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by Dr. Steve

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New! Dr. Steve

“This book has been written to provide an unbiased, comprehensive overview of the role that fats and
oils play in human health. There is now clear evidence that certain dietary fats and oils affect the
incidence of heart and artery disease, diabetes, and obesity.”

Achieve a healthy diet with The Diet Doctor software with nutrition information about calories, protein, food, vitamins and minerals.       Understanding Dietary Fats and Oils
   A Scientific Guide to their Health Effects
                 Dr. Steve Blake, ScD

         

           New in October 2009

        Free Download of the entire PDF book in exchange for your comments, suggestions, endorsement, or criticisms. My email address is on the bottom of each page to make it easy for you to give me your thoughts.

        Click HERE for the browser version of the book. You may use the search feature of your browser to find words or phrases (press ctrl-f for the search feature)

        Please see below for a detailed table of contents and a list of charts, figures, and graphs, with some samples.

         

        Table of contents

        Part I: From Seeds To Cells

          Chapter 1, What happened to our fats and oils? 18

          Chapter 2, Three Kinds of Fat: Triglycerides, Phospholipids, and Cholesterol 32

          Chapter 3, Digestion and transport of food fats 46

        Part II: Four Kinds of Fat

          Chapter 4, Saturated fats: the hard fats 59

          Chapter 5, Monounsaturated fats 80

          Chapter 6, Essential fats 92

          Chapter 7, Trans fatty acids: the bread and butter of disease 107

        Part III: Best Oils, Worst Fats

          Chapter 8, Comparing fats and oils 129

          Chapter 9, Comparing less common oils 148

          Chapter 10, Comparing the oils in food 162

        Part IV: Powerful balances

          Chapter 11, Eicosanoid precursors: how EPA is made 177

          Chapter 12, Eicosanoids: cellular activists 193

     

