I are Baboon,
here's a report I got from
www.creatine.com website. Take it for what it's worth.
A brewing controversy concerns how caffeine intake might affect creatine uptake. In one
study, Belgian scientists compared the effects of ingesting creatine (0.5 grams per 2.2 pounds
of body weight per day) vs. creatine plus caffeine (5 mg per 2.2 pounds of body weight per day) for six days. The amount of caffeine ingested equaled about 454 mg for a 200-pound individual.
An average cup of coffee has about 200 mg of caffeine, so this dosage is slightly more than two cups of coffee.
Levels of muscle PCr increased in both the creatine and creatine-plus-caffeine groups. Yet dynamic torque production (force applied to a joint, for example, isokinetic knee-extension exercises) improved by up to 23% in the creatine group but didn't change in the creatine-plus-caffeine group.
In this study, caffeine seemed to offset the ergogenic effects of creatine.
Yet many athletes regularly drink coffee or cola drinks containing caffeine and still acquire the benefits of creatine. It may not be necessary to eliminate that morning cup of coffee, at least
not yet.