Limited-time pricing: from $49 per bottle (regular $99) · Free US shipping on 3+ bottles
  1. Home
  2. Blog
  3. The 24-hour nitric-oxide cycle: fast arginine, slow AKG, recycled citrulline

The 24-hour nitric-oxide cycle: fast arginine, slow AKG, recycled citrulline

Ingredient science7 min readUpdated September 2026

One dose, four forms, one steady curve. Here is the timing logic inside every MemoClear capsule.

The problem with a single form

Plain L-Arginine acts fast, but it is also cleared fast. Take it once in the morning and by early afternoon the effect is fading. A formula built on one form gives you a peak and a trough, which is exactly the pattern MemoClear is designed to avoid.

Four forms, four timings

  • L-Arginine base: the starter. Absorbed quickly, it gets nitric-oxide production moving within the first hour or two.
  • Arginine AKG: the extender. Bonded to alpha-ketoglutarate, it releases more gradually and carries support into the afternoon.
  • Citrulline HCL: the recycler. Converted to arginine in the kidneys, it refills the pool as it is used.
  • Citrulline Malate: the energiser. Adds malate to the energy cycle and helps clear the by-products of a hard-working day.
Nitric-oxide support across the day (illustrative)
Contribution of each form after a morning capsule
Arginine baseArginine AKGCitrulline formsCombined

Conceptual timing curves to show the design intent. Not measured data.

What you notice

Instead of a lift that fades by lunch, the combined curve stays high through the working day and settles gently in the evening. Customers describe it as an even day: steady focus at 10 a.m., steady focus at 3 p.m., and no wired feeling at bedtime.

Why no caffeine

Caffeine would add a sharp spike on top of this curve and a crash after it. Leaving it out is what lets MemoClear deliver the flat, reliable line the chart shows, and what lets you keep drinking your normal coffee alongside it.

From $49 / bottleRegular $99 · 60-day guarantee
Order Now