellagra, iron added to flour and cornmeal