Cereboost®
250 mg of clinically studied American ginseng extract — standardized to >10% ginsenosides — that improves working memory within 3 hours through cholinergic enhancement and glycemic modulation, without stimulatory side effects.
Primacy Research
What Cereboost® Does For You
Working Memory Improvement in 3 Hours
Scholey et al. (2010) demonstrated significant Corsi block span improvement at 200 mg Cereboost® — peaking at 3 hours post-dose in a randomized, double-blind, placebo-controlled crossover trial.
Precision-Dosed Inverted-U Response
200 mg outperformed both 100 mg (partial effect) and 400 mg (diminished returns) — an inverted-U dose-response characteristic of cholinergic compounds. APEX delivers 250 mg for individual variability coverage.
Triple Cholinergic Enhancement
Ginsenosides inhibit AChE (preserving acetylcholine), upregulate ChAT (producing more acetylcholine), and sensitize M1 muscarinic receptors (strengthening the downstream signal) — three leverage points on the same pathway.
Glycemic Modulation for Cognitive Stability
Vuksan et al. (2000) showed American ginseng reduced postprandial glycemia by ~20%. Working memory is the most glucose-sensitive cognitive function — smoothing blood sugar fluctuations directly protects cognitive stability.
Calm Nootropic, Not Stimulant
American ginseng’s high Rb1/Rg1 ginsenoside ratio produces cognitive enhancement without CNS excitation — the opposite of Asian ginseng’s stimulatory profile. Improves attention while actually increasing subjective calmness.
Working Memory Is Fading Under Load
Working memory — your brain’s real-time scratchpad for holding and manipulating information — declines approximately 10% per decade after age 30. It’s the capacity that lets you follow complex conversations, solve multi-step problems, and maintain context across task switches. Cholinergic decline, blood glucose fluctuations, and neuroinflammation all converge to degrade this foundational cognitive function.
Cholinergic Erosion
Acetylcholine is the neurotransmitter of working memory and focused attention. AChE activity increases with age, clearing ACh from the synapse faster. ChAT activity declines, producing ACh more slowly. The gap between production and degradation widens every decade.
Working Memory Capacity Loss
Working memory capacity — measured by tasks like Corsi block span and N-back — declines measurably from the 30s onward. By 60, the ‘mental scratchpad’ holds fewer items, updates more slowly, and is more vulnerable to distraction.
Glycemic Vulnerability
The brain consumes ~20% of blood glucose. Post-meal insulin spikes and reactive hypoglycemia create cognitive dips that disproportionately impair working memory — the most glucose-sensitive cognitive function.
How Cereboost® Works
Cereboost® is a standardized American ginseng (Panax quinquefolius) extract with >10% ginsenosides — bioactive saponins with a distinctly calming-nootropic profile. Unlike Asian ginseng (which is stimulatory), American ginseng’s high Rb1/Rg1 ratio enhances cognition without excitation.
AChE Inhibition — Preserving Acetylcholine
Ginsenosides Rb1 and Rg1 inhibit acetylcholinesterase (AChE), slowing the enzymatic breakdown of acetylcholine in the synaptic cleft. This extends the functional lifespan of each ACh molecule — supporting acetylcholine availability through a natural enzymatic pathway.
ChAT Upregulation — Producing More Acetylcholine
Preclinical evidence suggests American ginseng extract increases choline acetyltransferase (ChAT) activity in cholinergic neurons, accelerating the conversion of choline to acetylcholine. Combined with Citicoline’s choline supply, this creates a ‘substrate + enzyme’ amplification effect.
M1 Muscarinic Receptor Modulation
Preclinical work suggests Ginsenoside Rg1 upregulates M1 muscarinic receptor expression in the hippocampus — potentially enhancing post-synaptic sensitivity to acetylcholine. More receptors may mean each ACh molecule produces a stronger downstream signal.
Glycemic Modulation
American ginseng is one of the most validated botanicals for glycemic control. Ginsenosides may improve insulin sensitivity and smooth postprandial glucose excursions — potentially reducing the blood sugar dips that impair working memory performance.
What the Research Shows
Cereboost® is backed by randomized, placebo-controlled trials demonstrating acute working memory improvement, dose-response optimization, and glycemic benefits.
Scholey et al. (2010). Psychopharmacology, 212(3):345-356. Healthy young adults, acute single dose, Cereboost® at 100/200/400 mg. Inverted-U dose-response.
Ossoukhova et al. (2015). Human Psychopharmacology, 30(2):108-122. 200 mg Cereboost®. Middle-aged adults showed significant Corsi block span improvement.
Vuksan et al. (2000). Archives of Internal Medicine, 160(7):1009-1013. American ginseng reduced postprandial glycemia by ~20% in both non-diabetic and T2DM subjects.
Your Daily Dose in APEX
Why this dose works: Scholey et al. (2010) tested 100, 200, and 400 mg and identified 200 mg as the optimal dose — with 400 mg showing diminished returns (inverted-U curve). APEX delivers 250 mg, providing a margin above the 200 mg sweet spot for individual variability in absorption and body weight. Cereboost® standardization (>10% ginsenosides) delivers 2–3x more active compounds per milligram than generic American ginseng powders.
How Cereboost® Connects Across the System
Cereboost® doesn’t work in isolation. Inside the Primacy protocol, it enhances cholinergic signaling through three leverage points while connecting to glycemic, perfusion, and membrane pathways across both APEX and RESET.
