The Claim
Caffeine ingestion at a dose of 300 mg has no significant effect on core body temperature, skin temperature, mood, alertness, attention, or executive function in young, low-caffeine-consuming males during morning testing sessions.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In young men who rarely consume caffeine, taking 300 mg of caffeine in the morning does not change their body temperature, mood, alertness, attention, or ability to make decisions.
See the scientific wording
Caffeine ingestion (300 mg) does not significantly affect core body temperature, skin temperature, mood, alertness, or other cognitive domains (attention, executive function) in young, low-caffeine males during morning testing, indicating its effects are specific to neuromuscular and verbal memory outcomes.
Caffeine blocks a natural brain chemical that slows down nerve activity, which makes the brain send stronger signals to muscles and improves the ability to remember words. This happens without changing body temperature, mood, or general thinking skills.
What the research says
1 studyThis study found that drinking a strong cup of coffee in the morning doesn’t make young men feel more alert, warmer, or think better overall—but it does help them lift heavier weights and remember words better. So the claim is right: caffeine only boosts muscle and memory, not mood or focus.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.