Corran Norman Stuart McLachlan (1 April 1944 – 9 August 2003) was a New Zealand research scientist and entrepreneur.
McLachlan is noted for his work on epidemiological research surrounding the effects of the A1 beta-casein.
He believed the existence of this protein in cows’ milk to be a public health issue contributing to both heart disease and type 1 diabetes.
In February 2000, McLachlan and his business partner, Howard Paterson, established A2 Corporation Limited (renamed The a2 Milk Company in April 2014) to market A2 cows’ milk, which was free from the A1 beta-casein.