Size and growth in 33 countries and regions, with clinical trials and research from public sources.
Active trials by country (ClinicalTrials.gov)
See every trial on ClinicalTrials.gov (opens in a new tab)"–" means we have no size for that place yet. 2033 values are projected from the 2023 size and the CAGR. Regions count only the countries we report on for trials.
| Place | Value | Year |
|---|---|---|
| World | 16.2 | 2024 |
| Australia | 30.6 | 2024 |
| Brazil | 30.1 | 2024 |
| Canada | 26.0 | 2024 |
| China | 9.3 | 2024 |
| Ecuador | 28.9 | 2024 |
| Egypt | 43.9 | 2024 |
| France | 11.2 | 2024 |
| Germany | 20.6 | 2024 |
| India | 8.0 | 2024 |
| Italy | 14.0 | 2024 |
| Japan | 5.9 | 2024 |
| Kenya | 11.3 | 2024 |
| Malaysia | 23.3 | 2024 |
| Mexico | 37.4 | 2024 |
| New Zealand | 34.0 | 2024 |
| Philippines | 9.6 | 2024 |
| Russia | 17.6 | 2024 |
| Saudi Arabia | 40.1 | 2024 |
| Singapore | 17.0 | 2024 |
| South Africa | 31.8 | 2024 |
| Spain | 15.3 | 2024 |
| Thailand | 16.4 | 2024 |
| UAE | 31.6 | 2024 |
| UK | 27.4 | 2024 |
| US | 41.0 | 2024 |
Ajinomoto Co Inc
Amway Corp
Glanbia PLC
GlaxoSmithKline PLC
Herbalife Nutrition Ltd
Kellogg Company
Kraft Heinz Company
Nestle
PepsiCo
ClinicalTrials.gov lists 144 active trials worldwide (recruiting, about to start or running), most of them in the US, as of 10 Nov 2026.
PubMed lists about 8,729 papers on the topic since 2021.
Sources: market size and growth: Acuitas Health Analytics research (2023 base year, forecasts to 2033). Trials: ClinicalTrials.gov. Research: PubMed (US National Library of Medicine). Patients: WHO Global Health Observatory. Fetched 10 Nov 2026. Trials and papers are found by search words, so counts are a guide.