Amino acids
L-glutamine
The most common amino acid in the body. Cells in the gut and the immune system use it as fuel – most people make enough themselves.
134 products from US online stores, sorted by what 5 g of glutamine costs – not by the price per pack.
$0.15Lowest cost
per 5 g glutamine
- Prices checked Nov 1, 2026, US
- No paid placements
What does 5 g mean?
- glutamine per serving in most of the products we checked
- 0.5–5 gglutamine per serving in most of the products we checked
- 5 g is about one serving: half of the 134 products we checked have up to 5 g per serving, the other half more.
- There’s no official daily amount for glutamine.
We compare by 5 g only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 134 products score
- Very good 90+: 21
- Good 75+: 111
- Fair 60+: 2
- Low under 60: 0
- have no seal from an independent testing program
- 84%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 13 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 5 g. Pick a size above to compare packs that are alike.
134 products · cheapest per 5 g glutamine first
- Rank 1
Nutricost
L-Glutamine, Unflavored
Powder
85Good qualityPacked in USA$0.15per 5 g
Lowest
- Pack
- $29.951 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
Amazing Nutrition
Amazing Formulas L-Glutamine Powder - Unflavored
Powder
80Good qualityMade in USA$0.17per 5 g
14% more
- Pack
- $33.99997 g (2.2 lb)997 servings
- Glutamine per serving
- 1 gin 1 g
- Pack lasts
- 199 daysif you take 5 g a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Micro Ingredients
L-Glutamine Powder-Optimal Health & Recovery
Powder
80Good qualityCountry not stated$0.18per 5 g
23% more
- Pack
- $36.95200 servings
- Glutamine per serving
- 5 g
- Pack lasts
- 200 daysif you take 5 g a day
microingredients.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Nutrex Research
Glutamine Pure, Unflavored
Powder
80Good qualityCountry not stated$0.19per 5 g
24% more
- Pack
- $37.011 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
Best Naturals
L-Glutamine Powder
Powder
80Good qualityMade in USA$0.19per 5 g
25% more
- Pack
- $16.99454 g (1 lb)91 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 90 daysif you take 5 g a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
NOW Foods
Sports, L-Glutamine Powder
Powder
80Good qualityPacked in USA$0.19per 5 g
26% more
- Pack
- $37.741 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
Vitamatic
L-Glutamine Powder Pouch
Powder
80Good qualityCountry not stated$0.19per 5 g
27% more
- Pack
- $18.99500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
BulkSupplements
L-Glutamine Powder
Powder
100Very good qualityCountry not stated$0.20per 5 g
33% more
- Pack
- $39.97200 servings
- Glutamine per serving
- 5 g
- Pack lasts
- 200 daysif you take 5 g a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Amazing Nutrition
Amazing Formulas L-Glutamine Powder
Powder
80Good qualityMade in USA$0.22per 5 g
47% more
- Pack
- $19.99454 g (1 lb)454 servings
- Glutamine per serving
- 1 gin 1 g
- Pack lasts
- 90 daysif you take 5 g a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
Amazing Nutrition
Amazing Muscle L-Glutamine Powder - Unflavored
Powder
80Good qualityMade in USA$0.22per 5 g
47% more
- Pack
- $19.99454 g (1 lb)91 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 90 daysif you take 5 g a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
Nutricost
L-Glutamine, Unflavored
Powder · 6 flavors: Blackberry Lemonade, Blue Raspberry, Fruit Punch +3 more
85Good qualityPacked in USA$0.23per 5 g
53% more
- Pack
- $22.95500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
MRM Nutrition
L-Glutamine 1000, Recovery
Powder
80Good qualityCountry not stated$0.23per 5 g
57% more
- Pack
- $46.991 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
California Gold Nutrition
Sport, L-Glutamine Powder, AjiPure, Gluten Free
Powder
80Good qualityCountry not stated$0.25per 5 g
65% more
- Pack
- $22.41454 g (1 lb)91 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 90 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
Kaged
Glutamine, Unflavored
Powder
100Very good qualityCountry not stated$0.25per 5 g
67% more
- Pack
- $24.99500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
ALLMAX
Essentials, Glutamine
Powder
100Very good qualityMade in USA$0.25per 5 g
67% more
- Pack
- $49.991 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Nutricost
L-Glutamine, Unflavored
Powder
85Good qualityPacked in USA$0.25per 5 g
67% more
- Pack
- $15.00300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
Kaged
Glutamine, Unflavored
Powder
100Very good qualityCountry not stated$0.25per 5 g
67% more
- Pack
- $24.99499 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 99 daysif you take 5 g a day
kaged.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
EVLution Nutrition
Glutamine5000, Unflavored
Powder
80Good qualityMade in USA$0.26per 5 g
72% more
- Pack
- $15.49300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
Sports Research
L-Glutamine, Unflavored
Powder
100Very good qualityCountry not stated$0.26per 5 g
73% more
- Pack
