Figure 3From: The acute effect of beta-guanidinopropionic acid versus creatine or placebo in healthy men (ABC Trial): study protocol for a randomized controlled trialTrial time line. Legend: The duration of the intervention is 7Â days. The trial supplements start at Day 1, after baseline measurements, inclusion, and randomization at Day 0 (baseline). After 24Â h and 7Â days of trial supplements, baseline measurements will be repeated, with the last visit at Day 21, to assess side effects.Back to article page