natural
No, niacin is a natural vitamin found in many foods you eat.
Natural is to nature as artificial is to artifice.
The definitions is : Natural- A natural plant Artificial- An artificial one
Antonyms for "artificial" are genuine, real, and natural.
artificial
artificial can't be found in natural environment and are maken in labs
Natural silk is a proteinic fiber (sericin and fibroin).
Artificial. Man made.
artificial
Artificial is not natural, is man made.
Curium is an artificial element.
Natural