Según sea necesario is the best way to say "take as you need" in Spanish.
How to say "much needed" in spanish is muy necesaria hope that helped!
to say take in spanish i is tome pronnounced tom-ay
(Ella) necesitaba = She needed ('Ella' can be omitted if self-evident)
"I don't take ..." is "no tomo ..." in spanish.
Answer: Tomar
tomalo
Tómala
rentrez
(Yo) soy belleza The (yo) is not needed and is not used by many spanish speakers.
Yo Tomo
llévame contigo
Me retracto