Arginine Silicate Inositol Complex (Nitrosigine-type) vs. L-Arginine Pyroglutamate
Among 1,304 on-market l-arginine products with an identifiable primary form, 7.2% use Arginine Silicate Inositol Complex (Nitrosigine-type) (94 products) and 4% use L-Arginine Pyroglutamate (52).
| Arginine Silicate Inositol Complex (Nitrosigine-type) | L-Arginine Pyroglutamate | |
|---|---|---|
| Quality tier | Unrated | Unrated |
| L-Arginine by weight | — | 57.4% |
| Share of market | 7.2% | 4% |
| On-market products | 94 | 52 |
| Median declared dose | — | 574 mg middle half: 354.15–861 |
| Most common brands | PS ProSupps, MuscleTech Performance Series, Axe & Sledge Supplements | Source Naturals, Anabolic Warfare, Higher Nature |
Doses are declared per serving in mg. “By weight” is the share of the ingredient that is the nutrient itself (e.g. elemental magnesium in a magnesium salt).
Why Arginine Silicate Inositol Complex (Nitrosigine-type) is unrated
Branded complex with its own small trials (e.g. acute vasodilation and cognition studies); no comparison against other arginine forms was verified.
Why L-Arginine Pyroglutamate is unrated
No head-to-head human bioavailability or efficacy comparison of this form was located in PubMed searches.
Tiers summarize published comparative bioavailability or outcome evidence for each form (see methodology).
This page describes the market; it is not a recommendation to take either form. Talk to a clinician about what's right for you.
Other l-arginine comparisons
- L-Arginine Hydrochloride vs. Arginine Alpha-Ketoglutarate (AAKG)
- L-Arginine Hydrochloride vs. Arginine Silicate Inositol Complex (Nitrosigine-type)
- L-Arginine Hydrochloride vs. Arginine Nitrate
- L-Arginine Hydrochloride vs. L-Arginine Pyroglutamate
- Arginine Alpha-Ketoglutarate (AAKG) vs. Arginine Silicate Inositol Complex (Nitrosigine-type)
- Arginine Alpha-Ketoglutarate (AAKG) vs. Arginine Nitrate
- Arginine Alpha-Ketoglutarate (AAKG) vs. L-Arginine Pyroglutamate
- Arginine Silicate Inositol Complex (Nitrosigine-type) vs. Arginine Nitrate
- Arginine Nitrate vs. L-Arginine Pyroglutamate