U. Z. Mulla

Increased potassium intake from fruit and vegetables or supplements does not lower blood pressure or improve vascular function in UK men and women with early hypertension: a randomised controlled trial

T. Sanders, P. Chowienczyk, S. Berry, 2010, British Journal of Nutrition.

Urinary potassium excretion and plasma ascorbic acid concentration as biomarkers of increased intake of fruit and vegetable intake

T. Sanders, F. Kelly, S. Berry, 2005 .

Validation of the Oxford WebQ Online 24-Hour Dietary Questionnaire Using Biomarkers

P. Elliott, E. Riboli, T. Key, 2019, American journal of epidemiology.

Development of a UK Online 24-h Dietary Assessment Tool: myfood24

Laura J. Hardie, Janet E. Cade, Petra A. Wark, 2015, Nutrients.

Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews

P. Elliott, E. Riboli, D. Greenwood, 2018, BMC Medicine.

Adult macronutrient intake and physical capability in the MRC National Survey of Health and Development

D. Kuh, R. Cooper, G. Mishra, 2012, Age and ageing.