'No Formaldehyde' ek ingredient nahi hai, yeh ek formulation claim hai jo batata hai ki product mein formaldehyde aur formaldehyde-releasing preservatives nahi hain. Iska use karke brands signal dete hain ki product contact sensitization ka risk kam karta hai. Sensitive skin wale logon ke liye achha hota hai kyunki formaldehyde irritation aur allergic reaction cause kar sakta hai.