- $25.97500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
Nutricost
L-Glutamine Powder, Unflavored
Powder · 3 flavors: Blue Raspberry, Fruit Punch, Unflavored
85Good qualityMade in USA$0.26per 5 g
74% more
- Pack
- $25.97499 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 99 daysif you take 5 g a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Gaspari Nutrition
Glutamine, Unflavored
Powder
80Good qualityMade in USA$0.26per 5 g
77% more
- Pack
- $52.991 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Sports Research
L-Glutamine, Unflavored
Powder
100Very good qualityCountry not stated$0.27per 5 g
78% more
- Pack
- $15.97300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 23
Amazing Nutrition
Amazing Formulas L-Glutamine - Orange Flavor
Powder
78Good qualityMade in USA$0.27per 5 g
80% more
- Pack
- $19.99500 g (1.1 lb)74 servings
- Glutamine per serving
- 5 gin 6.75 g
- Pack lasts
- 74 daysif you take 5 g a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 24
MRM Nutrition
L-Glutamine 500
Powder
80Good qualityCountry not stated$0.27per 5 g
80% more
- Pack
- $26.99500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 25
Best Naturals
L-Glutamine
Powder
80Good qualityPacked in USA$0.27per 5 g
81% more
- Pack
- $24.55454 g (1 lb)91 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 90 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 26
NOW Foods
Sports, L-Glutamine Powder
Powder
80Good qualityPacked in USA$0.27per 5 g
81% more
- Pack
- $24.67454 g (1 lb)91 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 90 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 27
MuscleTech
Platinum 100% Glutamine
Powder
65Fair qualityMade in USA$0.28per 5 g
88% more
- Pack
- $16.99302 g (10.7 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
muscletech.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 28
MuscleTech
Platinum 100% Glutamine, Unflavored
Powder
65Fair qualityMade in USA$0.28per 5 g
89% more
- Pack
- $16.99300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 29
Primaforce
L-Glutamine Powder, Unflavored
Powder
80Good qualityCountry not stated$0.28per 5 g
90% more
- Pack
- $56.991 kg (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 200 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 30
BulkSupplements
L-Glutamine Powder
Powder
100Very good qualityCountry not stated$0.29per 5 g
93% more
- Pack
- $28.97100 servings
- Glutamine per serving
- 5 g
- Pack lasts
- 100 daysif you take 5 g a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 31
MRM Nutrition
L-Glutamine 325
Powder
80Good qualityCountry not stated$0.29per 5 g
95% more
- Pack
- $18.99325 g (11.5 oz)65 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 65 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 32
Sunwarrior
Sport, Active Glutamine, Unflavored
Powder
80Good qualityMade in USA$0.30per 5 g
100% more
- Pack
- $29.97500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 33
NutraBio
Glutamine
Powder
85Good qualityMade in USA$0.30per 5 g
100% more
- Pack
- $29.99500 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 100 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 34
NutraBio
Glutamine
Powder
85Good qualityMade in USA$0.30per 5 g
101% more
- Pack
- $29.99499 g (1.1 lb)100 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 99 daysif you take 5 g a day
nutrabio.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 35
Nutrex Research
Glutamine Pure
Powder
80Good qualityCountry not stated$0.30per 5 g
101% more
- Pack
- $59.99998 g (2.2 lb)200 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 199 daysif you take 5 g a day
nutrex.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 36
Body Fortress
100% Glutamine Powder
Powder
80Good qualityCountry not stated$0.31per 5 g
107% more
- Pack
- $18.69301 g (10.6 oz)67 servings
- Glutamine per serving
- 4.5 gin 4.5 g
- Pack lasts
- 60 daysif you take 5 g a day
bodyfortress.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 37
Doctor's Best
Pure L-Glutamine Powder
Powder
80Good qualityCountry not stated$0.32per 5 g
111% more
- Pack
- $18.99301 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
drbvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 38
Healthy Origins
L-Glutamine (American-Made)
Powder
80Good qualityPacked in USA$0.32per 5 g
111% more
- Pack
- $18.99301 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
healthyorigins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 39
Doctor's Best
Pure L-Glutamine Powder
Powder
80Good qualityCountry not stated$0.32per 5 g
111% more
- Pack
- $18.99300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 40
Healthy Origins
American-Made L-Glutamine
Powder
80Good qualityPacked in USA$0.32per 5 g
111% more
- Pack
- $18.99300 g (10.6 oz)60 servings
- Glutamine per serving
- 5 gin 5 g
- Pack lasts
- 60 daysif you take 5 g a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 1,837%more per 5 g for the most expensive product than for the cheapest.
- Fact
- 261%more per 5 g for the cheapest tablets 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.
Found a mistake or a product we should add? Email us