Two MYKO protocol formulas, two adjacent but distinct pathways. Here's how to choose between them, why most practitioners eventually run both on different arcs, and what each is calibrated for.
Short answer
Run NEUROGENESIS when the season is cognitive-demand-driven — long study, deep work, attention-intensive periods. Run CORTEX when the season is stress-driven — high-load quarters, demanding pressure environments, periods where you need calm vigilance without sedation. Most MYKO practitioners run both, on different arcs, choosing the formula by what the next 4–8 weeks of life actually require.
The formulas share the four-role architecture (signal · growth · fuel · delivery) and the Active Botanical at 100 mg, but differ on the growth mushroom (Lion's Mane vs Reishi) and the relative weight of the fuel layer (Cordyceps 150 mg vs 200 mg).
The architecture difference in one line
NEUROGENESIS is signal + cognitive growth + balanced fuel + delivery. CORTEX is signal + calm-anchored growth + dominant fuel + delivery.
Side by side
| NEUROGENESIS | CORTEX | |
|---|---|---|
| Built for | Cognitive-pathway support during high-demand seasons | Stress-pathway support during high-pressure seasons |
| Signal layer | Active Botanical (standard variant), 100 mg | Active Botanical (standard variant), 100 mg |
| Growth mushroom | Lion's Mane (Hericium erinaceus), 7:1 fruiting body, 200 mg | Reishi (Ganoderma lucidum), 10:1 fruiting body, 150 mg |
| Growth research framing | NGF / BDNF preclinical work; neural structural support | Triterpene-fraction stress-response work; HPA-axis-adjacent |
| Fuel mushroom | Cordyceps militaris, 8:1 fruiting body, 150 mg | Cordyceps militaris, 8:1 fruiting body, 200 mg (dominant role) |
| Delivery layer | Shilajit 60% fulvic acid, 100 mg | Shilajit 60% fulvic acid, 100 mg |
| Felt character | Crisp, cognitively-toned, supports attention and integration | Steady, grounded, supports composure under load |
| Best protocol cadence | Stamets (4 ON / 3 OFF) common for cognitive arcs | Fadiman (1 ON / 2 OFF) common for stress arcs (broader spacing aids recovery) |
| Common companion-stack pairing | B-complex AM, magnesium glycinate PM | B-complex AM, magnesium glycinate PM, plus extra evening breath/walks |
| Total active fill | 550 mg | 550 mg |
| SKU sizes / pricing | 16/$44 · 33/$77 · 66/$132 · 132/$248 | 16/$44 · 33/$77 · 66/$132 · 132/$248 |
The mechanism difference, explained
NEUROGENESIS leans on Lion's Mane (the growth layer)
Lion's Mane's compound families — hericenones and erinacines — have been studied in preclinical models for their relationship to NGF (nerve growth factor) and BDNF signaling, the pathways involved in neural growth and maintenance. At 200 mg of fruiting body 7:1 extract, NEUROGENESIS uses Lion's Mane as the primary structural input alongside the Active Botanical's signal layer. The cognitive pathway architecture (signal + growth + fuel + delivery) is built around this pairing.
NEUROGENESIS's Cordyceps is at 150 mg — meaningful, but secondary to the Lion's Mane growth role. The fuel layer supports cognitive metabolism but isn't the formula's leading edge. The longer mechanism version is in Why NEUROGENESIS Was Built This Way: Signal, Growth, Fuel, Delivery.
CORTEX leans on Cordyceps (the fuel layer) and Reishi (the calm anchor)
CORTEX flips the weighting. Cordyceps moves to 200 mg (the line's highest dose, vs 150 mg in NEUROGENESIS), because steady energy under load is the central design problem stress-pathway formula solves. Reishi at 150 mg holds the calm-anchored growth role — its triterpene fraction is what carries the stress-response and HPA-axis-adjacent activity that gives CORTEX its calm-vigilance character.
Lion's Mane is absent from CORTEX. The cognitive-pathway architecture isn't what CORTEX is solving for; the stress-pathway architecture leans on Cordyceps + Reishi + the signal layer instead. The longer mechanism version is in the CORTEX product page deep dive and in Why Stress Resilience Is a System, Not a Single Ingredient.
Which formula matches which season
| Season / situation | NEUROGENESIS or CORTEX | Why |
|---|---|---|
| Heavy study quarter, deep learning project, exam prep | NEUROGENESIS | Cognitive-pathway architecture, Lion's Mane growth role |
| Creative work block, deep focus sessions, writing arcs | NEUROGENESIS | Same — the cognitive flexibility framing matches the use case |
| High-pressure work quarter, multiple deadlines, sustained stress without sleep impairment | CORTEX | Stress-pathway architecture, Cordyceps + Reishi for steady energy under load |
| Founder / executive quarter, decision fatigue, leadership pressure | CORTEX | Calm vigilance frame matches the demand pattern |
| Parent of young children stretch, sustained nervous-system load with sleep compromise | CORTEX | Stress-pathway support; nervous-system focus more than cognitive |
| New job, intense onboarding, high cognitive demand layered with stress | Either — pick the dominant pattern | Lean NEUROGENESIS if the cognitive demand is heavier; lean CORTEX if the stress is the bigger surface |
| Recovery from a hard quarter, restorative season | Neither — consider EMBODY | EMBODY's recovery-and-immune architecture is the right fit for restorative arcs |
How to decide between them when the case is ambiguous
Most life situations have both cognitive demand and stress. The framework for picking between NEUROGENESIS and CORTEX is to identify which pattern is the leading surface, not whether stress or cognition is present:
Lead with NEUROGENESIS if: the demand on cognition is what's stressing you (deep work, long study sessions, attention-intensive periods). The cognitive load is the cause; the stress is downstream.
