Not necessarily - these represent two different philosophies rather than a clearly 'better' and 'worse' option. The 2:1:1 ratio is the standard ratio used in the original studies on muscle metabolism, while 4:1:1 and similar formulas emphasize a higher proportion of leucine, which according to some more recent studies (Martinho et al., 2022) is physiologically more important for triggering anabolic signaling pathways. There is currently not enough solid evidence that either variant is clearly more effective in practice for reducing muscle soreness - both ratios have shown benefits in the studies used. The choice is therefore more a matter of personal preference than a scientifically established superiority of one option.

The 'Cologne list' most likely refers to the Kölner Liste, a German database used by athletes and clubs to check whether products or product batches are free of substances banned under the World Anti-Doping Agency (WADA) list. Inclusion on such a list is a positive signal, as it indicates additional screening of the product for banned substances, which is particularly important for competitive athletes subject to doping controls. However, based on publicly available data on this product, it is not entirely clear whether this refers to ongoing, batch-specific testing or a more general brand listing - for competitive athletes, we recommend checking the current status of the product directly with the manufacturer or on the Kölner Liste before use.

If your total daily protein intake (including all essential amino acids) is already sufficient relative to your body weight and activity level, the additional benefit of standalone BCAA supplementation for building or maintaining muscle is limited - Wolfe (2017) showed that BCAAs without the remaining essential amino acids do not stimulate muscle protein synthesis. Where BCAA supplementation still makes sense even with sufficient protein intake, it is primarily as support for reducing muscle soreness and markers of damage after particularly intense or unaccustomed training (Khemtong et al., 2021), for example when changing your training program or after a long break.

In healthy adults, free crystalline BCAAs within the recommended dose (5 g, 2-4 times daily) are generally safe for daily use, but you should still not exceed the recommended amount. The product contains the artificial sweetener sucralose, which may cause mild bloating in individuals with a very sensitive digestive tract, as well as traces of milk, soy, eggs and gluten, which is important for those with allergies. We recommend that individuals with maple syrup urine disease (MSUD) or advanced liver disease, as well as pregnant and breastfeeding women, consult a doctor before regular use.