2023-2028 Global and Regional Weight Loss and Diet Management Products and Services Industry Status and Prospects Professional Market Research Report Standard Version

Chapter 1 Industry Overview
1.1 Definition
1.2 Assumptions
1.3 Research Scope
1.4 Market Analysis by Regions
1.4.1 North America Market States and Outlook (2023-2028)
1.4.2 East Asia Market States and Outlook (2023-2028)
1.4.3 Europe Market States and Outlook (2023-2028)
1.4.4 South Asia Market States and Outlook (2023-2028)
1.4.5 Southeast Asia Market States and Outlook (2023-2028)
1.4.6 Middle East Market States and Outlook (2023-2028)
1.4.7 Africa Market States and Outlook (2023-2028)
1.4.8 Oceania Market States and Outlook (2023-2028)
1.4.9 South America Market States and Outlook (2023-2028)
1.5 Global Weight Loss and Diet Management Products and Services Market Size Analysis from 2023 to 2028
1.5.1 Global Weight Loss and Diet Management Products and Services Market Size Analysis from 2023 to 2028 by Consumption Volume
1.5.2 Global Weight Loss and Diet Management Products and Services Market Size Analysis from 2023 to 2028 by Value
1.5.3 Global Weight Loss and Diet Management Products and Services Price Trends Analysis from 2023 to 2028
1.6 COVID-19 Outbreak: Weight Loss and Diet Management Products and Services Industry Impact
Chapter 2 Global Weight Loss and Diet Management Products and Services Competition by Types, Applications, and Top Regions and Countries
2.1 Global Weight Loss and Diet Management Products and Services (Volume and Value) by Type
2.1.1 Global Weight Loss and Diet Management Products and Services Consumption and Market Share by Type (2017-2022)
2.1.2 Global Weight Loss and Diet Management Products and Services Revenue and Market Share by Type (2017-2022)
2.2 Global Weight Loss and Diet Management Products and Services (Volume and Value) by Application
2.2.1 Global Weight Loss and Diet Management Products and Services Consumption and Market Share by Application (2017-2022)
2.2.2 Global Weight Loss and Diet Management Products and Services Revenue and Market Share by Application (2017-2022)
2.3 Global Weight Loss and Diet Management Products and Services (Volume and Value) by Regions
2.3.1 Global Weight Loss and Diet Management Products and Services Consumption and Market Share by Regions (2017-2022)
2.3.2 Global Weight Loss and Diet Management Products and Services Revenue and Market Share by Regions (2017-2022)
Chapter 3 Production Market Analysis
3.1 Global Production Market Analysis
3.1.1 2017-2022 Global Capacity, Production, Capacity Utilization Rate, Ex-Factory Price, Revenue, Cost, Gross and Gross Margin Analysis
3.1.2 2017-2022 Major Manufacturers Performance and Market Share
3.2 Regional Production Market Analysis
3.2.1 2017-2022 Regional Market Performance and Market Share
3.2.2 North America Market
3.2.3 East Asia Market
3.2.4 Europe Market
3.2.5 South Asia Market
3.2.6 Southeast Asia Market
3.2.7 Middle East Market
3.2.8 Africa Market
3.2.9 Oceania Market
3.2.10 South America Market
3.2.11 Rest of the World Market
Chapter 4 Global Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import by Regions (2017-2022)
4.1 Global Weight Loss and Diet Management Products and Services Consumption by Regions (2017-2022)
4.2 North America Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.3 East Asia Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.4 Europe Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.5 South Asia Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.6 Southeast Asia Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.7 Middle East Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.8 Africa Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.9 Oceania Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
4.10 South America Weight Loss and Diet Management Products and Services Sales, Consumption, Export, Import (2017-2022)
Chapter 5 North America Weight Loss and Diet Management Products and Services Market Analysis
5.1 North America Weight Loss and Diet Management Products and Services Consumption and Value Analysis
5.1.1 North America Weight Loss and Diet Management Products and Services Market Under COVID-19
5.2 North America Weight Loss and Diet Management Products and Services Consumption Volume by Types
5.3 North America Weight Loss and Diet Management Products and Services Consumption Structure by Application
5.4 North America Weight Loss and Diet Management Products and Services Consumption by Top Countries
5.4.1 United States Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
5.4.2 Canada Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
5.4.3 Mexico Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 6 East Asia Weight Loss and Diet Management Products and Services Market Analysis
6.1 East Asia Weight Loss and Diet Management Products and Services Consumption and Value Analysis
6.1.1 East Asia Weight Loss and Diet Management Products and Services Market Under COVID-19
6.2 East Asia Weight Loss and Diet Management Products and Services Consumption Volume by Types
