ID 443 - Aminokwasy rozgałęzione

PL: Aminokwasy rozgałęzione
EN: Branched chain amino acids
Pdf: branched-chain amino acids

Oświadczenie (2)

1. Charakterystyka żywności / składnika

The food constituents that are the subjects of the health claims are proteinogenic branched-chain amino acids (BCAA), which are amino acids having aliphatic side-chains that are non-linear, i.e., leucine, isoleucine and valine. The content of BCAA in foods can be measured by established methods.
Leucine, isoleucine and valine are indispensable amino acids provided by mixed dietary protein intakes from different sources. A claim on protein and growth or maintenance of muscle mass has already been assessed with a favourable outcome (EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA), 2010).
BCAA can also be consumed as food supplements. Different mixtures are available in the market. From the references and conditions of use provided in relation to the health claims considered in this opinion, the Panel assumes that the food constituent under evaluation is BCAA consumed in addition to adequate protein intakes.
The Panel considers that the food constituent, branched chain amino acids, which is the subject of the health claims, is sufficiently characterised.

2.2. Tłumienie spadku siły mięśniowej następującego po wysiłku fizycznym na dużych wysokościach (ID 443)

The claimed effect is “attenuates the decline in power output following exercise at high altitude”. The Panel assumes that the target population is active individuals performing high altitude training.
Maintaining muscle power may be beneficial during every day life activities at high altitude, and is beneficial for athletic performance in disciplines where loss of muscle power reduces performance at high altitude.
The Panel considers that attenuation of the decline in muscle power following exercise at high altitude is a beneficial physiological effect.

3.2. Tłumienie spadku siły mięśniowej następującego po wysiłku fizycznym na dużych wysokościach (ID 443)

The scientific evidence provided in the consolidated list on the effects of branched chain amino acids on attenuation of the decline in muscle power following exercise at high altitude consisted of 18 references of which 16 were not pertinent to the claimed effect either because muscle power was not reported or exercise was not performed at high altitude. The Panel considers that no conclusions can be drawn from these references for the scientific substantiation of the claimed effect.
Two intervention studies investigated the effects of BCAA on muscle power during exercise performed at high altitude (Bigard et al., 1996; Schena et al., 1992). These studies have been described in detail in section 3.1.
In the study by Bigard et al. (1996), peak power output during an incremental bicycle exercise was tested, whereas in the study by Schena et al. (1992) lower limb muscle power estimated by repeated maximal jump during altitude acclimatisation (21-day trekking) was assessed. The Panel notes that the design of these small studies does not allow any conclusions to be drawn on the effects of BCAA independently of higher protein intakes and that direct comparisons between the intervention (BCAA) and control groups regarding the outcome variables were not reported. The Panel considers that no conclusions can be drawn from these studies for the scientific substantiation of the claimed effect.
The Panel concludes that a cause and effect relationship has not been established between the consumption of BCAA and attenuation of the decline in muscle power following exercise at high altitude.

Warunki i możliwe ograniczenia stosowania oświadczenia

11.5g per day