| Lactose, a sugar present in milk, is one of simple sugars uesd in food preparations of infants. C.  "one of several simple sugars" "present" is fine here.  See this from M-W: Main Entry: 3pres·ent  Pronunciation: 'pre-z&nt
 Function: adjective
 Etymology: Middle English, from Old French, from Latin praesent-, praesens, from present participle of praeesse to be before one, from prae- pre- + esse to be -- more at IS
 1 : now existing or in progress
 2 a : being in view or at hand b : existing in something mentioned or under consideration
 3 : constituting the one actually involved, at hand, or being considered
 4 : of, relating to, or constituting a verb tense that is expressive of present time or the time of speaking
 5 obsolete : ATTENTIVE
 6 archaic : INSTANT, IMMEDIATE
 
 |