L-Glutamine, L-Arginine, Beta-Alanine, GABA and L-Tryptophan.
This group combines amino acids and a calming neurotransmitter precursor, positioned around digestive comfort and a settled, non-jittery experience alongside the more stimulating ingredients elsewhere in the formula.
L-Glutamine is often discussed in relation to gut-lining support, while L-Arginine contributes to nitric oxide production relevant to circulation.
GABA and L-Tryptophan are both linked to calming, mood-related pathways — GABA directly, and tryptophan as a precursor to serotonin — which may help offset any stimulant effect from the metabolism group's green tea and guarana.