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Two related amino acids in one capsule. That is the idea behind this formula from NOW Foods. Each vegetarian capsule contains 500mg L-arginine and 250mg L-citrulline, both in free form. You take 2 per day, so a bottle of 120 capsules lasts two months. Interesting for athletes, but also for those who simply want to know more about these two building blocks.
Arginine is an amino acid that you get from high-protein food, such as meat, fish, nuts and legumes. Your body also produces it itself. Citrulline is a related amino acid that your kidneys can convert into arginine. That is why you often see the two together.
By the way, citrulline owes its name to the watermelon, in Latin Citrullus lanatus. It was first isolated from it in 1914, and watermelon is still one of the richest natural sources. Arginine, on the other hand, is found in large amounts in pumpkin seeds, peanuts, turkey and lentils. With a varied diet you therefore already get some of both. Your body also produces citrulline itself in the intestinal wall, from other amino acids such as glutamine. The difference with these capsules is mainly the amount and the timing: you know exactly how much you take, and you can take it separately from a meal.
This capsule combines both amino acids: 500mg L-arginine and 250mg L-citrulline per capsule. Citrulline is converted into arginine in your kidneys.
On the label, both amino acids are listed as 'free form'. This means that they occur freely, not bound in a protein chain as in a piece of meat. Your digestion therefore does not have to cut them out of a protein first. NOW Foods chooses pure amino acids here, without a salt form such as arginine-HCl or citrulline-malate. Because of this, 500mg on the label is really 500mg of arginine. Good to know: athletes often choose powders with a few grams per serving. These capsules are intended as a lower, daily intake that you can take without a shaker or measuring spoon.
Amino acids sound harmless, but these two affect your blood vessels. If you use blood pressure medication, nitrates or other heart medication, discuss it with your doctor first. The same applies to reduced kidney function, glaucoma or recurrent herpes, because arginine can play a role in this. For pregnant women and women who are breastfeeding, consultation is also wise. The product is only intended for adults.
A simple formula with two related amino acids in one capsule.
Two amino acids in a fixed ratio of 2:1. With 2 capsules per day, you get 1000mg arginine and 500mg citrulline.
Each capsule contains 500mg L-arginine and 250mg L-citrulline in free form.
No salt forms or protein chains, but free amino acids. The amount on the label is the amount of pure substance.
120 capsules at 2 per day. No measuring out powder, just a capsule with water.
* Percentage van de referentie inname volgens Verordening (EU) Nr. 1169/2011.
** Reference intake unknown.
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L-arginine is an amino acid that your body uses as a building block for proteins and as a precursor for nitric oxide, a signaling molecule in the walls of your blood vessels. It also plays a role in the urea cycle, through which your body eliminates nitrogen. Due to EU regulations, we cannot make any claims about its health effects.
The label recommends 1 capsule twice a day. You can split them between morning and afternoon.
They are two different amino acids. Citrulline is converted into arginine in your kidneys. NOW Foods combines them in this capsule.
Yes, sports powders often contain several grams per serving. These capsules are intended as a daily base of 1000mg arginine and 500mg citrulline. If you want more, then stick to the label and consult your doctor if you are taking medication.
Through your kidneys. There, citrulline is converted into arginine in two steps using the enzymes argininosuccinate synthetase and -lyase.
Citrulline malate is citrulline bound to malic acid, often in a 2:1 ratio. This means that one gram of citrulline malate contains less pure citrulline. These capsules contain L-citrulline in its free form, without malic acid.
