Read the actual comparison
A 2020 study of 40 women compared 5% cysteamine with 4% hydroquinone for facial melasma. Both groups used tinted sunscreen. The study reported improvement in both groups, with greater changes on some measures in the hydroquinone group.[source]
This is more informative than a statement that an ingredient is clinically studied. It identifies who participated, what was compared and what accompanied treatment, while leaving the usual limits of a modest study intact.
The current retail formula is a different question
Cyspera Intensive’s current US page identifies 7% cysteamine and additional ingredients in a short-contact rinse-off cream. The cited 5% trial cannot be renamed a direct test of that current preparation.[source]
A higher listed concentration does not mathematically predict a larger response. A formula can also differ in base, additional actives and instructions, any of which complicates carrying a result across products.
Use the evidence to improve the consultation
For someone discussing a hydroquinone alternative, cysteamine research provides questions worth bringing to a dermatologist. Ask how the proposed product fits the diagnosis, tolerance history and other treatments.
Do not interpret hydroquinone-free as equivalent to risk-free. The product list and current instructions still matter, and pregnancy or ongoing skin disease requires specific advice. This review does not declare a universal winner or equate every cysteamine cream with every prescription option.
Sources & further reading
Provider pages establish what a brand markets. Clinical and regulatory sources establish the limits of the evidence. Each source has its own last-checked date below.
- Lima et al.: 5% cysteamine versus 4% hydroquinone2020 trial; 40 women; not a trial of the current 7% Cyspera Intensive formula · Checked October 8, 2026
- Cyspera: Intensive US product pageOfficial source; checked October 8, 2026 · Checked October 8, 2026