Quick Comparison
| Creatine | Polygala Tenuifolia | |
|---|---|---|
| Half-Life | 3 hours (plasma), but tissue stores persist for weeks | 3-6 hours (tenuigenin and polygalasaponins) |
| Typical Dosage | Standard: 3-5 g daily (no loading phase needed for cognitive effects). Loading (optional): 20 g daily for 5-7 days, then 3-5 g maintenance. Creatine monohydrate is the most studied form. | Standard: 100-300 mg extract daily (standardized to 3,6'-disinapoyl sucrose or polygalasaponins). Can be taken morning or evening. Some users take it before bed for dream enhancement. Effects noticeable within hours of first dose. |
| Administration | Oral (powder, capsules). Creatine monohydrate is the gold standard form with the most research support. | Oral (capsules, powder, tincture). Extract preferred over raw root for potency and reduced GI irritation. |
| Research Papers | 10 papers | 10 papers |
| Categories |
Mechanism of Action
Creatine
Creatine is phosphorylated by mitochondrial creatine kinase (CK-Mt) to form phosphocreatine (PCr), which serves as a rapidly mobilizable high-energy phosphate reserve. When neuronal ATP is consumed during demanding tasks (synaptic vesicle cycling, ion pump activity, action potential propagation), cytosolic brain-type creatine kinase (CK-BB) catalyzes the transfer of the phosphoryl group from PCr to ADP, regenerating ATP within milliseconds — far faster than oxidative phosphorylation or glycolysis can respond. This PCr/CK shuttle also transports high-energy phosphates from mitochondria to distant synaptic sites. Creatine provides direct neuroprotection by stabilizing the mitochondrial permeability transition pore (mPTP), preventing cytochrome c release and downstream apoptotic cascades. It scavenges reactive oxygen species by acting as a direct antioxidant against superoxide and peroxynitrite. Creatine also increases GLUT4 expression in neurons, improving glucose uptake, and upregulates brain-derived neurotrophic factor (BDNF) expression in the hippocampus, supporting synaptic plasticity and memory consolidation.
Polygala Tenuifolia
The saponins (tenuigenin, polygalasaponins, onjisaponins) and oligosaccharide esters (3,6'-disinapoyl sucrose, tenuifolisides) have multiple neurological actions. They inhibit acetylcholinesterase (AChE) at the catalytic site, increasing synaptic acetylcholine and enhancing muscarinic M1/M4 and nicotinic receptor signaling. They promote BDNF and NGF expression via CREB and ERK/MAPK pathways, supporting neuroplasticity and neurogenesis in the hippocampus and subventricular zone. They modulate NMDA receptor function (possibly as positive allosteric modulators at the glycine site) and enhance long-term potentiation (LTP) via CaMKII and PKC. The anti-depressant effects involve monoaminergic modulation — increasing dopamine and norepinephrine via MAO inhibition or reuptake modulation — and HPA axis regulation (reducing CRH and cortisol). Tenuigenin may also activate TrkB receptors directly.
Risks & Safety
Creatine
Common
Water retention (mild weight gain), gastrointestinal discomfort at high doses.
Serious
Very safe — one of the most studied supplements in existence. No kidney damage in healthy individuals.
Rare
Muscle cramping, dehydration if water intake is insufficient.
Polygala Tenuifolia
Common
Nausea, gastrointestinal irritation (take with food).
Serious
Limited long-term safety data in Western research.
Rare
Throat irritation, excessive salivation.
Full Profiles
Creatine →
Best known as a sports supplement, creatine is increasingly recognized as one of the most effective cognitive enhancers available — particularly for vegetarians, the sleep-deprived, and older adults. It serves as a rapid energy buffer for neurons by recycling ATP, the cell's primary energy currency. The brain consumes enormous amounts of ATP, making creatine supplementation directly relevant to cognitive performance.
Polygala Tenuifolia →
Known as Yuan Zhi in Traditional Chinese Medicine, Polygala tenuifolia has been used for thousands of years as a 'will-strengthening' and memory-enhancing herb. Modern research shows it enhances BDNF expression, inhibits acetylcholinesterase, and promotes neurogenesis. Users commonly report improved verbal fluency, dream vividness, and motivation. One of the more noticeable adaptogens with acute effects.