    Detailed Table of Contents

    Introduction           2

    Table of contents          3

    Detailed table of contents         4

    List of Charts           14

    List of Figures          15

    List of Graphs           16

    Part I: From Seeds To Cells

     Chapter 1  

     What happened to our fats and oils?       18   Summary          18

      The uses of fats and oils        18

      How oil used to be made        18

      Modern oil processing        19

       Changing the seeds        20

       Seeds that have not been genetically mutated    20

       Some genetically engineered oils      21

       Cold pressed oils       21

       Preparing the seeds, beans, or grains for processing  21

       Expeller pressed oils       21

       Hexane extraction of oils       22

       Oils not normally extracted with the solvent hexane   22

       Oils routinely extracted with the solvent hexane    23

       The loss of lecithin: degumming     24

       Caustic refining        24

       Bleaching of edible oils      25

       Nutrients eliminated during bleaching of oils   26

       Dewaxing        26

       Hydrogenation       26

       Winterization         28

       Deodorization or physical refining      28

       Vitamin E lost in oil processing      29

       Chemicals leaching into oils from bottles     30

       References         30

     Chapter 2

     Three Kinds of Fat: Triglycerides, Phospholipids, and Cholesterol   32

      Summary          32

      Triglycerides in food, in fat cells, and in blood    32

       Uses of triglycerides in the body     33

       The shape of triglycerides      33

       Digestion of triglycerides      36

       Health effects of excess triglycerides      37

      Phospholipids          37

       Phosphatidlinositol       40

       Phosphatidylserine       40

       Phosphatidylcholine        41

       Phosphatidylethanolamine       41

      Sphingolipids          41

      Cholesterol and other sterols      42

       Plant sterols         44

      References         45

     Chapter 3

     Digestion and Transport of Food Fats      46

      Summary          46

      Digestion of fats and oils       46

       Digestion of fats in the mouth and stomach    47

       Bile emulsifies fat       47

       Bitter tonics         48

       Digestion of fats and oils in the intestine     49

      Absorption of lipids         50

       Micelles        50

       Chylomicrons        50

      Lipoproteins: transport of lipids through the bloodstream    51

       Chylomicrons        51

       Very low density lipoproteins       52

       Vitamin E and lipoproteins      52

       VLDL becomes LDL        53

       LDL: Low density lipoproteins       53

       High density lipoproteins       54

       The ratio of total cholesterol to HDL     55

       Measuring total serum cholesterol     55

       Ratios of lipoproteins        56

      Metabolism of fats and oils        56

      References         58

    Part II: Four Kinds of Fat

     Chapter 4

     Saturated fats, the hard fats       59

      Summary          59

      Uses of saturated fats in our bodies       60

       How excess saturated fats increase blood cholesterol  60-61

       Saturated fats and disease      61

       Saturated fats and diabetes       62

      Saturated fats and blood cholesterol     62

      How much saturated fat is too much?      63

      Saturated fats made in the body      64

      Saturated fats in food       64

      Saturated fats in diets        68

       Atkin's diet        69

       American diet         70

       Mediterranean diet        71

       Vegetarian diet       72

       Whole food vegan diet       73

       Raw food diet high in fats from nuts and seeds    74

       Heart attack recovery diet      75

      Structure of saturated fats        75

       Length of saturated fatty acids     76

       Chart of saturated fatty acids       76

       The acid delta end and the methyl omega end   76

      References         78

     Chapter 5

     Monounsaturated Fats        80

      Summary          80

      Oleic acid         80

      Oleic acid in nuts and seeds graph       81

      Oleic acid in nuts in common oils graph      82

      Double bonds         82

      Omega-9 fatty acid         84

      Double bonds and oxidation       85

      Cis and trans configurations       85

      Biological importance of cis and trans bonds     86

      Common monounsaturated fatty acids     87

      Shorthand notation         88

      Other monounsaturated fatty acids      88

       Palmitoleic acid         88

       Petroselinic acid       88

       Gadoleic acid         89

       Cetoleic acid         89

       Erucic acid         89

       Nervonic acid         90

      Common and uncommon monounsaturated fatty acids (with chart) 90

      References         91

     Chapter 6

     Essential Fats          92

      Summary          92

      The meaning of essential       92

      Activation of essential fatty acids      93

      ALA and LA are needed inside our bodies      93

      Other long-chain polyunsaturated fatty acids     95

      Linoleic acid, the easy essential fatty acid     95

       Food sources of linoleic acid       96

       Linoleic acid in common diets     98

       The structure of linoleic acid      98

      Alpha-Linolenic acid, the hard-to-get essential fatty acid   99

       Food sources of ALA       100

       ALA in oils and fats        101

       ALA in some common diets      102

      Structure of ALA         103

      Why ALA and LA cannot be made in the body    104

      References         106

     Chapter 7

     Trans Fatty Acids: The Bread and Butter of Disease    107

      Summary          107

      Introduction         107

      Dietary sources of trans fatty acids       108

      Alternatives to partially hydrogenated oils      109

       Frying          109

       Snack foods         110

       Bakery products       110

      The risks of reducing trans fats       110

       Palm and other tropical oils      111

       Animal fats to replace hydrogenated oils    111

       Designer oils         111

      Choosing food low in trans fatty acids     111

       Worldwide variation in trans fatty acid intake    112

       Trans fats in food in America       113

       Labeling deceit       114

      Absorption and metabolism of trans fatty acids     114

      Heart disease and trans fatty acids      115

      Trans fats and blood lipids        115

      Diabetes and trans fatty acids       116

      Trans fatty acids in infants and children      117

      Trans fatty acids from dairy products and beef     117

      Structure of trans fatty acids       118

      Trans fatty acids in animal vs. vegetable fats     122

      Conjugated linoleic acid       123

