Food Processing

Food Processing

  • Processed foods are those that have been mechanically or chemically altered at home or in commercial settings.

Reasons for Processing Foods

  • Safety: Ensures food items are safe to eat.

  • Convenience: Saves time and energy in food preparation at home.

  • Product Innovation: Facilitates the creation of new food products.

  • Healthier Options: Offers better and healthier food alternatives.

  • Diet Variety: Provides a means to vary dietary options.

  • Shelf-life Extension: Increases the duration that food can be stored without spoiling.

  • Seasonal Availability: Allows for a wide range of choices regardless of the season.

  • Fortification: Enables the adding of essential nutrients to food items.

Types of Processing

Primary Processing

  • Refers to processes that change basic foodstuffs to improve their keeping quality and make them ready for cooking or eating.

    • Examples:

      • Milling wheat into flour.

      • Pasteurizing milk to ensure safety.

      • Extracting vegetable oil from seeds and nuts.

Secondary Processing (Convenience Foods)

  • Involves using a basic processed food to produce a new food product.

    • Examples:

      • Margarine production from vegetable oil.

      • Baking breads, cakes, and biscuits from flour.

      • Producing dairy products from milk.

      • Creating convenience meals from pre-processed items.

Range of Processed Foods

  • Dairy Products: Milk, cheese, yoghurt.

  • Spreads: Butter, margarine, various spreads.

  • Grains/Pasta: Flour, pasta, rice.

  • Bakery Products: Bread, cakes, biscuits, breakfast cereals.

  • Convenience Foods: Ready-to-eat or minimally prepared food options.

Convenience Foods

  • Foods that have been partially or fully prepped for consumer ease.

Advantages

  • Saves time, labor, and fuel.

  • Requires minimal cooking skills.

  • Results in less food waste.

  • Often fortified with nutrients.

  • Convenient storage options.

  • Wide selection available.

Disadvantages

  • Typically more expensive than non-processed counterparts.

  • May contain preservatives and additives.

  • Often lower in fiber content.

  • Higher levels of salt, sugar, and fats.

  • Potentially poorer taste, color, and texture compared to fresh foods.

Classification of Convenience Foods

Examples of Each Class

  • Frozen Foods: Including meats, fish, vegetables, fruits, complete meals, and desserts.

  • Dried Foods: Such as milk, soups, sauces, fruits, baking mixes.

  • Canned/Bottled Foods: Items like fish, vegetables, soup, fruit, jams, pickles, and sauces.

  • Cook-chill Foods: Refrigerated items like soups, sauces, quiches, and lasagne.

  • Take-away Foods: Includes chips, burgers, pizzas, breakfast rolls, etc.

Functional Foods

  • These are foods known for their health benefits beyond basic nutrition.

    • Plant Sterols: Help reduce cholesterol levels (e.g. "Benecol", "Flora Pro-Active").

    • Probiotics: Promote gut health (e.g. Bio yoghurts - "Activia", "Vitallity").

    • Omega-3 Fatty Acids: Linked to a lower risk of heart disease and cancer, found in milk and yoghurts.

    • Fortified Foods: Those that have added nutrients.

Profile of Three Types of Processed Foods

  • Extensively Processed Foods: Example is milling wheat to create flour.

  • Shelf-life Extended Foods: Long-life milk is an example.

  • Added-value Foods: Involves processing raw materials for high economic value, such as cook-chill products.

Genetically Modified Foods (GM Foods)

  • GM foods have altered DNA to modify characteristics like size, ripening speed, and disease resistance.

  • Their usage is heavily regulated in Ireland, with modified soya beans and maize being in restricted use.

  • EU regulations mandate labeling for GM foods.