Lead with CORTEX if: the stress is what's compromising cognition (high-pressure environments, sustained pressure, demanding social/decision load). The stress is the cause; the cognitive compromise is downstream.
Both formulas can support the other pathway as a side effect; both work best when matched to their primary use case. The longer protocol-cadence decision is in Stamets vs. Fadiman: How to Pick a Microdose Protocol.
The practical layered pattern
Most NEUROGENESIS-or-CORTEX practitioners eventually do both, on different arcs. A common annual pattern looks like:
| Quarter | Daily foundation | Protocol arc | Why |
|---|---|---|---|
| Q1 (winter / heavy work start) | ADAPT daily | NEUROGENESIS, 4–8 weeks, Stamets cadence | Cognitive demand peak; cognitive-pathway support |
| Q2 (spring / sustained pressure) | ADAPT daily | CORTEX, 4–8 weeks, Fadiman cadence | Stress-pathway support during sustained-pressure stretch |
| Q3 (summer / lighter load) | ADAPT daily | None — reset | Both the receptor systems and the practitioner benefit from extended off-cycles |
| Q4 (fall / project closing) | ADAPT daily | NEUROGENESIS, 4–8 weeks, cadence by demand pattern | Cognitive intensity returns; cognitive-pathway support |
That's the version of the layered practice that compounds. ADAPT is the continuous floor; NEUROGENESIS and CORTEX are the protocol arcs chosen by season. The longer NEUROGENESIS-vs-ADAPT comparison is in NEUROGENESIS vs ADAPT: Which MYKO Formula Should You Take First?
FAQ — common NEUROGENESIS vs CORTEX questions
Can I take NEUROGENESIS and CORTEX in the same arc?
Not recommended. Both contain the Active Botanical at 100 mg; taking them together stacks the signal layer above what the protocol framework is built around. Run one arc per quarter on one formula; choose based on the season's demand pattern.
Which one helps me focus better?
NEUROGENESIS is the cognitive-pathway formula and is built around supporting attention and cognitive flexibility specifically. But "focus" is a category, not a single mechanism — if your focus problem is downstream of stress, CORTEX can serve the focus goal better by handling the upstream cause. The longer focus-specific framing is in The Best Mushroom Supplements for Focus.
Which one helps me sleep better?
Neither is a sleep formula. CORTEX's Reishi backbone supports nervous-system regulation that often improves sleep architecture as a downstream effect; NEUROGENESIS doesn't have that calm-anchor layer. If sleep is the primary concern, the longer sleep-supplement framing is in The Best Mushroom Supplements for Sleep.
Which one is "stronger"?
Wrong question. Both formulas use the same 100 mg Active Botanical, the same 550 mg total active fill, and the same Shilajit delivery layer. They differ in mushroom subset and the relative weighting of the fuel layer. "Stronger" depends on which pathway you're measuring.
Which has more Cordyceps?
CORTEX, at 200 mg vs NEUROGENESIS's 150 mg. The Cordyceps dose difference reflects CORTEX's design intent (steady energy under load as the central problem) vs NEUROGENESIS (where Lion's Mane carries the lead growth role and Cordyceps supports it).
If I'm new to MYKO and want one of these, which should I try first?
Honestly, run ADAPT for 60 days first. The daily foundation underneath either protocol formula is more load-bearing than the choice between NEUROGENESIS and CORTEX. The longer first-formula guide is in NEUROGENESIS vs ADAPT: Which MYKO Formula Should You Take First? Once you have a baseline, choose the protocol formula by the season you're going into when you start the arc.
Can I switch between them mid-arc?
Not recommended. The protocol framework is built around running one formula for a complete 4–8 week arc. Switching mid-arc compromises both the cadence and the architecture's compounding work. If you start an arc and the season changes meaningfully, complete the arc, take the reset period, then start the next arc on the formula that matches the new season.
A closing reflection
The NEUROGENESIS-vs-CORTEX question is the protocol-design version of the broader MYKO architecture question: which pathway needs the attention right now? Both formulas use the same design language; they're calibrated for different jobs.
The cleanest decision frame is: lead the formula by season, run one arc at a time on top of ADAPT, alternate over the year as the demand pattern shifts. Most practitioners end up running both within a 12-month period, not because the formulas are interchangeable but because life is. Cognitive demand seasons and stress-demand seasons each have their own architecture; the formulas are designed to match. Continue with The Five MYKO Formulas Compared for the system-wide comparison, or with The Four-Role Architecture: How MYKO Formulas Are Built for the design-language deep dive.