Alpha-GPC is one of the few things on the focus shelf where the buyer has a good hand. It is a single named chemical with a number printed next to it — no botanical species to argue about, no extract ratio to decode. Eight bottles ought to be separable in ninety seconds. Almost nobody manages it, because the number on the front of the pack and the number on the panel are frequently not the same number.
We read eight label panels through the NIH Dietary Supplement Label Database, then checked each brand's own price and count. Where a brand states nothing, we say so — what a label leaves out is information too.
The five factors, stated before any product appears
Chosen on one test: a reader holding the pack can check every one without taking our word for it.
- Form. Which form is named, and how much per serving. All eight name alpha-GPC, so this comes down to whether the amount lands inside the range tested in healthy adults.
- Disclosure. Is every amount printed beside its ingredient, or is something inside a proprietary blend. Blends are legal and exist so the amounts need not be published.
- Standardisation. Alpha-GPC raw material is often sold at 50% purity on a carrier, so "600 mg" may mean 600 mg of alpha-GPC or 600 mg of a powder that is half alpha-GPC. Does the label resolve it, and is there a lab result to match the bottle.
- Cost per serving. Arithmetic from the real price and count, normalised to cost per 300 mg of alpha-GPC, because servings here run from one capsule to four.
- Buyer confidence. What can be established before paying: stated purity, lot-level lab results, how long the product has been sold.
What this page does not carry: customer ratings. The stars beside each score are a picture of our own score. There are no vote counts here, for any product, ours included.
How the field compares
| Product | Per serving | Serving | Purity stated | Price / count | Per 300 mg |
|---|---|---|---|---|---|
| Weal Focus | 300 mg | 2 capsules | Yes, ≥98% | $39.99 / 60 | $1.33 |
| Nootropics Depot 150 mg | 150 mg per capsule | 1–2 capsules | Lot-matched COA published | $34.99 / 180 | $0.39 |
| Momentous Alpha-GPC | 300 mg (AlphaSize) | 1 capsule | Branded material named | $44.99 / 60 | $0.75 |
| Jarrow Formulas 300 mg | 300 mg | 1 capsule, 1–2× daily | Not stated on the label | $39.99 / 60 | $0.67 |
| Swanson 300 mg | 300 mg | 1 capsule, 1–2× daily | Not stated on the label | $31.39 / 60 | $0.52 |
| NOW Alpha GPC 300 mg | 600 mg | 2 capsules, 2× daily | Not stated on the label | $29.79 / 60 | $0.50 |
| Double Wood 300 mg | 600 mg | 2 capsules | Not stated on the label | $19.95 / 60 | $0.33 |
| Nutricost Alpha GPC | 600 mg | 2 capsules | Seal only, no certificate | $27.97 / 120 | $0.23 |
Panels from the NIH Dietary Supplement Label Database, August 2026; prices read the same week. If one of these is out of date, tell us and we will correct it.
What the research used, and in whom
Two numbers get quoted at shoppers, and they come from different worlds.
In healthy adults the trials sit between roughly 250 and 630 mg a day. A 2024 crossover trial in Nutrients gave 315 mg and 630 mg to 20 resistance-trained men of mean age 31, reporting better Stroop scores against placebo at both and no difference on Flanker or N-Back. A 2017 trial in the Journal of the International Society of Sports Nutrition gave 250 mg or 500 mg for seven days to 48 healthy college-aged men: no change in isometric strength or psychomotor vigilance, an improvement in jump peak power. A 2023 crossover in the same journal used 300 mg for seven days in 30 trained cyclists of mean age 43, alongside two other actives, so alpha-GPC cannot be isolated.
The larger figures, 800 to 1,200 mg, come from trials in adults with diagnosed cognitive impairment, usually alongside a prescription medicine; the 2023 systematic review of that literature (PubMed 36683513) is explicit about the population. Quoting those numbers at a general audience is quoting research that was not run on that audience.
