Mildy Shampoo is generally considered safe for use by teenagers, including a 14-year-old. Here are some key points to consider:

• Ingredients: Check the shampoo's ingredient list to ensure there are no known allergens or irritants specific to the individual.

• Skin Sensitivity: If the teenager has sensitive skin or scalp conditions like eczema or psoriasis, it’s best to consult a dermatologist before use.

• Usage: Use as directed on the packaging, avoiding contact with eyes.

• Patch Test: If uncertain, performing a small patch test on the skin can help identify any adverse reactions before full use.

If there are any concerns or if irritation occurs, discontinue use and seek advice from a dermatologist. Overall, Mildy Shampoo is typically safe for adolescents when used properly.