Amino acids
Agmatine sulfate
A substance the body makes from the amino acid arginine. It works as a messenger in the nerves – studies in people are few.
22 products from US online stores, sorted by what 500 mg of agmatine sulfate costs – not by the price per pack.
1.8¢Lowest cost
per 500 mg agmatine sulfate
- Prices checked Nov 1, 2026, US
- No paid placements
What does 500 mg mean?
- agmatine sulfate per serving in most of the products we checked
- 500–1,000 mgagmatine sulfate per serving in most of the products we checked
- 500 mg is a fixed amount to compare by: half of the 22 products we checked have up to 1,000 mg per serving, the other half more.
- There’s no official daily amount for agmatine sulfate.
We compare by 500 mg only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 22 products score
- Very good 90+: 0
- Good 75+: 22
- Fair 60+: 0
- Low under 60: 0
- have no seal from an independent testing program
- 100%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 7 whose label says “third-party tested”
The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.
We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works
Pack size
Compare packs of a similar size.
All sizes in one list can affect the results – big packs usually cost less per 500 mg. Pick a size above to compare packs that are alike.
22 products · cheapest per 500 mg agmatine sulfate first
- Rank 1
BulkSupplements
Agmatine Sulfate Powder
Powder
80Good qualityCountry not stated1.8¢per 500 mg
Lowest
- Pack
- $36.971,000 servings
- Agmatine sulfate per serving
- 1,000 mg
- Pack lasts
- 2,000 daysif you take 500 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
BulkSupplements
Agmatine Sulfate Powder
Powder
80Good qualityCountry not stated2.9¢per 500 mg
57% more
- Pack
- $28.97500 servings
- Agmatine sulfate per serving
- 1,000 mg
- Pack lasts
- 1,000 daysif you take 500 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
BulkSupplements
Agmatine Sulfate Powder
Powder
80Good qualityCountry not stated4.4¢per 500 mg
138% more
- Pack
- $21.97250 servings
- Agmatine sulfate per serving
- 1,000 mg
- Pack lasts
- 500 daysif you take 500 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Nutricost
Pure Agmatine Sulfate Powder
Powder
85Good qualityMade in USA5¢per 500 mg
171% more
- Pack
- $24.97249 g (8.8 oz)249 servings
- Agmatine sulfate per serving
- 1,000 mgin 1 g
- Pack lasts
- 498 daysif you take 500 mg a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
EVLution Nutrition
Agmatine750, Unflavored
Powder
80Good qualityMade in USA6¢per 500 mg
224% more
- Pack
- $8.9975 g (2.6 oz)100 servings
- Agmatine sulfate per serving
- 750 mgin 0.75 g
- Pack lasts
- 150 daysif you take 500 mg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
California Gold Nutrition
Sport, Agmatine Sulfate, Unflavored
Powder
80Good qualityMade in USA7.1¢per 500 mg
282% more
- Pack
- $14.13100 g (3.5 oz)100 servings
- Agmatine sulfate per serving
- 1,000 mgin 1 g
- Pack lasts
- 200 daysif you take 500 mg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
Nutricost
Agmatine, Unflavored
Powder
85Good qualityMade in USA7.5¢per 500 mg
304% more
- Pack
- $14.95100 g (3.5 oz)100 servings
- Agmatine sulfate per serving
- 1,000 mgin 1 g
- Pack lasts
- 200 daysif you take 500 mg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
California Gold Nutrition
Agmatine Sulfate, 750 mg
Capsules
80Good qualityMade in USA7.6¢per 500 mg
310% more
- Pack
- $13.65120 capsules
- Agmatine sulfate per serving
- 750 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (750 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Vitamatic
Agmatine Sulfate
Capsules
80Good qualityMade in USA8.3¢per 500 mg
351% more
- Pack
- $14.99180 capsules60 servings
- Agmatine sulfate per serving
- 1,500 mgin 3 capsules
- Pack lasts
- 180 daysif you take 1 capsule (500 mg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
Nutricost
Pure Agmatine Sulfate Powder
Powder
85Good qualityMade in USA8.6¢per 500 mg
364% more
- Pack
- $16.9799 g (3.5 oz)99 servings
- Agmatine sulfate per serving
