R.K Phipps has written:

'The use of prolonged release bovine somatotropin in milk production' -- subject(s): Bovine somatotropin, Dairying

BST regulates both growth in mammals and involved in metabolism of nutrients.

Another name for growth hormone 1 is somatotropin.

rBGH, or recombinant Bovine Growth Hormone is a synthetic form of growth hormone injected into cows to increase growth rates and milk production. Manufactured by Monsanto, rBGH was introduced to the market in 1993 under the product name Posilac. rBGH is also referred to as rBST (recombinant Bovine Somatotropin).

Somatotropin is the same as growth hormone and it has a range of effects, including effects similar to insulin.