Answer: bvitamins

AnswerCrossword Clue
BVITAMINSBiotin, thiamine et al.
BVITAMINSNiacin and biotin
BVITAMINSNutrients in liver, milk, etc.
BVITAMINSThiamine and niacin e.g.
BVITAMINSNiacin and thiamine, for two