What is the difference between Crystal Retinal and R-Retinoate?Updated 9 months ago

The core difference is the type of vitamin A used. 

Crystal Retinal, our iconic vitamin A night serum, contains retinAL; a next-generation vitamin A which acts 11x faster than standard retinOL [1], without any added irritation potential.  Crystal Retinal is for our results-driven customers looking for a targeted age-defying serum, those with blemish-prone skin and, of course, those already on the Crystal Retinal ladder, ranging from strengths 0.01% all the way to [0.2%]. 

R-Retinoate Intense is the jewel in the Medik8 vitamin A crown. Proven to be 8x stronger[2] and 11x faster^ than standard retinOL[1], this innovative vitamin A formula is powered by a revolutionary blend of retinal and encapsulated retinyl retinoate (exclusive to Medik8).  Combining 5 of Medik8's most advanced age-defying technologies in 1 extraordinary nighttime cream, r-Retinoate Intense delivers everything your skin needs for astonishing youth-renewing results in one simple but luxurious step.

[1] G. Siegenthaler et al., Retinol and retinal metabolism, Biochemical Journal, 1990, 268, pp 371-378
[2] H. Kim et al., Synthesis and in vitro biological activity of retinyl retinoate, a novel hybrid retinoid derivative, Bioorganic & Medicinal Chemistry, 2008, 15;16(12), pp 6387-93