Words to Describe micronutrients

How micronutrients often is described ("________ micronutrients")

• macro
• secondary
• organic
• essential
• soluble
• necessary
• adequate
• certain
• deficient
• most
• select
• various
• many
• called
• supplemental
• extractable
• several
• specific
• chelated
• vital
• additional
• antioxidant
• fewer
• important
• appropriate
• enough
• sufficient
• metallic
• inorganic
• synergistic
• key
• protective
• scarce
• valuable
• available
• numerous
• dietary
• other
• individual
• multiple