Cosmetics Formulation Development

I want to know what ingredients can be used directly on the skin, both on the face and body or can be used in 100% ratio? Thank you in advance

Hello, example: Pitera Aloe Vera Gel Stabilized Vitamin C (Natural-C Glycol™) Serum Vitamin CE Ferulic Lite Other items, check the web page by case that can be applied directly to the face, the usage rate must show "100%". In case the usage rate is lower than 100%, it means that the ingredient must be used in a diluted amount. Cannot be used directly on the skin.