Привет!  Не совсем так,просто от 0.1% быстрее достигается результат и то в случае,если ваша кожа хорошо переносит такую высокую концентрацию.Both TGM (Tretinoin Gel Microspheres) 0.04% and TGM 0.1% were associated with reductions in lesion counts in these patients with mild to moderate facial acne. Both concentrations were generally well tolerated. The results suggested an early (week 2) incremental benefit for the use of TGM 0.1% in the treatment of inflammatory lesions.( Source: Berger R, Rizer R, Barba A, Wilson D, Stewart D, Grossman R, Nighland M, Weiss J., Clin Ther. 2007 Jun;29(6):1086-97)III. Forms and DosagePrescription cream and gel @ 0.01%, 0.025%, 0.05% concentration. GEL form penetrates the skin better and is more effective compared to creams but it can be more irriating. The best form of tretinoin is the microsphere cream which is a time released version of this acne medication. The microsphere cream is the least irritating form of tretinoin. Examples of tretinoin suspended in microsphere vehicle is Retin-A® Micro and Stieva-A cream. The topical liquid form is suspended into an alcoholic base which would be more irritating.http://www.acnetreatmentlab.com/retinoid-tretinoin-acne-treatment/