Reliable, cheap CS-4 from a trusted brand — but not the cordycepin-rich militaris form.
NOW Foods Cordyceps is the reliable mainstream value entry, and it comes with an interesting wrinkle: it's the CS-4 Cordyceps sinensis form that the older human exercise trials actually used. NOW is a high-volume brand with in-house GMP testing and a long record of consistent quality control, the single-capsule 750 mg dosing is flexible, and at around $0.19 a capsule it's cheap and stocked everywhere.
On this list's terms, though, it sits at #6. CS-4 is the fermented mycelium strain of Cordyceps sinensis, grown in culture because real wild sinensis costs more than gold — and it carries lower expected cordycepin than the militaris fruiting body the top picks use, with no beta-glucan number disclosed. That's not a knock on the manufacturing, which is trustworthy; it's a statement about the lineage and form. A sensible, inexpensive, well-made bottle for a value buyer — just not the cordycepin-rich extract that defines the top of the list. Here's the breakdown.
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Read the complete Cordyceps guide →Cordyceps sinensis (CS-4 type) mycelium — not the cordycepin-bearing militaris fruiting body. CS-4 is a legitimate, well-known form (and the one the older human trials used), but it carries lower expected cordycepin and is mycelium rather than a fruiting-body extract. Respectable, but a clear tier below the militaris picks on the axis that decides active content.
Not disclosed on the listing, and CS-4 sinensis mycelium carries lower expected active content than a militaris fruiting body. Scored honestly on 'not stated' plus the lineage — not assumed worthless (CS-4 has human exercise data), but clearly behind the picks that disclose beta-glucan figures.
NOW's in-house GMP testing and 30-plus-year quality-control reputation are genuinely reliable, and the product is vegan and non-GMO. A trustworthy manufacturing story — held just below the COA-publishing and organic-certified picks, but solid mainstream QC.
About $0.19 per 750 mg capsule — one of the cheapest on the list — from a widely-stocked brand, with flexible single-capsule dosing. Strong value: inexpensive, reliable, and easy to find. The product's best axis.
Notably, this is the CS-4 form with actual human exercise data (Chen 2010 — improved sub-maximal thresholds over 12 weeks, though not VO2max), which is a point in its favour even though the cordycepin content is lower. Capped by the mixed evidence and the lower-active-content lineage. A plausible modest support over weeks.
“Cordyceps sinensis (CS-4) 750 mg per capsule.”
Supported by the listing: 750 mg of CS-4 Cordyceps sinensis mycelium per capsule. Accurate as stated — and CS-4 is a legitimate, well-characterised form, notably the one used in the older human exercise trials (Chen 2010).
“GMP-tested for quality and consistency.”
Consistent with NOW's well-documented in-house GMP testing and long quality-control track record. The manufacturing reliability is a genuine strength and one of the reasons to choose NOW at this price point.
“Vegan, non-GMO.”
Stated on the listing and consistent with NOW's standard formulation. Credible and accurate.
“Supports stamina, endurance, and oxygen use.”
There's actual (mixed) human data for the CS-4 form here: Chen 2010 found CS-4 improved sub-maximal metabolic and ventilatory thresholds over 12 weeks — but NOT VO2max. So 'supports stamina/endurance' is honest at the sub-maximal level and overstated as an oxygen-uptake (VO2max) boost. Measured expectations, several weeks of dosing.
An honest point in NOW's favour: the original human cordyceps exercise research was done on CS-4 sinensis, not militaris. Chen 2010 gave older adults CS-4 for 12 weeks and measured improved sub-maximal metabolic and ventilatory thresholds (though not VO2max). So while CS-4 carries less cordycepin than militaris, it isn't an unstudied form — it has real, if modest and mixed, human data behind it, which is more than can be said for many supplements.
The reason it ranks #6: CS-4 is the fermented mycelium of Cordyceps sinensis, grown in culture, and it carries little cordycepin — the marker compound that militaris accumulates (Tuli 2014). It's also mycelium rather than a concentrated fruiting-body extract, and the listing discloses no beta-glucan number. On the active-content axis that defines the top of the list, it's a clear tier below the militaris fruiting-body picks.
Where NOW delivers is dependability and price. In-house GMP testing, a 30-plus-year quality-control reputation, flexible 750 mg single-capsule dosing, vegan and non-GMO, at around $0.19 a capsule and stocked in nearly every retailer. For a value buyer who understands they're getting CS-4 rather than a concentrated militaris extract, that's a perfectly sensible, low-risk purchase.
Even with CS-4's human data, the realistic expectation is modest. Chen 2010 found sub-maximal threshold improvements, not a VO2max boost, and the broader human evidence for cordyceps is limited and mixed. Take it daily for several weeks (the trial ran 12), pair it with actual training, and treat any improvement in exercise economy as a welcome bonus rather than a guaranteed performance jump.
NOW Foods Cordyceps is the dependable, inexpensive mainstream pick, and it carries a genuine point of interest: it's the CS-4 Cordyceps sinensis form that the older human exercise trials used. NOW's in-house GMP testing is reliable, the single-capsule 750 mg dosing is flexible, and at around $0.19 a capsule it's cheap and stocked everywhere. For value buyers, the manufacturing trust and the price are real strengths. It ranks #6 because of lineage and form, not quality of manufacture: CS-4 is lower-cordycepin sinensis mycelium, not the militaris fruiting body the top picks use, and no beta-glucan number is disclosed. The honest evidence read is measured too — Chen 2010 found CS-4 improved sub-maximal exercise thresholds over 12 weeks but not VO2max. So consider NOW if you want a cheap, trusted cordyceps and are fine with the CS-4 trade; choose a militaris fruiting-body extract (Real Mushrooms #1, FreshCap #2, Nootropics Depot #3) if you want verified, cordycepin-relevant active content. Either way, run it for weeks alongside training and keep expectations realistic.
The overall winner — 100% militaris fruiting body with a third-party-verified >8% beta-glucan figure. Buy this if you want the cordycepin-bearing species in a concentrated, disclosed-potency form.
See it on the list →The budget champion — cheapest cost-per-capsule with a disclosed 7% polysaccharide spec and ~3.5-month supply. Also sinensis, but more servings per dollar than NOW.
See it on the list →The high-count value pick — 90 made-with-organic servings per bottle. Another CS-4 sinensis option if you want the most servings per dollar.
See it on the list →20 healthy older adults, 12 weeks: CS-4 (Cordyceps sinensis) at 333 mg ×3/day raised the metabolic threshold by 10.5% and ventilatory threshold by 8.5% versus no change on placebo — but VO2max did NOT change. This is the exact CS-4/sinensis form NOW uses; the evidence is for improved sub-maximal exercise economy, not peak aerobic power.
Cited as the contrast: a Cordyceps militaris blend improved VO2max and time-to-exhaustion after 3 weeks. The stronger endurance signal is on the militaris form, not the CS-4 sinensis form NOW uses — the reason militaris fruiting-body extracts rank above CS-4.
Review of cordycepin, the principal bioactive of Cordyceps militaris. Explains why CS-4 sinensis (which carries little cordycepin) ranks below a militaris fruiting body on active content.