The Cholinergic Optimization Stack
Citicoline provides the raw material (choline). Cereboost® optimizes the machinery: inhibiting the breakdown enzyme (AChE), upregulating the production enzyme (ChAT), and sensitizing the post-synaptic receptor (M1 muscarinic). This three-point optimization is designed so that choline from Citicoline is converted to ACh efficiently, persists in the synapse longer, and produces a stronger downstream signal.
Calm Cognition Stack
Cereboost®’s high Rb1/Rg1 ginsenoside ratio produces cognitive enhancement without CNS excitation — the opposite of Asian ginseng’s stimulatory profile. Combined with L-Theanine’s alpha-wave promotion, the result is a dual-pathway system for focused mental clarity that doesn’t compete with APEX’s caffeine/methylxanthine stack but complements it: stimulatory energy (caffeine) channeled through calm precision (Cereboost + Theanine).
Glycemic + Cholinergic Continuity
Working memory is the most glucose-sensitive cognitive function. Cereboost® and Ceylon Cinnamon smooth blood glucose fluctuations during the day, maintaining the brain’s primary fuel supply. At night, RESET’s AvailOm® DHA maintains the membrane environment that cholinergic signaling depends on. Fuel stability (day) + structural maintenance (night).
Key Takeaways
Working Memory Improvement Within 3 Hours
Scholey et al. (2010) demonstrated significant Corsi block span improvement at 200 mg Cereboost® — peaking at 3 hours post-dose. APEX delivers 250 mg, slightly above the optimal dose for individual variability coverage.
Inverted-U Dose-Response — Precision Dosing
200 mg outperformed both 100 mg (partial effect) and 400 mg (diminished returns). This inverted-U curve is characteristic of cholinergic compounds — too little is insufficient, too much can impair. APEX sits at the precision sweet spot.
Calm Nootropic, Not Stimulant
American ginseng’s high Rb1/Rg1 ginsenoside ratio produces cognitive enhancement without the CNS excitation of Asian ginseng. It improves attention and working memory while actually increasing subjective calmness — making it synergistic rather than competitive with APEX’s caffeine stack.
Three-Point Cholinergic Optimization
Inside APEX, Cereboost® connects to Citicoline (substrate supply), Uridine (membrane integrity), and the caffeine system (arousal). It doesn’t just provide choline — it optimizes the enzymes that process it and the receptors that respond to it.
Frequently Asked Questions
What is Cereboost®?
Cereboost® is a standardized American ginseng (Panax quinquefolius) extract with >10% ginsenosides. It is clinically studied for acute working memory improvement, with effects detectable within 3 hours of a single dose. Unlike Asian ginseng, American ginseng enhances cognition without stimulatory side effects.
How is American ginseng different from Asian ginseng?
American ginseng (Panax quinquefolius) has a distinctly different ginsenoside profile from Asian ginseng (Panax ginseng) — with a higher Rb1/Rg1 ratio that produces calming-nootropic effects rather than CNS stimulation. It enhances working memory and attention while increasing subjective calmness, making it complementary rather than competitive with APEX’s caffeine stack.
What does Cereboost® do for working memory?
Scholey et al. (2010) and Ossoukhova et al. (2015) both demonstrated significant working memory improvement (measured by Corsi block span and choice reaction time) at 200 mg Cereboost®. The effect peaks at approximately 3 hours post-dose and has been confirmed in both young and middle-aged adults.
Why is the APEX dose 250 mg instead of the optimal 200 mg?
Scholey et al. (2010) identified 200 mg as the peak of the inverted-U dose-response curve. APEX delivers 250 mg — slightly above the optimum to provide a margin for individual variability in absorption and body weight. This sits well below the 400 mg threshold where diminishing returns begin.
Does Cereboost® help with blood sugar?
Yes. American ginseng is one of the most validated botanicals for glycemic control. Vuksan et al. (2000) showed it reduced postprandial glycemia by ~20% in both non-diabetic and type 2 diabetic subjects. Since working memory is the most glucose-sensitive cognitive function, glycemic stabilization directly supports cognitive performance.
How much Cereboost® is in APEX?
APEX delivers 250 mg of Cereboost® per serving, standardized to >10% ginsenosides — delivering 2–3x more active compounds per milligram than generic American ginseng powders, positioned just above the clinically optimal 200 mg dose.
References
- [1]Scholey, A., Ossoukhova, A., Owen, L., Ibarra, A., Pipingas, A., He, K., Roller, M., & Stough, C. (2010). Effects of American ginseng (Panax quinquefolius) on neurocognitive function: An acute, randomised, double-blind, placebo-controlled, crossover study. Psychopharmacology, 212(3), 345–356.View
- [2]Ossoukhova, A., et al. (2015). Improved working memory performance following administration of a single dose of American ginseng (Panax quinquefolius L.) to healthy middle-age adults. Human Psychopharmacology, 30(2), 108–122.View
- [3]Vuksan, V., et al. (2000). American ginseng (Panax quinquefolius L) reduces postprandial glycemia in nondiabetic subjects and subjects with type 2 diabetes mellitus. Archives of Internal Medicine, 160(7), 1009–1013.View
Upgrade Your Working Memory
Cereboost® is one of 28 active ingredients in APEX, engineered to work as a system — not a stack of standalone compounds.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.