Does creatine affect dopamine levels?
In healthy people, creatine has no demonstrable effect on dopamine in the blood. Positive signals so far come exclusively from mouse research.
In healthy people, creatine has no measurable effect on dopamine in the blood. In a randomised study, participants took five grams of creatine four times a day for seven days and were then kept awake for 24 hours. Blood dopamine levels rose in both groups, but that was due to the sleep deprivation, not the creatine. Creatine performed no better than placebo1.
In mouse studies the picture looks different. In mice exposed to a substance that damages the dopamine system, creatine protected against the loss of dopamine in a brain region that is central to Parkinson's disease. The loss of dopamine-producing nerve cells was also smaller in the creatine group. These are exclusively findings from animal research and have not yet been confirmed in humans2.
When creatine is combined with co-enzyme Q10, the same type of mouse research showed additional protection of the dopamine system. The accumulation of a harmful protein characteristic of Parkinson's disease was also reduced. Whether this additive effect is equally strong in humans is not yet known2.
Creatine has been studied in people with Parkinson's disease. A smaller phase II trial showed a positive signal on disease severity, but large phase III results were not yet available at the time of publication in 2011. Whether creatine genuinely influences dopamine in the human brain cannot be determined on the basis of current research2.
Four claims based on two unique sources: one randomised study in humans (PMID 16416332) and one review with mouse research on Parkinson's disease (PMID 21448659). The human data measure dopamine in the blood only, under conditions of sleep deprivation. There are no studies in humans that directly measure dopamine in the brain.
How does creatine improve mood and wellbeing?
Creatine does not demonstrably improve mood in healthy people without additional stressors; as a supplement during sleep deprivation, on a vegan diet, or as an addition to antidepressants there are early positive signals, but these are still too limited to recommend creatine as a mood-enhancing agent.
Does creatine also help with memory and concentration?
Creatine can improve your memory, but mainly if you are older, vegetarian, or your brain is under pressure. If you are a young, healthy meat-eater who sleeps well, the effect is small to negligible.
Does creatine supplementation reduce brain fog?
Creatine may relieve cognitive complaints, but the effect depends strongly on your situation: people with chronic fatigue, sleep deprivation or a plant-based diet are most likely to benefit, while it appears to do little for healthy, well-rested individuals.
Do ketone drinks do anything for your brain or performance?
For people with memory complaints the early signals are cautiously positive, but the studies are small and not conclusive. As a healthy athlete or average person, you have too little to go on to use ketone drinks with confidence.
Does creatine affect your sleep?
Creatine may improve how your sleep feels, but objective measurements show no effect. Do not use it primarily as a sleep aid; if you are already taking it for sport, you need not expect worse sleep.
Does creatine do anything to your immune system?
Creatine affects immune cells, but whether that turns out well or badly depends strongly on the situation. For healthy older adults who also do strength training there is a cautiously positive signal; if you have endometriosis or a certain type of cancer, the context is more complex and consulting your doctor is advisable.