There’s no strong scientific evidence that caffeine directly inhibits the absorption of creatine in the body. Some confusion arises from older studies suggesting caffeine might counteract creatine’s performance benefits. For example, a 1996 study found that caffeine could reduce the ergogenic effects of creatine during high-intensity exercise. However, this is likely due to caffeine’s diuretic effect or its interference with creatine’s role in muscle relaxation, not a direct impact on absorption. More recent research, including a 2011 review in the Journal of the International Society of Sports Nutrition, indicates that combining caffeine and creatine doesn’t significantly impair creatine uptake or storage in muscles.
All that said, taking creatine after training is probably the ideal time. Info HERE.