There is also a safety finding worth putting in front of buyers rather than behind them. A 2021 cohort study in JAMA Network Open followed 12,008,977 South Koreans aged 50 and over for ten years and compared 108,877 people prescribed alpha-GPC with matched non-users: adjusted hazard ratio for total stroke 1.46 (95% CI 1.43–1.48) unmatched, 1.43 matched. Those were prescriptions of roughly 1,200 mg a day in an older, more comorbid, clinically diagnosed group, and the dose-response ran by length of prescription rather than milligrams — so it does not show a smaller amount is safer. A 2025 review in Nutrition Reviews concluded the signal awaits validation. Not settled, and not nothing.
The rankings
1
Weal Focus
by Weal Supplements
9.2/10 desk score A
- Form
- 9.5
- Disclosure
- 10
- Standardisation
- 9.0
- Cost per serving
- 6.5
- Buyer confidence
- 7.0
Pros
- 300 mg inside the healthy-adult band, purity (≥98%) stated rather than inferred
- All five actives printed with their own amounts; no proprietary blend
- The only panel here standardising its botanical: lion's mane 400 mg, 100% fruiting body, beta-glucans ≥25%. HPMC capsule, no titanium dioxide
Cons
- Dearest in the field per 300 mg of alpha-GPC — roughly four times what the same amount costs from Nootropics Depot
- Two capsules rather than one; no flavoured or drink format; a new brand with no track record
- 300 mg sits at the lower end of the healthy-adult range, chosen deliberately from inside it
It wins on the declared factors and loses two outright. Every amount printed, the purity stated, the supporting actives all lookupable. What it is not is cheap, and a single-ingredient bottle is a rational purchase for anyone assembling their own combination. A transparency argument, not a value argument.
2
Alpha GPC Capsules 150 mg
by Nootropics Depot
9.0/10 desk score A−
- Form
- 8.0
- Disclosure
- 10
- Standardisation
- 9.5
- Cost per serving
- 9.5
- Buyer confidence
- 9.5
Pros
- The best lab documentation here, ours included: certificates of analysis published per lot, so the bottle in hand matches its own paperwork
- Cheapest credible option at $0.39 per 300 mg from the 180-count bottle
- Clean single-ingredient panel; 150 mg capsules make the amount adjustable
Cons
- At one capsule, 150 mg sits below anything tested in healthy adults
- Nothing else in the bottle — the point, and a limitation
If the question is simply where to buy alpha-GPC, this is the answer, and we would rather say so than pretend otherwise. Lot-matched certificates are the most useful thing a supplement company can publish, and very few do. Not first only because one capsule falls below the healthy-adult range.
3
Alpha-GPC
by Momentous
8.3/10 desk score B+
- Form
- 9.0
- Disclosure
- 10
- Standardisation
- 8.5
- Cost per serving
- 6.0
- Buyer confidence
- 8.0
Pros
- Names the raw material — AlphaSize alpha-glyceryl phosphoryl choline — so a buyer can look up the supplier's specification
- 300 mg in one capsule, the simplest routine here; short excipient list
Cons
- $0.75 per 300 mg, over three times the cheapest option for the same molecule
- No lot-level lab result published; directions stop at one capsule with no stated rationale
A well-made, honestly labelled product that costs what a brand with athlete endorsements costs. Naming the branded raw material is a real transparency step. Price is the argument against: nothing here explains why the same 300 mg costs three times what it costs elsewhere.
4
Alpha GPC 300 mg
by Jarrow Formulas
8.0/10 desk score B+
- Form
- 9.0
- Disclosure
- 9.5
- Standardisation
- 7.0
- Cost per serving
- 6.5
- Buyer confidence
- 8.0
Pros
- Lists calcium phosphate under other ingredients rather than folding it into the active line, resolving the 50%-carrier ambiguity in the buyer's favour
- Long-established brand, stable formula, vegan capsule
Cons
- No purity percentage and no published lot-level result
- $0.67 per 300 mg, roughly double the cheapest option for an identical amount
The quiet strength is a labelling detail most shoppers never notice: keeping the carrier out of the active line makes it unambiguous that 300 mg means 300 mg of alpha-GPC. The price is high, with no lab paperwork to justify it.
