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.
Creatine is best known as a sports supplement, but the brain also consumes a great deal of energy. In older adults between the ages of 66 and 76, a clear positive effect on memory has been measured. In younger people (11 to 31 years old) who are well rested and not experiencing any particular stress, there is barely any difference compared with a placebo.
Your diet makes a big difference. Vegetarians and vegans get no creatine from food and therefore naturally have lower levels in their body and brain. They benefit far more from supplementation: a randomised study with vegetarian women (20 grams per day for five days) showed memory improvement, while in meat-eaters in the same study no effect was measurable.
The effect is also situation-dependent. When your brain is under pressure, due to sleep deprivation, low oxygen at high altitude, or cognitively demanding tasks, creatine shows a greater effect than under relaxed conditions. This aligns with the idea that creatine supports the brain's energy metabolism, and that this support only becomes noticeable when energy demand is high.
A practical point: to raise creatine levels in the brain by a measurable amount, higher doses or a longer supplementation period may be needed than what you would use for muscle performance. The exact optimal dosage for the brain has not yet been established.
Creatine is safe up to 20 grams per day in people with healthy kidneys. If you have a kidney condition, consult your doctor first. Short-term memory and reasoning appear to benefit the most; for attention and reaction time the results are mixed.
This answer is based on multiple randomised studies and two systematic reviews of those studies, including one that pooled eight such studies. The findings on older adults and vegetarians come from small but randomised trials. The evidence on stress situations (sleep deprivation, altitude) and brain creatine levels comes from review articles without pooling of raw data. The safety statements are well supported by multiple sources. The researchers emphasise that the optimal dosage for a cognitive effect has not yet been established, and that effects in young healthy people at rest are small or absent.
What does caffeine do to your memory and concentration in the long run?
Caffeine helps you stay more alert and focused when you are tired, but it does not make a well-rested brain smarter. If you want to get something out of it, use it when you are genuinely fatigued and keep the amount limited, especially as you get older.
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 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.
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.
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 help with weight loss?
Creatine does not make you lose weight, but it improves your body composition if you also train alongside it: slightly less fat, more muscle mass. Do not expect significant fat burning, but those who combine it with strength training get the most out of it.