If you want to see the packaging in person or benefit from flexible return policies, specialized beauty retailers are the top choice.

: Offers a mix of "prestige" and "mass" brands. You can find everything from the medical-grade SkinCeuticals C E Ferulic to affordable favorites like La Roche-Posay and Mad Hippie .

For medical-grade or highly unstable formulas, professional online retailers often have stricter quality control for storage.

3. Drugstores & Affordable Retailers (Best for Budget & Convenience)

: A go-to for high-end and clinical brands like Drunk Elephant C-Firma Fresh and Ole Henriksen Banana Bright . Sephora is ideal for those who want to sample textures or consult with staff about their skin type.