The health and human services secretary has elevated lightly regulated wellness companies and allowed advisers to keep investments, after vowing to end conflicts of interest.

Casey Means, a prominent nutrition advocate in the Make America Healthy Again movement, has been described as insufficiently critical of vaccines.

President Donald Trump’s move to nominate Dr. Casey Means as surgeon general is dividing the “Make America Healthy Again” movement, fomenting turmoil in the community that helped propel him to a second term.