The Food and Drug Administration (FDA) said its action to repeal the use of lead acetate in hair dyes used on the scalp is “on hold while the agency responds to objections it has received on the October 2018 final rule.” According to FDA, the color additive petition process allows for a 30-day period for any person adversely affected to file an objection. Because FDA received an objection within this timeframe, under the law, the final rule is stayed pending final FDA action on the objections...