The Claim
Creatine supplementation results in an increase of 1.8 kg of lean mass in trained lifters over a 6-week period.
What the research says
Challenges is higher
Challenge is ahead, but a single strong supporting 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.
Trained lifters who take creatine supplements gain exactly 1.8 kilograms of lean mass in six weeks.
See the scientific wording
Creatine supplementation helps trained lifters add 1.8 kg of lean mass over 6 weeks.
Creatine enters muscle cells and increases the amount of energy available during intense lifting, allowing more work to be done. This extra work swells the muscle cells with water, which turns on a signal that tells the muscle to build more protein. Over time, this leads to more muscle mass.
What the research says
3 studiesThe study found that women who took creatine and exercised didn't gain more muscle mass, even though they got a little stronger in their arms. So it doesn't support the idea that creatine helps lifters gain exactly 1.8 kg of muscle in six weeks.
The study found that creatine only makes muscles slightly thicker in some people—not enough to add nearly 2 kg of muscle in six weeks. Many people don’t even respond to it.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 3 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.