How many letters does the top answer for “a hormone produced by the anterior pituitary gland; promotes growth in humans” have?

The most common answer is somatotrophin (13 letters).

Crossword clue: a hormone produced by the anterior pituitary gland; promotes growth in humans

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

somatotrophin 13 letters wn-def

a hormone produced by the anterior pituitary gland; promotes growth in humans

somatotropin 12 letters wn-def

a hormone produced by the anterior pituitary gland; promotes growth in humans