AFAs Are Not Photo-Sensitizing
No instance of photosensitization has been reported as a result of the use of AFAs. This may be due to the fact that some of the degradation bi-products of acidic amino acids in the skin, such as Urocanic Acid have long been recognized to be "Natural UV filters".
In summary, AFAs represent an entirely new and uniquely effective cosmeceutical. AFAs are represented at the high end of the cosmeceutical market, not necessarily a replacement for the workhorse cosmeceuticals your patients may have been using, but "a step up". With respect to moisture retention, decrease in photo-pigmentation, anti-oxidative effect, immediate results, low irritancy, and patient acceptance, AFAs certainly are a "step up" for your patients.