There are studies e.g. https://www.gov.uk/government/publications/sacn-iron-and-health-report https://www.gov.uk/government/publications/sacn-iron-and-hea... T

There are studies e.g. https://www.gov.uk/government/publications/sacn-iron-and-health-report https://www.gov.uk/government/publications/sacn-iron-and-hea... The vast majority of beef cattle in the UK are fed grass from pasture most of the year, then hay/silage over winter when there isn't much grass. The conclusion was the same; red meat isn't great for you, at least in significant quantities (90g+ a day).