Funding for this research was provided by:
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
South Africa Netherlands research Programme on Alternatives in Development
South African Medical Research Council
South African National Research Foundation (NRF GUN numbers 2069139 and FA2006040700010; FA2007042600011)
North-West University, South Africa
Population Health Research Institute, Ontario
Received: 27 March 2020
Accepted: 10 June 2020
First Online: 16 June 2020
Ethics approval and consent to participate
: All participants gave written consent to participation and the study was approved by the Ethics Committee of the North-West University.
: Not applicable
: This research was supported in part by Upfield. AJW and PLZ are employed by Unilever, the Netherlands. Unilever is a producer of food consumer products. It divested its spreads business, which has operated since July 2018 under the name Upfield. JMG received financial support from Unilever for epidemiological studies of dietary and circulating fatty acids. The funders had no role in the design of the study, collection and analysis of data and decision to publish. No other potential conflicts of interest relevant to this article were reported.