Yes, NUTRITIONS is a Scrabble word!

Letter values in Scrabble US: N 1, U 1, T 1, R 1, I 1, T 1, I 1, O 1, N 1, S 1.

Is it a valid word?

NUTRITIONS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance
a source of materials to nourish the body
the scientific study of food and drink (especially in humans)