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Yeast and its Food Application

Yeast and its Food Application. Syeda Fatma H. Bukhari. Yeast. Eukaryotic (mostly unicellular) Classified under the kingdom Fungi. They are capable of obtaining their required energy in aerobic conditions (respiration) as well as anaerobic conditions (fermentation).

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Yeast and its Food Application

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  1. Yeast and its Food Application Syeda Fatma H. Bukhari

  2. Yeast • Eukaryotic (mostly unicellular) • Classified under the kingdom Fungi. • They are capable of obtaining their required energy in aerobic conditions (respiration) as well as anaerobic conditions (fermentation). • “Yeast” as a word comes from Old English (gist or gyst) and from the Indo-European root yes-, meaning foam, bubble or boil. • Saccharomyces cerevisiae is the most common yeast species used in processes like brewing and baking. Predictable and vigorous fermentation capabilities Tolerance towards high alcohol and sulfur dioxide levels Capability of thriving between pH 2.8 and 4 (normal wine pH)

  3. Types of Yeast Brewer's yeast Torula Nutritional yeast Baker's yeast

  4. Types of Baker’s Yeast

  5. Nutritional Yeast • Deactivated yeast, often a strain of Saccharomyces cerevisiae • Used as dietary supplements. • Nutritional yeast is rich in many basic nutrients that the body requires: B vitamins (excluding B12), chromium, minerals, amino acids and vitamins (excluding A, C and E). • Yeast also has high phosphorous content. • There are two primary sources from which nutritional yeast is derived: from brewing beer and from whey, molasses, blackstrap or wood pulp

  6. Uses of Yeast Extracts • Yeast extract is the name given to various processed yeast products obtained by extracting the cell contents (or through removal of cell walls). • They are used as food additives and flavorings, often to create savory flavors and umami taste sensations. • Yeast extracts are found in a large variety of packaged food including frozen meals, junk food, crackers, gravy, stock and more. • Liquid form of yeast extracts can be dried to produce a light paste or powder. • Glutamic acid is one of the most widely used yeast extracts and is produced from an acid-base fermentation cycle.

  7. Methods to obtain yeast extract • Autolyzed yeastextract • Consists of a concentration of yeast cells that are made to die and break up. • This is followed by the breakdown of yeast’s proteins into simpler compounds by the action of the yeast’s own endogenous digestive enzymes. • The general method of making Autolyzed yeast extract on a commercial scale is the addition of sodium chloride to a yeast suspension. The hypertonic nature of the suspension leads to the shriveling up of yeast cells, which triggers autolysis (self destruction) of yeast. • The dying yeast cells are then heated to complete their breakdown, after which the husk containing the yeast with thick cell walls is separated. This removal of cell walls changes the texture and concentrates the flavor.

  8. 2. Hydrolyzed yeast extract • Differs from autolyzed yeast extract in the use of enzymes that digest the yeast proteins. • Hydrolyzed yeast extract is produced by the digestion of yeast proteins by exogenous enzymes or acids.

  9. YEASTS: NUTRACEUTICALS & SUPPLEMENTS BY: FARIA KHAN

  10. COMMONLY USED YEASTS: BREWER'S YEAST(SACCHAROMYCES CEREVISIAE) RED YEAST RICE (MONASCUS PURPUREUS)  SACCHAROMYCES BOULARDII

  11. WHY WE NEED THEM? NUTRACEUTICALS: OSTEOARTHRITIS ANTI CANCER ANTI OXIDANT BLOOD PRESSURE IMMUNE RESPONSE MOOD CONTROL AIDS DIGESTION HEART DISEASES • portmanteau of the words “nutrition” and “pharmaceutical” • Food • Food products • provides health and medical benefits • prevention and treatment of disease

  12. BETA GLUCAN----- A SUPER FOOD • anti cancer • immuno modulator • conquering infections • cholestrol lowering • “Beta glucan is a scientifically proven biological defense modifier (BDM) that nutritionally potentiates and modulates the immune response.” It is found in the cell walls of yeast and first identified in the 1960’s by Nicholas DiLuzio, Ph.D. • The cell walls of Saccharomycescerevisiaeyeast are an important source of this polysaccharide. • Beta-D-Glucan “has bioactive and medicinal properties, which include immune stimulation, anti-inflammatory, anti-microbial, anti-infective, anti-viral, anti-tumoral, cholesterol lowering, radioprotective and wound healing.” • “the 1,3-beta-D-glucans lentinan and schizophyllan have been used clinically as adjuncts in cancer therapy.” Freimund S, Sauter M, et al, A New Non-Degrading Isolation Process for 1,3-�-D-glucan of High Purity From Baker's Yeast Saccharomycescerevisia, Carbohydr Polymers, 2003;54:159-171.

  13. PROS AND CONS OF USING YEAST IN FOOD PRODUCTS (Saima Siddique) UG-3

  14. INTRODUCTION BAKER’S YEAST ALLERGIC REACTION TOUCHING OR INHALING YEAST SKIN OR RESPIRATORY SIDE EFFECTS The effects of yeast in the body are frequently related to having some type of persistent fungal infection. CANDIDA ALBICANS

  15. HEALTH BENEFITS OF YEAST IN FOOD NUTRITIONAL YEAST (18 amino acids) (15 minerals) Valuable and well known food supplement and healthy impact on the body

  16. The essential minerals and vitamins provided by nutritional yeast include: Managing stress level Vitamin B complex (Brewer’s yeast) Prevents pancreatic cancer Break down carbohydrates ,fats and proteins Healthy functioning of digestive and nervous system Important for strong and healthy hair Biotin, pantothenic acid, riboflavin, pyridoxine, thiamine, niacin and folic acid • Contributes to nail and growth and strength.

  17. Dealing with diabetes and low blood pressure. Knock down free radicals in body Development of nervous system in a growing fetus Chromium (GTF) Selenium Folic Acid and Fibre Be helpful in reducing the amount of fat Improves the elasticity of skin Rich source of fibre

  18. N U T R I T I O N A L Y E A S T Excellent alternate for dairy products Plays important role in regulating blood sugar • Beneficial for people having digestive issues and atherosclerosis Beneficial for vegetarian and people on low cholesterol diet Cures conditions like eczema and dermatitis

  19. BREWER’S YEAST NUTRITIONAL YEAST ACNE TREATMENT

  20. BREWER’S YEAST • Boosts the body’s immunity-INHIBITION OF CLOSTRIDIUM DIFFICILE • Improves body’s natural microbial balance • Build and repair tissues, bones, muscles and + help in hormone and enzyme production • Reducing and treating digestive problems • Prevents cancer • Protein found in brewer's yeast -human cell division

  21. DISADVANTAGES OF USING YEAST IN FOOD PRODUCTS Deplete vitamin B in the body B R E W E R’ S Y E A S T Increase the effects of diabetes medications Stomach discomfort, excess gas and bloating Irritable bowel disease Itching, Urticaria, and Quincke's edema Allergic reactions Tyramine-hypertensive crisis

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