5
Alpha-GPC 300 mg
by Swanson
7.8/10 desk score B
- Form
- 9.0
- Disclosure
- 9.0
- Standardisation
- 6.5
- Cost per serving
- 7.5
- Buyer confidence
- 7.5
Pros
- Prints "300 mg per capsule" on the pack, removing the commonest confusion in this category
- $0.52 per 300 mg, cheaper than three better-known brands; vegetarian capsule
Cons
- No purity figure or lot-level certificate; "one to two capsules daily" leaves the decision to the buyer with no stated basis
An unglamorous, correctly labelled bottle at a sensible price from a house brand that has been at this for decades. Nothing wrong with it and nothing remarkable about it, which here counts as a compliment. Fifth because the two above resolve something this label leaves open.
6
Alpha GPC 300 mg
by NOW
7.2/10 desk score B−
- Form
- 7.0
- Disclosure
- 8.5
- Standardisation
- 6.5
- Cost per serving
- 7.5
- Buyer confidence
- 8.0
Pros
- Family-owned since 1968 with its own testing laboratories — real institutional depth
- $0.50 per 300 mg, cheaper than several premium-positioned rivals, with an unusually thorough allergen statement
Cons
- The front says 300 mg and the panel says 600 mg per two-capsule serving. Both are true — the 300 mg is per capsule — but a shopper comparing packs reads them as the same kind of number
- Printed directions of two capsules twice daily come to 1,200 mg a day, otherwise seen in trials on adults with diagnosed cognitive impairment
- No purity percentage, no lot-level lab result
NOW is a serious manufacturer and this is a competent product at a fair price, which is why the criticism is narrow. Two things deserve a second look: the front-of-pack figure is per capsule while the panel figure is per serving, and the printed directions take a healthy adult past anything the healthy-adult literature has tested.
7
Alpha-GPC 300 mg
by Double Wood Supplements
7.0/10 desk score B−
- Form
- 7.5
- Disclosure
- 8.5
- Standardisation
- 6.0
- Cost per serving
- 9.0
- Buyer confidence
- 7.0
Pros
- $0.33 per 300 mg — cheap without looking cut-price
- A more careful warning block than several dearer rivals, including a stated daily ceiling
Cons
- Gelatin capsule, so not vegetarian — the only one here that is not
- No purity figure, no certificate; "take as needed" is not a schedule
Good value, honestly presented, with better safety copy than several dearer rivals manage. Two things hold it down: the gelatin capsule rules it out for a large slice of this category's buyers, and the label resolves nothing about the raw material.
8
Alpha GPC Capsules
by Nutricost
6.8/10 desk score C+
- Form
- 6.5
- Disclosure
- 8.0
- Standardisation
- 6.0
- Cost per serving
- 10
- Buyer confidence
- 7.0
Pros
- The cheapest alpha-GPC here at $0.23 per 300 mg, and it is not close
- Carries a third-party-tested seal; restricted to adults 18 and over
Cons
- The default serving is 600 mg, the top of the healthy-adult band, with no smaller schedule
- No certificate published against a lot number, so the seal cannot be checked
- No purity figure on the panel
On price nothing comes near it, and for a buyer who knows what they want that matters. The reservations are about what cannot be checked, not what is wrong: a seal is a claim, a certificate matched to a lot number is evidence.
The one thing worth taking away
Price and paperwork are not correlated here. The two dearest products publish less about their raw material than the cheapest publishes about its lot testing. A buyer who assumes the premium brand has done more checking will simply overpay.
What we make
Weal Focus is alpha-GPC 300 mg with lion's mane 400 mg at 100% fruiting body and beta-glucans of at least 25%, L-theanine 200 mg, zinc 15 mg and B12 500 mcg, as two size-00 capsules a day. Every amount printed, no proprietary blends. Not the cheapest way to buy alpha-GPC, as this page has now said three times.
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.