      References         126

    Part III: Best Oils, Worst Fats

     Chapter 8

     Comparing fats and oils         129

      Summary          129

      What makes an oil or fat healthy?      129

       A nice balance of the essential fatty acids     130

       Oils need the protection of vitamin E     130

       Avoid trans fats        130

       Saturated fats        131

       Organic oils are healthier      132

       Processing can ruin a good oil      132

      Comparing fats and oils        132

       Butter          132

       Canola oil        133

       Cocoa butter        135

       Coconut oil         135

       Palm kernel oil       136

       Monolaurin and monocaprin       136

       Corn oil        137

       Cottonseed oil        138

       Flax oil        138

       Lard          139

       Olive oil         139

       Palm oil        140

       Peanut oil        141

       Safflower oil         142

       Sesame oil        142

       Soybean oil         143

       Sunflower oil         143

       Vegetable shortening        144

      Genetic alteration of oil seeds      145

       Mutagenic breeding        145

       Genetic engineering       146

      References         147

     Chapter 9

     Comparing Less Common Oils        148

      Summary          148

      Uncommon oils        148

       Almond oil        148

       Amaranth oil        149

       Apricot kernel oil        149

       Avocado oil         149

       Black currant oil       150

       Borage oil        150

       Candlenut oil         151

       Caraway oil         151

       Cashew oil        151

       Cherry oil        152

       Chia oil        152

       Evening primrose oil        153

       Gold of pleasure oil        153

       Grapeseed oil         154

       Hazelnut oil        154

       Hemp oil        155

       Honesty seed oil        155

       Macadamia nut oil       155

       Mango oil         155

       Marigold oil        155

       Nigella oil         156

       Niger oil         156

       Nutmeg butter         157

       Oat oil         157

       Passionfruit seed oil       158

       Perilla seed oil        158

       Pistachio nut oil       158

       Poppy seed oil        158

       Purslane seed oil       159

       Rice bran oil         159

       Shea butter         159

       Walnut oil        159

       Wheatgerm oil       160

       References         160

     Chapter 10

     Comparing the Oils in Food        162

      Summary          162

      Fats in food         162

      Nuts and Seeds         162

       Oleic acid in nuts and seeds      163

       Saturated fats in nuts and seeds      163

       Vitamin E in nuts and seeds       164

       Alpha-linolenic acid in nuts and seeds    165

       Linoleic acid in nuts and seeds     166

      Fatty acids in commonly selected food choices    167

       Total fat in food       168

       Saturated fat in food       169

       Cholesterol in common food selections     170

       Trans fats in selected foods      171

       Monounsaturated fats in selected food     172

       Linoleic acid in selected food sources    173

       Alpha-linolenic acid in selected food sources   174

       EPA and DHA in selected food sources    174

       Vitamin E in selected food sources      175

      References         176

    Part IV: Powerful balances

     Chapter 11

     Eicosanoid precursors: how EPA is made      177

      Summary          177

      How the essential fatty acids are elongated and desaturated  178

       Can our bodies make enough EPA or do we need to eat fish or fish oils?  179

       Dietary guidelines and intakes for EPA and ALA    180

      Competition for the desaturation enzymes     181

       The ratio of LA to ALA      182

      Hormones affect desaturation       184

      Nutrition and desaturation       185

       Other factors that affect desaturation    187

      Conversion of ALA to EPA, step by step     187

      Blood levels of EPA and arachidonic acid     190

      References         191

     Chapter 12

     Eicosanoids: cellular activists       193

      Summary          193

      Eicosanoid precursors        194

      Eicosanoids          194

      Eicosanoids in inflammation      195

      The eicosanoids        196

      Thromboxanes         196

       The Balance between series 2 and series 3 thromboxanes  197

       The biosynthesis of thromboxanes      198

      Leukotrienes           198

       Biosynthesis of Leukotrienes      199

       Asthma and leukotrienes       199

       Inflammation and leukotrienes     200

      Prostacyclins          201

       Blood clotting and prostacyclins      202

       Kidneys and prostacyclin      202

       Aspirin, Prostacyclin, and Thromboxane    203

      Prostaglandins         205

       Biosynthesis of prostaglandins      206

       Dietary fatty acids and prostaglandins    207

       Regulation of prostaglandins      207

      Prostaglandin E, PGE       208

       Inflammation and PGE      208

       Blood clotting and PGE      209

       Immune response and PGE       209

       Lungs and PGE       209

       Digestion and PGE       209

       Other effects of PGE        210

      Chart of eicosanoids         210

      Prostaglandin D, PGD       211

      Prostaglandin F, PGF2α       211

      Prostaglandin J, PGJ       212

       PGJ and tumors        212

      References         212

     

    Charts

     

    Some oils have not been genetically engineered or mutated    20

     Some genetically engineered oils        21

     Oils not normally extracted with the solvent hexane     22

     Oils routinely extracted with the solvent hexane      23

     Nutrients eliminated during bleaching of oils     26

     Hydrogenation changes melting temperatures      27

     Bitter tonics can stimulate bile after fatty meals      48

     The ratio of total cholesterol to HDL       55

     How Excess Saturated Fats Raise Blood Cholesterol     60

     Saturated fat chart         76

     Chart of monounsaturated fatty acids      91

     The importance of essential fatty acids and their derivatives   94

     Food sources of ALA         100

     Essential fatty acids in common diets, including added flaxseed   102

     Trans fat consumption from hydrogenation and ruminant sources   108

     Trans fatty acids in animal vs. vegetable fats      122

     Balancing the essential fatty acids in cooking oils      135

     Which is the best oil?          141

     Food serving size for comparison        168

     Essential fatty acids in common diets, including added flaxseed   184

     Types of eicosanoids          195

     Inflammation triggered by leukotrienes      200

     Prostacyclin functions        202

     Eicosanoid chart          210

     

