L-Glutamine
Capsules and powders are ranked separately: each has its own table, and neither is priced against the other.
Powder
How these lines are chosen
Among 27 products and 27 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of the size in the heading, priced the same way as the per-dose figure beside it. “Delivery known” ranks only products whose retailer publishes a delivery rate; a cheaper product with an unpublished rate is on its own line, or in the full list below.
Why this pick, and what's cheaper
Not a score, no weightings to argue with. It is the cheapest per delivered dose among products clearing four factual bars (a certification we confirmed applies to this package, naming it where the certifier names packages; no recall, warning letter or failed test in the sources we checked; a price its retailer let us read within its cache limit; no more than a year's supply at the label's serving) and whose delivery cost we actually know. It is provisional: it is the best answer within the products, retailers and sources we have actually checked, and that universe is still narrow.
Capsules, softgels and tablets
How these lines are chosen
Among 5 products and 5 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of the size in the heading, priced the same way as the per-dose figure beside it. “Delivery known” ranks only products whose retailer publishes a delivery rate; a cheaper product with an unpublished rate is on its own line, or in the full list below.
A pick has to be independently certified, at the exact package sold where the certifier names packages, with no recall or failed test, a price its retailer let us read recently, and no more than a year’s supply at the label’s serving. Where a retailer does not publish a delivery rate, the pick is priced before delivery and says so. These came closest, with what stopped each one:
“Delivery cost is not published” usually means the retailer only publishes a free-delivery threshold and no rate below it. An order that reaches the threshold clears it. We cannot price that cart for you, so we show the gap instead of guessing.
Powders and capsules are each ranked on their own, priced per 5 g of L-glutamine as each panel prints it. The 5 g is a yardstick for comparing prices, not a suggested dose.
Prices are checked daily where a store can be read automatically; Sports Research is read by hand, less often, and a price past its date says so. Every figure links to its source. Where the data comes from
Of the 32 products here: 6 named at the exact package by a certifier, 2 certified with no package named, 18 in no database we searched, 6 not settled.
| Product | Delivery | |||||
|---|---|---|---|---|---|---|
NUTR | $0.165 $4.95/mo + delivery | D · None located Could not locate independent data | $32.97 checked today | not free $26.03 short | 200 6.6 months at 1/day | Buy Nutricost (direct) |
MI | $0.185 $5.54/mo + delivery | D · None located Could not locate independent data | $36.95 checked today | not free $22.05 short | 200 6.6 months at 1/day | Buy Micro Ingredients (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Unflavored (1 kg) powder · 1000 g · 5g per serving · 2.00 per dose | $0.20 $6.00/mo + delivery | D · Not settled A certifier’s entry may cover this package | $39.97 checked today | not free $19.03 short | 200 6.6 months at 1/day | Buy BulkSupplements.com |
SR | $0.249 $7.49/mo | B · Informed Sport Independently tested | $14.97 checked today | $7.50 | 60 60 days at 1/day | Buy Sports Research (direct) |
DWS | $0.249 $7.49/mo + delivery | D · None located Could not locate independent data | $24.95 checked today | not free $5.05 short | 100 3.3 months at 1/day | Buy Double Wood Supplements (direct) |
NUTR | $0.26 $7.79/mo + delivery | D · None located Could not locate independent data | $25.97 checked today | not free $33.03 short | 100 3.3 months at 1/day | Buy Nutricost (direct) |
SR | $0.279 $8.38/mo | B · Informed Sport Independently tested | $27.95 checked today | $7.50 | 100 3.3 months at 1/day | Buy Sports Research (direct) |
MUSC | $0.283 $8.49/mo + delivery | D · None located Could not locate independent data | $16.99 checked today | not free $13.01 short | 60 60 days at 1/day | Buy MuscleTech (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Unflavored (500 g) powder · 500 g · 5g per serving · 2.00 per dose | $0.29 $8.69/mo + delivery | D · Not settled A certifier’s entry may cover this package | $28.97 checked today | not free $30.03 short | 100 3.3 months at 1/day | Buy BulkSupplements.com |
ON | $0.332 $9.97/mo | D · Not settled A certifier’s entry may cover this package | $64.49 checked today | $5.99 | 194 6.4 months at 1/day | Buy Optimum Nutrition (direct) |
NUTR | $0.337 $10.11/mo + delivery | D · None located Could not locate independent data | $27.97 checked today | not free $31.03 short | 83 83 days at 1/day | Buy Nutricost (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Mango Tango (700 g) powder · 700 g · 5g per serving · 3.00 per dose | $0.34 $10.19/mo + delivery | A · NSF Certified for Sport Independently certified | $33.97 checked today | not free $25.03 short | 100 3.3 months at 1/day | Buy BulkSupplements.com |
BULK BulkSupplements.com L-Glutamine Powder, Lemon Italian Ice (700 g) powder · 700 g · 5g per serving · 3.00 per dose | $0.34 $10.19/mo + delivery | A · NSF Certified for Sport Independently certified | $33.97 checked today | not free $25.03 short | 100 3.3 months at 1/day | Buy BulkSupplements.com |
BULK BulkSupplements.com L-Glutamine Powder, Sour Apple (700 g) powder · 700 g · 5g per serving · 3.00 per dose | $0.34 $10.19/mo + delivery | A · NSF Certified for Sport Independently certified | $33.97 checked today | not free $25.03 short | 100 3.3 months at 1/day | Buy BulkSupplements.com |