6.3 East Asia Weight Loss and Diet Management Products and Services Consumption Structure by Application
6.4 East Asia Weight Loss and Diet Management Products and Services Consumption by Top Countries
6.4.1 China Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
6.4.2 Japan Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
6.4.3 South Korea Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 7 Europe Weight Loss and Diet Management Products and Services Market Analysis
7.1 Europe Weight Loss and Diet Management Products and Services Consumption and Value Analysis
7.1.1 Europe Weight Loss and Diet Management Products and Services Market Under COVID-19
7.2 Europe Weight Loss and Diet Management Products and Services Consumption Volume by Types
7.3 Europe Weight Loss and Diet Management Products and Services Consumption Structure by Application
7.4 Europe Weight Loss and Diet Management Products and Services Consumption by Top Countries
7.4.1 Germany Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.2 UK Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.3 France Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.4 Italy Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.5 Russia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.6 Spain Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.7 Netherlands Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.8 Switzerland Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
7.4.9 Poland Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 8 South Asia Weight Loss and Diet Management Products and Services Market Analysis
8.1 South Asia Weight Loss and Diet Management Products and Services Consumption and Value Analysis
8.1.1 South Asia Weight Loss and Diet Management Products and Services Market Under COVID-19
8.2 South Asia Weight Loss and Diet Management Products and Services Consumption Volume by Types
8.3 South Asia Weight Loss and Diet Management Products and Services Consumption Structure by Application
8.4 South Asia Weight Loss and Diet Management Products and Services Consumption by Top Countries
8.4.1 India Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
8.4.2 Pakistan Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
8.4.3 Bangladesh Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 9 Southeast Asia Weight Loss and Diet Management Products and Services Market Analysis
9.1 Southeast Asia Weight Loss and Diet Management Products and Services Consumption and Value Analysis
9.1.1 Southeast Asia Weight Loss and Diet Management Products and Services Market Under COVID-19
9.2 Southeast Asia Weight Loss and Diet Management Products and Services Consumption Volume by Types
9.3 Southeast Asia Weight Loss and Diet Management Products and Services Consumption Structure by Application
9.4 Southeast Asia Weight Loss and Diet Management Products and Services Consumption by Top Countries
9.4.1 Indonesia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.2 Thailand Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.3 Singapore Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.4 Malaysia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.5 Philippines Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.6 Vietnam Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
9.4.7 Myanmar Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 10 Middle East Weight Loss and Diet Management Products and Services Market Analysis
10.1 Middle East Weight Loss and Diet Management Products and Services Consumption and Value Analysis
10.1.1 Middle East Weight Loss and Diet Management Products and Services Market Under COVID-19
10.2 Middle East Weight Loss and Diet Management Products and Services Consumption Volume by Types
10.3 Middle East Weight Loss and Diet Management Products and Services Consumption Structure by Application
10.4 Middle East Weight Loss and Diet Management Products and Services Consumption by Top Countries
10.4.1 Turkey Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.2 Saudi Arabia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.3 Iran Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.4 United Arab Emirates Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.5 Israel Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.6 Iraq Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.7 Qatar Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.8 Kuwait Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
10.4.9 Oman Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 11 Africa Weight Loss and Diet Management Products and Services Market Analysis
11.1 Africa Weight Loss and Diet Management Products and Services Consumption and Value Analysis
11.1.1 Africa Weight Loss and Diet Management Products and Services Market Under COVID-19
11.2 Africa Weight Loss and Diet Management Products and Services Consumption Volume by Types
11.3 Africa Weight Loss and Diet Management Products and Services Consumption Structure by Application
11.4 Africa Weight Loss and Diet Management Products and Services Consumption by Top Countries