- 1,000 mgin 1 g
- Pack lasts
- 198 daysif you take 500 mg a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
Vitamatic
Agmatine Sulfate
Capsules
80Good qualityCountry not stated8.7¢per 500 mg
373% more
- Pack
- $15.74180 capsules60 servings
- Agmatine sulfate per serving
- 1,500 mgin 3 capsules
- Pack lasts
- 180 daysif you take 1 capsule (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
EVLution Nutrition
Agmatine, Unflavored
Powder
80Good qualityMade in USA$0.10per 500 mg
441% more
- Pack
- $14.9975 g (2.6 oz)100 servings
- Agmatine sulfate per serving
- 750 mgin 0.75 g
- Pack lasts
- 150 daysif you take 500 mg a day
evlnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
Primaforce
Agmatine, Unflavored
Powder
80Good qualityCountry not stated$0.10per 500 mg
447% more
- Pack
- $20.21100 g (3.5 oz)133 servings
- Agmatine sulfate per serving
- 750 mgin 0.75 g
- Pack lasts
- 200 daysif you take 500 mg a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
BulkSupplements
Agmatine Sulfate Powder
Powder
80Good qualityCountry not stated$0.10per 500 mg
467% more
- Pack
- $20.97100 servings
- Agmatine sulfate per serving
- 1,000 mg
- Pack lasts
- 200 daysif you take 500 mg a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
Primaforce
Agmatine Powder
Powder
80Good qualityCountry not stated$0.11per 500 mg
509% more
- Pack
- $22.50100 g (3.5 oz)133 servings
- Agmatine sulfate per serving
- 750 mgin 0.75 g
- Pack lasts
- 200 daysif you take 500 mg a day
primaforce.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Nutricost
Agmatine Sulfate
Capsules
85Good qualityMade in USA$0.12per 500 mg
529% more
- Pack
- $13.95120 capsules60 servings
- Agmatine sulfate per serving
- 1,000 mgin 2 capsules
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
BulkSupplements
Agmatine Sulfate Capsules
Capsules
80Good qualityMade in USA$0.12per 500 mg
560% more
- Pack
- $21.96180 capsules90 servings
- Agmatine sulfate per serving
- 1,000 mgin 2 capsules
- Pack lasts
- 180 daysif you take 1 capsule (500 mg) a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
Swanson Vitamins
Agmatine Sulfate
Capsules
80Good qualityCountry not stated$0.13per 500 mg
616% more
- Pack
- $10.3260 capsules
- Agmatine sulfate per serving
- 650 mgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (650 mg) a day
swansonvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
Nutricost
Agmatine Sulfate Capsules
Capsules
85Good qualityCountry not stated$0.13per 500 mg
620% more
- Pack
- $15.97120 capsules60 servings
- Agmatine sulfate per serving
- 1,000 mgin 2 capsules
- Pack lasts
- 120 daysif you take 1 capsule (500 mg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
Primaforce
Agmatine Sulfate, 500 mg
Capsules
85Good qualityCountry not stated$0.15per 500 mg
720% more
- Pack
- $13.6490 capsules
- Agmatine sulfate per serving
- 500 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Primaforce
Agmatine Sulfate Capsules
Capsules
85Good qualityCountry not stated$0.19per 500 mg
921% more
- Pack
- $16.9990 capsules
- Agmatine sulfate per serving
- 500 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (500 mg) a day
primaforce.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Olympian Labs
Agmatine Sulfate
Capsules
80Good qualityMade in USA$0.98per 500 mg
5,202% more
- Pack
- $29.4060 capsules30 servings
- Agmatine sulfate per serving
- 500 mgin 2 capsules
- Pack lasts
- 30 daysif you take 2 capsules (500 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 5,202%more per 500 mg for the most expensive product than for the cheapest.
- Fact
- 310%more per 500 mg for the cheapest capsules than for the cheapest powder.
How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check
The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.
How we calculate
Cost per dose = price ÷ (servings × amount per serving) × comparison amount. Example: $119.99 for 74 servings with 24 g of protein each is 1,776 g of protein. $119.99 ÷ 1,776 g × 30 g = $2.03 per 30 g of protein.
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