The Ritua Journal

Research, not hype

Evidence-led reads on sleep, stress, focus, performance and hydration, grounded in the science.

Journal

Pouch of Ritua L-Glutamine beside a glass of clear water on a timber bench

Micronised L-Glutamine: What Particle Size Actu...

Micronising is mechanical milling, not a different form of the ingredient. It changes how fast a powder dissolves, not how much your body absorbs. Here is the physical chemistry, including...

Micronised L-Glutamine: What Particle Size Actu...

Micronising is mechanical milling, not a different form of the ingredient. It changes how fast a powder dissolves, not how much your body absorbs. Here is the physical chemistry, including...

Woman holding a pouch of Ritua L-Glutamine and a water bottle outdoors

When to Take L-Glutamine: What the Research Shows

Before or after training, fasted or with food. Most of an oral glutamine dose is taken up by the gut and liver on first pass, which changes how much the...

When to Take L-Glutamine: What the Research Shows

Before or after training, fasted or with food. Most of an oral glutamine dose is taken up by the gut and liver on first pass, which changes how much the...

Pouch of Ritua L-Glutamine beside a glass of water on a timber bench

L-Glutamine and Gut Health: What the Research S...

Glutamine is the preferred fuel of the cells lining the small intestine, and the mechanism is well established. The human trial evidence is thinner than the internet suggests. Here is...

L-Glutamine and Gut Health: What the Research S...

Glutamine is the preferred fuel of the cells lining the small intestine, and the mechanism is well established. The human trial evidence is thinner than the internet suggests. Here is...

Woman sitting on grass drinking a prepared serve with a pouch of Ritua L-Glutamine beside her

L-Glutamine Dosing: How Much, and When

What your food already supplies, the doses used in human trials, what happens to an oral dose, what the safety reviews concluded, and the honest answer on timing.

L-Glutamine Dosing: How Much, and When

What your food already supplies, the doses used in human trials, what happens to an oral dose, what the safety reviews concluded, and the honest answer on timing.

Two pouches of Ritua L-Glutamine held side by side

Glutamine vs BCAAs vs Protein for Recovery: Wha...

Glutamine, BCAAs and whole protein are often compared as if they solve the same problem. They sit at different levels. Here is what the research actually supports for each.

Glutamine vs BCAAs vs Protein for Recovery: Wha...

Glutamine, BCAAs and whole protein are often compared as if they solve the same problem. They sit at different levels. Here is what the research actually supports for each.

Woman seated against a tree holding a pouch of Ritua L-Glutamine

What L-Glutamine Actually Does: Gut, Immunity a...

L-glutamine is the most abundant free amino acid in the body, and your body makes 40 to 80 grams of it a day. Here is what the research says about...

What L-Glutamine Actually Does: Gut, Immunity a...

L-glutamine is the most abundant free amino acid in the body, and your body makes 40 to 80 grams of it a day. Here is what the research says about...