Nootropic Ingredient Guides
The science on a single compound — mechanism, clinically studied dose, timing, safety and interactions, with every evidence rating linked to the real studies behind it.
Written with AI assistance and reviewed by the NorwegianSpark SA editorial team — CognixCore. Our methodology · Last updated: 2026-07
Lion's Mane
Stimulates nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) production via hericenones and erinacines, promoting neurogenesis and myelination in the hippocampus.
Bacopa Monnieri
Enhances synaptic communication via bacosides A and B, modulating serotonin, dopamine, and acetylcholine. Upregulates tryptophan hydroxylase and promotes dendritic branching.
Ashwagandha
Withanolides modulate the HPA axis, reducing cortisol production. Also acts as a GABAergic anxiolytic and supports thyroid hormone synthesis. May raise DHEA-S and testosterone in men (studied mainly in male-specific trials).
Alpha-GPC
Highly bioavailable choline donor that crosses the blood-brain barrier. Converted to acetylcholine, supporting memory encoding, attention, and muscle contraction via cholinergic transmission.
Citicoline
Provides both choline and cytidine (converted to uridine). Supports phosphatidylcholine synthesis for neuronal membranes while boosting acetylcholine and dopamine levels in the prefrontal cortex.
L-Theanine
Crosses the BBB and increases alpha brain wave activity. Modulates GABA, serotonin, and dopamine. Promotes relaxed alertness by reducing excitatory glutamate activity.
Rhodiola Rosea
Rosavins and salidroside modulate cortisol and stimulate AMPK pathway. Inhibits MAO-A/B enzymes in vitro, a proposed basis for raised serotonin and dopamine availability. Enhances stress-resistant protein expression (HSP70).
Omega-3 (EPA/DHA)
DHA integrates into neuronal membranes, enhancing fluidity and receptor function. EPA resolves neuroinflammation via SPMs (specialized pro-resolving mediators). Together they support synaptic plasticity.
Magnesium Glycinate
Magnesium blocks NMDA receptors and activates GABA-A receptors, reducing neuronal excitability. Glycinate form offers high bioavailability and the amino acid glycine provides additional calming effects.
Magnesium L-Threonate
The only magnesium form clinically demonstrated to cross the blood-brain barrier and elevate brain magnesium levels. Enhances synaptic density in the prefrontal cortex and hippocampus.
NMN (Nicotinamide Mononucleotide)
Direct precursor to NAD+ via the salvage pathway. Elevates NAD+ levels to activate sirtuins (SIRT1-7) for DNA repair, mitochondrial function, and epigenetic regulation of aging pathways.
CoQ10 (Ubiquinone)
Essential electron carrier in the mitochondrial electron transport chain (Complex III). Also functions as a potent lipid-soluble antioxidant, protecting membranes from oxidative damage.
Phosphatidylserine
Major component of neuronal cell membranes. Modulates membrane fluidity, neurotransmitter release (acetylcholine, dopamine), and blunts cortisol response to stress via HPA axis regulation.
Saffron (Crocus sativus)
Crocin and safranal modulate serotonin reuptake and NMDA receptor activity. Anti-inflammatory via NF-kB inhibition. Clinically comparable to low-dose SSRIs for mild-to-moderate depression.
Apigenin
Binds to benzodiazepine sites on GABA-A receptors as a positive allosteric modulator, providing anxiolytic effects. Also inhibits CD38 enzyme, potentially preserving NAD+ levels.
Creatine (Monohydrate)
Replenishes phosphocreatine stores to rapidly regenerate ATP in neurons and muscle cells. Enhances brain bioenergetics, particularly under conditions of sleep deprivation or cognitive demand.
Vitamin D3 (Cholecalciferol)
Binds to VDR receptors in the brain, modulating a broad range of genes involved in neuroplasticity, immune regulation, and calcium signaling. Supports serotonin synthesis via TPH2 activation.
PQQ (Pyrroloquinoline Quinone)
Stimulates mitochondrial biogenesis via PGC-1α activation. Acts as a potent redox cofactor cycling 20,000+ times before degrading (vs ~4 for Vitamin C). Protects neurons from oxidative stress.
ALCAR (Acetyl-L-Carnitine)
Crosses the BBB and donates acetyl groups for acetylcholine synthesis. Transports long-chain fatty acids into mitochondria for beta-oxidation. Supports neuronal energy metabolism and neuroprotection.
Noopept
Modulates AMPA and NMDA glutamate receptors, enhancing long-term potentiation. Increases BDNF and NGF expression in the hippocampus. Up to 1000x more potent by weight than piracetam.
Ready to combine them? Browse the curated stacks — the protocol pages cover when and why to pair these compounds.
Informational only — not medical advice. Consult a healthcare professional before starting any supplement, especially if pregnant, breastfeeding, or taking medication.