11.4.1 Nigeria Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
11.4.2 South Africa Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
11.4.3 Egypt Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
11.4.4 Algeria Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
11.4.5 Morocco Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 12 Oceania Weight Loss and Diet Management Products and Services Market Analysis
12.1 Oceania Weight Loss and Diet Management Products and Services Consumption and Value Analysis
12.2 Oceania Weight Loss and Diet Management Products and Services Consumption Volume by Types
12.3 Oceania Weight Loss and Diet Management Products and Services Consumption Structure by Application
12.4 Oceania Weight Loss and Diet Management Products and Services Consumption by Top Countries
12.4.1 Australia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
12.4.2 New Zealand Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 13 South America Weight Loss and Diet Management Products and Services Market Analysis
13.1 South America Weight Loss and Diet Management Products and Services Consumption and Value Analysis
13.1.1 South America Weight Loss and Diet Management Products and Services Market Under COVID-19
13.2 South America Weight Loss and Diet Management Products and Services Consumption Volume by Types
13.3 South America Weight Loss and Diet Management Products and Services Consumption Structure by Application
13.4 South America Weight Loss and Diet Management Products and Services Consumption Volume by Major Countries
13.4.1 Brazil Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.2 Argentina Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.3 Columbia Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.4 Chile Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.5 Venezuela Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.6 Peru Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.7 Puerto Rico Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
13.4.8 Ecuador Weight Loss and Diet Management Products and Services Consumption Volume from 2017 to 2022
Chapter 14 Company Profiles and Key Figures in Weight Loss and Diet Management Products and Services Business
14.1 AHD International
14.1.1 AHD International Company Profile
14.1.2 AHD International Weight Loss and Diet Management Products and Services Product Specification
14.1.3 AHD International Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.2 Atkins Nutritionals
14.2.1 Atkins Nutritionals Company Profile
14.2.2 Atkins Nutritionals Weight Loss and Diet Management Products and Services Product Specification
14.2.3 Atkins Nutritionals Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.3 Bio-Synergy
14.3.1 Bio-Synergy Company Profile
14.3.2 Bio-Synergy Weight Loss and Diet Management Products and Services Product Specification
14.3.3 Bio-Synergy Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.4 Body-Solid
14.4.1 Body-Solid Company Profile
14.4.2 Body-Solid Weight Loss and Diet Management Products and Services Product Specification
14.4.3 Body-Solid Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.5 Brunswick
14.5.1 Brunswick Company Profile
14.5.2 Brunswick Weight Loss and Diet Management Products and Services Product Specification
14.5.3 Brunswick Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.6 Conagra Foods
14.6.1 Conagra Foods Company Profile
14.6.2 Conagra Foods Weight Loss and Diet Management Products and Services Product Specification
14.6.3 Conagra Foods Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.7 Glaxosmithkline
14.7.1 Glaxosmithkline Company Profile
14.7.2 Glaxosmithkline Weight Loss and Diet Management Products and Services Product Specification
14.7.3 Glaxosmithkline Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.8 Kellogg
14.8.1 Kellogg Company Profile
14.8.2 Kellogg Weight Loss and Diet Management Products and Services Product Specification
14.8.3 Kellogg Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.9 Kraft Foods
14.9.1 Kraft Foods Company Profile
14.9.2 Kraft Foods Weight Loss and Diet Management Products and Services Product Specification
14.9.3 Kraft Foods Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.10 Medifast
14.10.1 Medifast Company Profile
14.10.2 Medifast Weight Loss and Diet Management Products and Services Product Specification
14.10.3 Medifast Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.11 Nautilus
14.11.1 Nautilus Company Profile
14.11.2 Nautilus Weight Loss and Diet Management Products and Services Product Specification
14.11.3 Nautilus Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.12 Nestle
14.12.1 Nestle Company Profile
14.12.2 Nestle Weight Loss and Diet Management Products and Services Product Specification
14.12.3 Nestle Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.13 Nutrasweet
14.13.1 Nutrasweet Company Profile
14.13.2 Nutrasweet Weight Loss and Diet Management Products and Services Product Specification
14.13.3 Nutrasweet Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.14 Nutrisystem
