The purpose of this study is to To study the blood bioavailability of a sustained-release β-alanine granulated supplement of two different doses (10 g and 20 g).

Subjects will consume 10 g of β-alanine one day by 4 ingestions of 2.5 g separated by 1 hour and 15 min. While on another day 20 g of β-alanine by 4 ingestions of 5 g separated by 1 hour and 15 minutes, with a washout period of 15 days between the two doses. Subsequently, the amino acid levels in blood will be analyzed after the product intake and during a period of 8 hours.

Each day of visit the paresthesias (moment of appearance, intensity and sensations) will be studied at different times.

Inclusion Criteria:

• Men between 18 and 60 years old.
• Cyclists with more than two years of cycling experience.
• Bicycle training at least twice a week.

Exclusion Criteria:

• Suffer a lasting injury that prevents you from training in the month prior to surgery.
• Subjects with a chronic illness.
• Having consumed in the three months prior to the start of the study any β-alanine supplement.
• Making changes in diet or exercise during the study.
• Inability to understand the informed consent form.
• Consumption of other supplements that could alter the results of the study.