Opening book details…
Can I read Pre‐workout supplements marketed in Brazil: Caffeine quantification and caffeine daily intake assessment on EtoBox?
Pre‐workout supplements marketed in Brazil: Caffeine quantification and caffeine daily intake assessment by Bruno Ruiz Brandão da Costa; Lohanna Pereira El Haddad; Bruno Toledo Freitas; Pablo Alves Marinho; Bruno Spinosa De Martinis is a Medicine article available to read on EtoBox.
What is Pre‐workout supplements marketed in Brazil: Caffeine quantification and caffeine daily intake assessment about?
The stimulating and performance-enhancing properties of caffeine are often explored in one the most consumed types of supplements: the pre-workout supplements (PWS). However, despite the popularity of PWS, previous studies have reported incompatibilities between what is described in their labels and their actual caffeine content. This study aimed to develop, to optimize, and to validate a gaschromatography coupled to nitrogen-phosphorus detector (GC-NPD) method to quantify caffeine in PWS and to analyze commercial PWS marketed in Brazil to estimate the caffeine daily intake. For this purpose, three different extraction procedures were evaluated: agitation in vortex, shaker, and sonication. Sonication yielded the best extraction results. Next, the parameters' temperature and time were optimized by using central composite rotatable design (CCRD) and response surface methodology, which revealed the optimal values of 70 C and 10 min. The method was validated and applied to quantify caffeine in 52 PWS. From the 36 PWS labels that specified the caffeine amount, seven (19%) presented more than 120% of the declared quantity, whereas 15 (42%) contained less than 80% of the labeled caffeine.
Who reads Pre‐workout supplements marketed in Brazil: Caffeine quantification and caffeine daily intake assessment?
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- Bruno Ruiz Brandão da Costa; Lohanna Pereira El Haddad; Bruno Toledo Freitas; Pablo Alves Marinho; Bruno Spinosa De Martinis
- Publisher
- Wiley
- Published
- 2021
- Language
- EN
- Field
- Medicine (Life Sciences)