What is L-Citrulline?
L-Citrulline is an amino acid that was first identified in watermelon, which is how it got its name (the Latin word for watermelon is citrullus). Your body also makes it naturally.
Its connection to circulation support comes from what happens next. The body can convert L-Citrulline into L-Arginine, and L-Arginine is a starting material for nitric oxide. That is why citrulline and arginine are so often paired in formulas built around nitric oxide support.
If you are curious about foods, the USDA FoodData Central database is a handy tool for exploring what is in your favorite fruits and vegetables.
Form 1: L-Citrulline HCl
The "HCl" in L-Citrulline HCl stands for hydrochloride. In this form, citrulline is bonded to hydrochloric acid, which creates a stable ingredient that dissolves easily.
People like HCl forms for their clean, straightforward profile. It is simply citrulline, delivered in a form that is easy to work into a capsule.
In PressPril, L-Citrulline HCl sits alongside the other named ingredients to support the nitric oxide pathway as part of your daily routine.
Form 2: L-Citrulline Malate
L-Citrulline Malate pairs citrulline with malic acid. Malic acid is a compound found naturally in many fruits, apples in particular, and it takes part in the body's normal energy cycle.
This pairing is a long-time favorite in active lifestyle nutrition. Many people choose it for its link to everyday energy and stamina, along with its role as a citrulline source.
Where HCl is about a streamlined citrulline form, Malate brings an energy-minded partner along for the ride.
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Go to the order page →Why both forms matter in a daily capsule
Having both forms in the same capsule gives PressPril two complementary approaches to the same goal. A quick side-by-side:
- HCl: citrulline with hydrochloride, a stable, easily dissolved form.
- Malate: citrulline with malic acid, a form associated with everyday energy.
- Together: a well-rounded citrulline profile that supports nitric oxide production.
These two forms are paired with L-Arginine (base and AKG), Beta Alanine and Niacin (Vitamin B3) to complete the formula. The full Supplement Facts panel is printed on the bottle label and customer support can share details.
To see the whole formula in one place, visit the ingredients page or read our overview of PressPril ingredients.
Citrulline in everyday foods
L-Citrulline is not just a supplement ingredient. It shows up in nature too, most famously in watermelon, especially the rind and the flesh close to it. Cucumbers, pumpkins and other members of the gourd family also contain it.
Eating these foods is a refreshing way to add variety to your diet. A chilled slice of watermelon on a summer afternoon is hydrating and delicious, and it ties in nicely with a routine built around circulation support.
Food and capsules play different roles. Foods bring fiber, water and a wide range of nutrients, while a capsule offers a consistent, convenient daily habit. Many adults enjoy both.
How citrulline fits the PressPril formula
Citrulline is one part of a five-ingredient formula. It works alongside L-Arginine (base and AKG) to support the nitric oxide pathway, and next to Beta Alanine and Niacin (Vitamin B3), which add general energy nutrition.
This teamwork is what makes the formula feel complete. Each ingredient has a clear job, and the capsule format means you do not have to juggle several bottles.
If you want to keep exploring, our post on L-Arginine and nitric oxide covers the other half of the nitric oxide story, and the benefits page explains how it all supports circulation and vitality.
Simple takeaways
If you remember only three things from this guide, make them these. First, both HCl and Malate are forms of the same amino acid, L-Citrulline. Second, the body can convert citrulline into L-Arginine, which is why the two are paired. Third, PressPril includes both citrulline forms, so you get a broader approach in a single capsule.
Add a daily walk and a plant-rich plate, and you have a practical, enjoyable circulation routine.
You can find the full Supplement Facts panel printed on the bottle label, and customer support can share details.
Making the most of your daily routine
Ingredient names are only part of the picture. The routine around them matters just as much.
Take 1 capsule daily with a full glass of water, as directed on the label, and tie it to a habit you already have. Add a daily walk, a plant-forward meal, and a regular bedtime. The MyPlate site has plenty of simple meal ideas to get you started.
Each PressPril bottle holds 30 capsules, a 30-day supply. Packs of 2 bottles ($89 each), 3 bottles ($59 each) and 6 bottles ($49 each) let you choose the length of routine you want to build. See them on the pricing page. Every order is backed by a 60-day money-back guarantee, so you can build your routine with confidence.
Frequently asked questions
What is the difference between L-Citrulline HCl and Malate?
HCl pairs citrulline with hydrochloride for a stable, easily dissolved form. Malate pairs citrulline with malic acid, a form often associated with everyday energy.
Why does PressPril use both?
Using both forms gives the capsule a well-rounded citrulline profile to support nitric oxide production as part of a daily circulation routine.
How is citrulline related to L-Arginine?
The body can convert L-Citrulline into L-Arginine, which is a starting material for nitric oxide. That is why the two are commonly paired.