The quality of protein supplements for sportspeople

September 25, 2018

Powdered protein supplements are one of the most commonly consumed nutritional supplements, whether by professional sportspeople or amateurs, even by those who use them for aesthetic purposes instead of sporting ones. This study, led by a researcher from the Area of Human Motility and Sporting Performance at the University of Seville, has analysed the quality of these products in function of their source, treatment and storage.

"During the preparation of powdered protein supplements, the thermal treatment involved can reduce the nutritional value of the product, an aspect that, until now, has received little research attention. Lysine, an amino acid involved in this reaction, is transformed into other compounds that are not biologically usable. In addition, according to the thermal treatment received, changes can be produced in the protein structure, which means that these supplements are less digestible for the body. Therefore, it was importance to investigate this matter deeply", explains the University of Seville teacher Antonio J. Sánchez.

The results indicate that half the supplements analysed contain more than 6% of blocked Lysine, but only 9% had a content of more than 20% of blocked lysine. In addition, the supplements with the highest concentrations of blocked lysine were hydrolysed and peptide serums (12%), while the lowest concentrations were registered by serum and casein isolates. The study also served to prove that the content of carbon hydrates as shown on the label could be an "indirect but useful" indication of the thermal damage done to milk serum supplements.

However, the experts indicate that, a priori, the consumption of protein supplements does not offer any health problems, provided that a product has complied with quality controls, is bought in a specialised and approved establishment and is made using the correct criteria. "There are increasingly more cases in which the consumption of supplements means, unknown to the consumer, the consumption of substances that can have adverse effects on their health. Therefore, nutritional evaluation must be the first step when advising sportspeople on diet strategies or the use of supplements", the researcher adds.

Nutritional evaluation must always be tailored to the individual and done by a professional who takes into account the person's detailed medical and nutritional history, evaluation of their diet, anthropometry, and analysis of their body and biochemical composition, before prescribing any supplement.

Real benefit for health and for sporting performance

According to the experts, the consumption of good quality protein supplements, as can be the case with an isolate of milk serum, can produce benefits for both health and sporting performance. There is scientific evidence that backs the idea that they can help to minimise the loss of muscle mass in old people or help those who practise sports in which strength is important to achieve an optimised level of muscle performance, for example.

This study was part of a multidisciplinary project, in which more than 5,000 individuals of different profiles participated: international sportspeople, whole national teams, amateur sportspeople, gym users, etc. "Knowing what use is made of these supplements can help us to understand the legal and educational needs in that regard, and improve the information we give to society".

This project had the collaboration of various Spanish, European and Latin-American universities.
-end-


University of Seville

Related Health Articles from Brightsurf:

The mental health impact of pandemics for front line health care staff
New research shows the impact that pandemics have on the mental health of front-line health care staff.

Modifiable health risks linked to more than $730 billion in US health care costs
Modifiable health risks, such as obesity, high blood pressure, and smoking, were linked to over $730 billion in health care spending in the US in 2016, according to a study published in The Lancet Public Health.

New measure of social determinants of health may improve cardiovascular health assessment
The authors of this study developed a single risk score derived from multiple social determinants of health that predicts county-level cardiovascular disease mortality.

BU study: High deductible health plans are widening racial health gaps
The growing Black Lives Matter movement has brought more attention to the myriad structures that reinforce racial inequities, in everything from policing to hiring to maternal mortality.

Electronic health information exchange improves public health disease reporting
Disease tracking is an important area of focus for health departments in the midst of the COVID-19 pandemic.

E-health resource improves men's health behaviours with or without fitness facilities
Men who regularly used a free web resource made significantly more health changes than men who did not, finds a new study from the University of British Columbia and Intensions Consulting.

Mental health outcomes among health care workers during COVID-19 pandemic in Italy
Symptoms of posttraumatic stress disorder, depression, anxiety and insomnia among health care workers in Italy during the COVID-19 pandemic are reported in this observational study.

Mental health of health care workers in china in hospitals with patients with COVID-19
This survey study of almost 1,300 health care workers in China at 34 hospitals equipped with fever clinics or wards for patients with COVID-19 reports on their mental health outcomes, including symptoms of depression, anxiety, insomnia and distress.

Health records pin broad set of health risks on genetic premutation
Researchers from the University of Wisconsin-Madison and Marshfield Clinic have found that there may be a much broader health risk to carriers of the FMR1 premutation, with potentially dozens of clinical conditions that can be ascribed directly to carrying it.

Attitudes about health affect how older adults engage with negative health news
To get older adults to pay attention to important health information, preface it with the good news about their health.

Read More: Health News and Health Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.