Supplement use is popularity, not proof of gains

Regular supplement use was reported by 36.7% of 404 university students, and weight training was strongly associated with use. That is a finding about consumption patterns, not an estimate of how much a product improves muscle growth or a one-repetition maximum. The Nutrients paper, published on October 15, 2026, helps identify who uses supplements; it does not establish which products work.

Who answered the survey, and when?

Students at G. d’Annunzio University of Chieti-Pescara in Italy completed an online questionnaire between February and September 2023. Respondents had a mean age of 22.1 years, and 74.8% were female. The authors describe the sample as students enrolled in health-related courses. This is a particular university sample, not a prevalence estimate for all students or gym members. The publication date also should not be confused with the survey date: the reported behavior was collected in 2023, three years before publication.

What do prevalence and the odds ratio tell us?

An odds ratio is not a probability ratio. The multivariable estimate of 32.2 cannot be read as a claim that lifters need supplements 32 times more, or that using them improves performance by that factor. The confidence interval, from 9.36 to 111.2, is also wide, leaving considerable uncertainty about the association’s exact size. A cross-sectional questionnaire cannot establish whether training encouraged supplement use, use influenced training habits, or other factors contributed to both. No product was assigned and no training response was tested against a comparison treatment.

How should this change a fairlift training log?

1. Separate evidence that a product is widely used from evidence that it improves an outcome you care about.
2. Record load and repetitions for the same exercise in fairlift, checking that the conditions are comparable when reviewing earlier sessions.
3. If a record rises after a supplement change, consider concurrent changes in training volume, meals, and sleep before assigning a cause.

The Muscle Index calculator can compare big-three 1RM performance. A higher score, however, is not a controlled test of a supplement. The useful logging principle is to assess performance separately from what someone bought or consumed. Even a carefully kept personal record cannot remove every competing explanation for improvement. The energy drink and supplement percentages are separate survey results, too: adding them does not give a valid percentage of unique users, because the overlap is not supplied here.