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Strong Support

Taking 6 grams of L-arginine might help young men use less oxygen when they exercise at a steady pace, which could mean their body works more efficiently.

39
Pro
0
Against

Evidence from Studies

Supporting (1)

39

Community contributions welcome

39

Acute L-arginine supplementation reduces the O2 cost of moderate-intensity exercise and enhances high-intensity exercise tolerance.

Randomized Controlled Trial
Human
2010 Nov

The study gave healthy young men 6 grams of L-arginine and found they used 7% less oxygen when exercising at a steady pace, meaning their bodies worked more efficiently — just like the claim says.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Acute L-arginine supplementation reduces the O2 cost of moderate-intensity exercise and enhances high-intensity exercise tolerance.

Score: 39
DOI: 10.1152/japplphysiol.00503.2010

Similar Assertions

Taking 6 grams of L-arginine might help young men exercise harder for longer before getting tired, by about a quarter more time than usual.

39
0
90%

Taking 6 grams of L-arginine might help young men exercise harder without getting as out of breath, because their bodies use oxygen more steadily during tough workouts.

39
0
88%

Taking arginine supplements for just three days won’t make you stronger or more powerful during short, intense workouts like sprinting or lifting heavy weights—even if you’re already a well-trained athlete.

46
0
80%

Taking a daily L-arginine supplement for two weeks doesn't help lower ammonia levels in the blood when healthy young men cycle hard, because the supplement group and the placebo group ended up with pretty much the same ammonia levels.

60
0
78%

Taking a specific amino acid supplement called L-arginine every day for three weeks might make people feel less tired when they exercise, after having a heart attack and while doing heart rehab — compared to taking a sugar pill.

49
0
77%