NUTR | $0.341 $10.23/mo + delivery | D · None located Could not locate independent data | $27.97 checked today | not free $31.03 short | 82 82 days at 1/day | Buy Nutricost (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Orange Smash (700 g) powder · 700 g · 5g per serving · 3.00 per dose | $0.35 $10.49/mo + delivery | A · NSF Certified for Sport Independently certified | $34.97 checked today | not free $24.03 short | 100 3.3 months at 1/day | Buy BulkSupplements.com |
NUTR | $0.359 $10.76/mo + delivery | D · None located Could not locate independent data | $27.97 checked today | not free $31.03 short | 78 78 days at 1/day | Buy Nutricost (direct) |
NUTR | $0.359 $10.76/mo + delivery | D · None located Could not locate independent data | $27.97 checked today | not free $31.03 short | 78 78 days at 1/day | Buy Nutricost (direct) |
NUTR | $0.359 $10.78/mo + delivery | D · None located Could not locate independent data | $17.97 checked today | not free $41.03 short | 50 50 days at 1/day | Buy Nutricost (direct) |
EN | $0.366 $10.99/mo + delivery | D · None located Could not locate independent data | $21.99 checked today | not free $57.01 short | 60 60 days at 1/day | Buy EVLution Nutrition (direct) |
NUTR | $0.368 $11.04/mo + delivery | D · None located Could not locate independent data | $27.97 checked today | not free $31.03 short | 76 76 days at 1/day | Buy Nutricost (direct) |
EN | $0.416 $12.47/mo + delivery | D · None located Could not locate independent data | $24.95 checked today | not free $100.05 short | 60 60 days at 1/day | Buy Evogen Nutrition (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Unflavored (250 g) powder · 250 g · 5g per serving · 2.00 per dose | $0.479 $14.38/mo + delivery | D · Not settled A certifier’s entry may cover this package | $23.97 checked today | not free $35.03 short | 50 50 days at 1/day | Buy BulkSupplements.com |
ON | $0.491 $14.74/mo | D · Not settled A certifier’s entry may cover this package | $28.49 checked today | $5.99 | 58 58 days at 1/day | Buy Optimum Nutrition (direct) |
MOME | $0.667 $20.00/mo + delivery | A · NSF Certified for Sport Independently certified | $39.99 checked today | not free | 60 60 days at 1/day | Buy Momentous (direct) |
THOR | $0.744 $22.33/mo | A · NSF Certified for Sport Independently certified | $67.00 checked today | free | 90 3.0 months at 1/day | Buy Thorne (direct) |
BULK BulkSupplements.com L-Glutamine Powder, Unflavored (100 g) powder · 100 g · 5g per serving · 2.00 per dose | $1.05 $31.45/mo + delivery | D · Not settled A certifier’s entry may cover this package | $20.97 checked today | not free $38.03 short | 20 20 days at 1/day | Buy BulkSupplements.com |
| Product | Delivery | |||||
|---|---|---|---|---|---|---|
BULK | $0.433 $12.98/mo + delivery | D · None located Could not locate independent data | $25.97 checked today | not free $33.03 short | 60 60 days at 1/day | Buy BulkSupplements.com |
NUTR Nutricost L-Glutamine 800 mg (180 capsules) capsule · 0.8g per serving · 6.25 per dose Second active this price does not pay for: acacia fiber (Acacia senegal) (gum) 30 mg | $0.624 $18.72/mo + delivery | D · None located Could not locate independent data | $17.97 checked today | not free $41.03 short | 180 = 29 doses 29 days at 1/day | Buy Nutricost (direct) |
ON | $0.958 $28.74/mo | D · None located Could not locate independent data | $22.99 checked today | $5.99 | 120 = 24 doses 24 days at 1/day | Buy Optimum Nutrition (direct) |
DWS Double Wood Supplements L-Glutamine 1,000 mg (120 capsules) capsule · 1g per serving · 10.00 per dose | $1.25 $37.38/mo + delivery | D · None located Could not locate independent data | $14.95 checked today | not free $15.05 short | 60 = 12 doses 12 days at 1/day | Buy Double Wood Supplements (direct) |
THOR | $2.89 $86.67/mo | C · Claimed Claimed, not confirmed | $26.00 checked today | free | 90 = 9 doses 9 days at 1/day | Buy Thorne (direct) |
Common questions
About these numbers
What “per dose” means here: 5g L-glutamine
NIH Office of Dietary Supplements notes that an adult takes in about 3 to 6 g of glutamine a day from protein-containing foods. 5 g is a round figure inside that range, chosen so packages of different serving sizes can be priced on one basis. It is a yardstick for comparing prices, not a recommended intake, and it cannot change which product is cheapest: it scales every row by the same number. Packages are ranked one format at a time and never across formats. Adopted on October 30, 2026, when the category was built.
Compared on the grams of L-glutamine the Supplement Facts panel prints, never on a scoop or capsule weight. N-acetyl L-glutamine and glutamine peptides are different compounds and are not entered here, and neither are formulas sold for another purpose in which glutamine is one ingredient among several. A glutamine product whose panel also prints a second dietary ingredient with its own amount is entered and marked, as elsewhere on this site.
Where the data comes from
- Where a servings-per-container figure was not read from the package's own panel, the product page says how it was worked out.
- Amazon and Walmart are not included, so “cheapest” means cheapest among the retailers we track.
- Prices go stale. Each one shows when it was last checked, and says so when it is older than the retailer allows us to cache it.
- iHerb prices cannot be refreshed automatically. iHerb has not given us access to its price data, so those prices are marked stale until they are re-read. Each retailer offer carries its own check date.
How we make money
No Buy button on this page earns us anything. Where a link elsewhere on the site can, it says so beside the link.
Commission will play no part in what we list, how it ranks, or which link we send you to. The Buy button points at the lowest price we have recorded even when that retailer pays us nothing.