J Nutr Health.  2023 Jun;56(3):330-347. 10.4163/jnh.2023.56.3.330.

Consumers’ perceptions of dietary supplements before and after the COVID-19 pandemic based on big data

• Lee E
• Jung HS
• Jang JA

• KMID: 2544288
• DOI: http://doi.org/10.4163/jnh.2023.56.3.330

Abstract

Purpose
This study identified words closely associated with the keyword “dietary supplement” (DS) using big data in Korean social media and investigated consumer perceptions and trends related to DSs before (2019) and after the coronavirus disease 2019 (COVID-19) pandemic (2021).
Methods
A total of 37,313 keywords were found for the 2019 period, and 35,336 keywords were found for the 2021 period using blogs and cafes on Daum and Naver. Results were derived by text mining, semantic networking, network visualization analysis, and sentiment analysis.
Results
The DS-related keywords that frequently appeared before and after COVID-19 were “recommend”, “vitamin”, “health”, “children”, “multiple”, and “lactobacillus”. “Calcium”, “lutein”, “skin”, and “immunity” also had high frequency-inverse document frequency (TF-IDF) values. These keywords imply a keen interest in DSs among Korean consumers. Big data results also reflected social phenomena related to DSs; for example, “baby” and “pregnant woman” had lower TD-IDF values after the pandemic, suggesting lower marriage and birth rates but higher values for “joint”, indicating reduced physical activity. A network centered on vitamins and health care was produced by semantic network analysis in 2019. In 2021, values were highest for deficiency and need, indicating that individuals were searching for DSs after the COVID-19 pandemic due to a lack an awareness of the need for adequate nutrient intake. Before the pandemic, DSs and vitamins were associated with healthcare and life cycle-related topics, such as pregnancy, but after the COVID-19 pandemic, consumer interests changed to disease prevention and treatment.
Conclusion
This study provides meaningful clues regarding consumer perceptions and trends related to DSs before and after the COVID-19 pandemic and fundamental data on the effect of the pandemic on consumer interest in dietary supplements.

Keyword

dietary supplement; social media; big data; COVID-19 pandemic