Collocations for healthy - adj.

appear, be, be born, feel, look, seem
become
keep, remain, stay
make sb
Working in the open air has made him very healthy.

keep sb
Her good diet had kept her healthy.

consider sth
a new diet which is considered much healthier than previous ones

extremely, fairly, very, etc.
We have a very healthy diet.

completely (esp. AmE), perfectly
He's a perfectly healthy child.

reasonably
generally
apparently
The rare disorder strikes apparently healthy boys between the ages of five and twelve.

otherwise
She looked pale, but otherwise healthy.

mentally, physically

fit and healthy

be
remain

extremely, fairly, very, etc.
The economy is extremely healthy at the moment.

reasonably, relatively
basically, fundamentally, generally
financially

Healthy is used with these nouns:
alternative, appetite, attitude, baby, bacteria, balance, balance sheet, body, bone, breakfast, cell, competition, complexion, contempt, development, dialogue, diet, disrespect, distrust, donor, dose, eater, economy, ego, environment, exercise, expansion, fare, fat, finance, food, future, glow, growth, gut, habit, heart, helping, individual, infant, lead, life, lifestyle, liver, lunch, lung, meal, mix, nail, people, pregnancy, profit, recipe, relationship, respect, return, sale, scepticism, sign, situation, skin, snack, specimen, state, subject, substitute, tan, tissue, tooth, trend, volunteer, weight