In April 2007, Ofcom introduced broadcasting restrictions to reduce significantly the exposure of children to television advertising of foods high in fat, salt and sugar (HFSS). Also from August 2022 Amazon required all foods and drinks sold on their platform to be classified as Healthy/Unhealthy using the same rules.
The UK government’s Department for Health created a policy document on working out the Nutrional Profile score at https://www.gov.uk/government/publications/the-nutrient-profiling-model
Below is a link to a free Excel calculator of the NP score. This is for use at your own risk after determining if it suits your needs. Last updated on 23 July 2022. It works for individual calculations or upto 200 rows of data.
Further development of the calculator to work with your own data layout can be made by contacting me. I also help automate other aspects of Amazon / Ebay / Shopify listings.