I started training four years ago at the age of 36 and had very good skin despite a diet that included a fair amount of sugar and saturated fats.
My skin remained healthy and besides an occasional facial pimple, was clear.
About 16 months ago, I started supplementing with a creatine product (creatine pyruvate and monohydrate, beta-alanine, taurine and bioperine) and within a few weeks developed quite unpleasant acne, acute enough to actually be uncomfortable so I stopped taking the creatine but the acne remained at an uncomfortable level for about six months.
My personal hygiene has always been good and I upped it to include twice daily skin toners and regular exfoliating, etc. I improved my diet and cut out all sugars and reduced saturated fats to very low levels and upped fiber to epic levels and now have a very healthy diet.
Although my acne has improved, I still have persistent patches on the temples and occasional flare ups. I am convinced that it was the creatine supplement that I was taking that caused this reaction and I hope that my skin will return to normal eventually, though like I said, it has now been 16 months and I have worse skin now than when I was a teenager.
I would love to hear if there is a remedy for this, although somehow I doubt there is a quick fix. I would advise caution when taking this stuff and starting out on lower doses until you are certain that won't cause any untoward reactions.