Common actives include fluoride compounds (stannous fluoride, sodium fluoride) and peroxide (hydrogen peroxide or similar) in whitening products. Botanical ingredients such as chamomile appear in some formulas. A few training or baby gels list no active ingredient.

Age ranges vary by product: some training gels and teething items are labeled for infants/toddlers (examples show 0–3 years or 2 months and up), many kids’ products are for ages 2 and up, some kits list 12 years and up, and several whitening or therapeutic gels are labeled for adults.

Kids’ options include natural banana-apple, fruity blends, and blue raspberry; adult products typically offer various mint or minty blends for whitening and preventive gels.

Warnings vary by product: many advise keeping the product out of reach of children and recommend adult supervision for young children (often under age 6). Some whitening/peroxide products are labeled for adult use only.

Included items vary: some training packs bundle a kid-sized toothbrush with the gel, whitening pens include a precision brush for application, and whitening kits may include syringes and an LED accelerator light.