{"id":1041688,"date":"2026-10-12T14:36:31","date_gmt":"2026-10-12T11:36:31","guid":{"rendered":"https:\/\/mstnutrition.ua\/?p=1041688"},"modified":"2026-10-12T16:11:31","modified_gmt":"2026-10-12T13:11:31","slug":"arginin-chy-tsytrulin-shho-krashhe-obraty-dlya-pampingu","status":"publish","type":"post","link":"https:\/\/mstnutrition.ua\/en\/arginin-chy-tsytrulin-shho-krashhe-obraty-dlya-pampingu\/","title":{"rendered":"Arginine or Citrulline: which is better for a pump?"},"content":{"rendered":"

Every athlete striving to achieve maximum results in the gym is well familiar with this feeling. Muscle fullness, prominent vascularity, a visual increase in muscle volume, and a powerful surge of energy during workouts\u2014these are all signs of a pump. But a pump is not just about physical appearance. Improved microcirculation means that muscle fibers receive more oxygen, amino acids, and essential nutrients right when they need them most.<\/p>\n

Among numerous sports supplements, two amino acids play a key role in achieving a pump\u2014L-arginine<\/a> and L-citrulline<\/a>. Choosing between them can be challenging, as both substances work through the same mechanism: stimulating nitric oxide (NO) production. So let’s take a closer look at their differences, how they affect the body, and which MST Nutrition product best fits your training program.<\/p>\n

Mechanism of Action: How Nitric Oxide Works<\/h2>\n

Nitric oxide (NO) acts as a natural molecular signal in the body, helping to relax vascular smooth muscle. This leads to blood vessel dilation, reduced vascular resistance, and a significant increase in blood flow.<\/p>\n

L-Arginine serves as a direct precursor to NO. Once inside the body, it takes part in nitric oxide synthesis via the NO synthase enzyme.<\/p>\n

L-Citrulline is an amino acid that is converted into L-arginine in the kidneys and liver, which then produces nitric oxide.<\/p>\n

At first glance, it might seem that arginine works faster and more effectively because it is a direct source. However, there are important biochemical nuances in the human body worth considering.<\/p>\n

MST L-Arginine: Fast Action and Direct Impact<\/h2>\n

The key feature of L-arginine is its rapid speed of action. Taken 20\u201330 minutes before a workout, it reaches peak blood concentrations right at the start of your exercises.<\/p>\n

Benefits of L-Arginine from MST Nutrition:<\/strong><\/p>\n