What dietary supplements do not need to be approved by the FDA before they are marketed to the public?

Dietary supplements do not require FDA approval before being marketed to the public, as they fall under the Dietary Supplement Health and Education Act (DSHEA) of 1994. This includes vitamins, minerals, herbs, amino acids, and other substances intended to supplement the diet. Manufacturers are responsible for ensuring the safety and labeling of their products, but the FDA only intervenes post-marketing if a product is found to be unsafe or misleading.