    Figures

     Triglyceride 3D          34

     Trans-oleic acid, Stearic acid, and Oleic acid 3D     35

     Comparing triglycerides with saturated and unsaturated fats   35

     Triglycerides and phospholipids are similar       38

     The four types of phospholipids       39

     Phospholipids in cell membranes       40

     Sphingomyelin structure         42

     Cholesterol structure         43

     Stigmasterol structure          44

     Triglyceride 3D         47

     Triglyceride hydrolysis structure       49

     VLDL and LDL          53

     Metabolism of fat         57

     Stearic acid structure          77

     The structure of four common saturated fats       78

     Unsaturated and saturated bonds       83

     Oleic acid compared to stearic acid, 2D structures      84

     Oleic acid compared to stearic acid, 3D structures      85

     Structural differences between cis-oleic and trans-oleic acids    86

     Oleic acid compared to stearic acid and trans-oleic, 3D structures    85

     Petroselenic acid, a positional isomer of oleic acid      88

     Linoleic acid structure 2D        99

     ALA structure, 2D         104

     Delta-5 desaturase diagram in the last step of EPA biosynthesis   105

     Major sources of trans fats for American adults     113

     The structure of trans and cis bonds compared, 2D     120

     Elaidic and vaccenic trans fatty acid structures compared, 2D   121

     Oleic acid compared to stearic acid and trans-oleic, 3D structures    122

     Conjugated trans linoleic acid structure, 2D      124

     Omega-3 and omega-6 eicosanoid precursors     179

     Biosynthesis of eicosanoid precursors, simplified     181

     Effects of hormones on the desaturation of ALA      185

     Effects of nutrition on the desaturation of ALA     187

     The first step in creating EPA from ALA       188

     The second step in creating EPA from ALA      189

     The third step in creating EPA from ALA       190

     Biosynthesis of eicosanoids         197

     Biosynthesis of thromboxanes        198

     Biosynthesis of prostacyclin        201

     Aspirin, Prostacyclin, and Thromboxane      203

     Biosynthesis of prostaglandins        205

     Series 1, 2, and 3 prostaglandins       206

     

    Graphs

     Saturated fatty acid content of one serving of various foods   65

     The amount and variation of saturated fats in some common nuts and seeds  66

     Saturated fats in one serving of various common livestock products  67

     Saturated fats in one serving of common fats and oils     68

     Atkin's diet saturated fats         69

     Standard American diet saturated fats       70

     Mediterranean diet saturated fats       71

     Transition vegetarian diet saturated fats       72

     Whole food vegan diet saturated fats        73

     Raw food vegan diet saturated fats        74

     Heart attack recovery diet saturated fats       75

     Oleic acid in nuts and seeds        81

     Oleic acid in common oils         82

     Food sources of linoleic acid         96

     Linoleic acid in common oils        97

     ALA in common oils with LA/ALA ratios       101

     Saturated fats in common fats and oils      131

     ALA in common oils          134

     Vitamin E in common oils        137

     Oleic acid in some common oils        144

     Vitamin E in less common oils       150

     GLA in four oils          151

     Oleic acid in less common oils        153

     Linoleic acid in less common oils       154

     Saturated fatty acids in less common oils       157

     Percent of ALA in less common oils        158

     Oleic acid in nuts and seeds        163

     Saturated fat in one serving of nuts and seeds      164

     Vitamin E compared to daily need in nuts and seeds    165

     ALA in nuts and seeds         166

     Linoleic acid in nuts and seeds       167

     Total fat in one serving of selected food       169

     Saturated fat in one serving of selected food       170

     Dietary cholesterol in selected food        171

     Trans fatty acids in selected food        172

     Monounsaturated fats in selected food       172

     Linoleic acid in selected food        173

     ALA in selected food          174

     EPA and DHA in selected food        175

     Vitamin E in selected food        176

     ALA in common oils with LA/ALA ratios       183


     

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