14.14.1 Nutrisystem Company Profile
14.14.2 Nutrisystem Weight Loss and Diet Management Products and Services Product Specification
14.14.3 Nutrisystem Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.15 Pepsico
14.15.1 Pepsico Company Profile
14.15.2 Pepsico Weight Loss and Diet Management Products and Services Product Specification
14.15.3 Pepsico Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.16 Quaker Oats
14.16.1 Quaker Oats Company Profile
14.16.2 Quaker Oats Weight Loss and Diet Management Products and Services Product Specification
14.16.3 Quaker Oats Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.17 Skinny Nutritional
14.17.1 Skinny Nutritional Company Profile
14.17.2 Skinny Nutritional Weight Loss and Diet Management Products and Services Product Specification
14.17.3 Skinny Nutritional Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.18 Streamline Foods
14.18.1 Streamline Foods Company Profile
14.18.2 Streamline Foods Weight Loss and Diet Management Products and Services Product Specification
14.18.3 Streamline Foods Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.19 Tate And Lyle
14.19.1 Tate And Lyle Company Profile
14.19.2 Tate And Lyle Weight Loss and Diet Management Products and Services Product Specification
14.19.3 Tate And Lyle Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.20 Coca-Cola
14.20.1 Coca-Cola Company Profile
14.20.2 Coca-Cola Weight Loss and Diet Management Products and Services Product Specification
14.20.3 Coca-Cola Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.21 Hershey
14.21.1 Hershey Company Profile
14.21.2 Hershey Weight Loss and Diet Management Products and Services Product Specification
14.21.3 Hershey Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.22 Unilever
14.22.1 Unilever Company Profile
14.22.2 Unilever Weight Loss and Diet Management Products and Services Product Specification
14.22.3 Unilever Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.23 Vivus
14.23.1 Vivus Company Profile
14.23.2 Vivus Weight Loss and Diet Management Products and Services Product Specification
14.23.3 Vivus Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.24 Vlcc Group
14.24.1 Vlcc Group Company Profile
14.24.2 Vlcc Group Weight Loss and Diet Management Products and Services Product Specification
14.24.3 Vlcc Group Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.25 Weight Watcher
14.25.1 Weight Watcher Company Profile
14.25.2 Weight Watcher Weight Loss and Diet Management Products and Services Product Specification
14.25.3 Weight Watcher Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
14.26 Wellness International
14.26.1 Wellness International Company Profile
14.26.2 Wellness International Weight Loss and Diet Management Products and Services Product Specification
14.26.3 Wellness International Weight Loss and Diet Management Products and Services Production Capacity, Revenue, Price and Gross Margin (2017-2022)
Chapter 15 Global Weight Loss and Diet Management Products and Services Market Forecast (2023-2028)
15.1 Global Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Price Forecast (2023-2028)
15.1.1 Global Weight Loss and Diet Management Products and Services Consumption Volume and Growth Rate Forecast (2023-2028)
15.1.2 Global Weight Loss and Diet Management Products and Services Value and Growth Rate Forecast (2023-2028)
15.2 Global Weight Loss and Diet Management Products and Services Consumption Volume, Value and Growth Rate Forecast by Region (2023-2028)
15.2.1 Global Weight Loss and Diet Management Products and Services Consumption Volume and Growth Rate Forecast by Regions (2023-2028)
15.2.2 Global Weight Loss and Diet Management Products and Services Value and Growth Rate Forecast by Regions (2023-2028)
15.2.3 North America Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.4 East Asia Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.5 Europe Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.6 South Asia Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.7 Southeast Asia Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.8 Middle East Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.9 Africa Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.10 Oceania Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.2.11 South America Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Growth Rate Forecast (2023-2028)
15.3 Global Weight Loss and Diet Management Products and Services Consumption Volume, Revenue and Price Forecast by Type (2023-2028)
15.3.1 Global Weight Loss and Diet Management Products and Services Consumption Forecast by Type (2023-2028)
15.3.2 Global Weight Loss and Diet Management Products and Services Revenue Forecast by Type (2023-2028)
15.3.3 Global Weight Loss and Diet Management Products and Services Price Forecast by Type (2023-2028)
15.4 Global Weight Loss and Diet Management Products and Services Consumption Volume Forecast by Application (2023-2028)
15.5 Weight Loss and Diet Management Products and Services Market Forecast Under COVID-19
Chapter 16 Conclusions
Research Methodology