GI Sustain

GI Sustain

Metagenics4.8 (13 ratings)
Format:Powder Quantity: 1 Pound(s) · 14 servings
$96.95 $6.92 per serving
iHerbLowest$96.95Pure Formulas$96.95

Product analysis

43 out of 100

GI Sustain combines protein, vitamins, minerals and amino acids for someone seeking a broad nutrient mix in one supplement. Some forms and nutrient-mixture proportions are not disclosed, making detailed comparisons harder.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality32

Ingredient quality remains uncertain across the broad formula. Naming many forms does not provide enough information to establish how the preparations compare with alternatives.

Ingredient Transparency68

All listed amounts and many forms are disclosed, helping you compare the nutrient content. Several forms and the proportions of vitamin A, calcium and phosphorus mixtures are missing.

Value For Money39

The serving is costly when considered for its glutamine and offers limited value for glycine. Value for most other ingredients cannot be established, so those findings do not settle the value of the whole mix.

Customer Satisfaction71

Customer ratings are positive, but they come from a very small number of reviews. That limits confidence in how well the feedback represents customers generally.

Product Focus10

The formula combines a wide range of nutrients and amino acids. A specific digestive benefit or a clear contribution from each addition cannot be established.

Format
Powder
Container
1 Pound(s)
Per serving
$6.92
Customer rating
4.8 · 13 ratings
Report analysis

Ingredients

IngredientAmount per servingScore
Calories
170 Calorie(s)
Total Fat
5 Gram(s)
Total Carbohydrates
24 Gram(s)
Protein
13 Gram(s)
Vitamin A (Beta-Carotene, Retinyl Palmitate)
 1200 mcg
Vitamin C (Ascorbic Acid)
 102 mg
Vitamin D (Cholecalciferol)
 1.2 mcg
Vitamin E (D-Alpha-Tocopheryl Acetate)
 33.5 mg
Thiamine (Thiamine Hydrochloride)
 0.5 mg
Riboflavin
0.6 mg
Niacin (Niacinamide)
 10 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 0.7 mg
Folate (Calcium L-5-Methyltetrahydrofolate)
 235 mcg DFE
Vitamin B12 (Methylcobalamin)
 2.1 mcg
Biotin
105 mcg
Pantothenic Acid (Calcium D-Pantothenate)
 100 mg
Calcium (Calcium Citrate, Dicalcium Phosphate)
 300 mg
Iron (Ferrous Fumarate)
 3.6 mg
Phosphorus (Dicalcium Phosphate, Dipotassium Phosphate)
 180 mg
Magnesium (Magnesium Citrate)
 120 mg
Zinc (Zinc Gluconate)
 7.5 mg
Copper (Copper Gluconate)
 0.5 mg
Manganese
1.3 mg
Chromium (Chromium Picolinate)
 75 mcg
Sodium
20 mg
Potassium (Dipotassium Phosphate)
 300 mg
Isomaltooligosaccharides
3.4 Gram(s)
L-Glutamine
500 mg 50
Glycine
100 mg 24
DL-Methionine
100 mg
L-Lysine (L-Lysine Hydrochloride)
 35 mg
L-Threonine
34 mg
L-Cysteine (L-Cysteine Hydrochloride)
 25 mg
Gluten Free Adults 18–50
Report overview
Glutamine · 500 mg OverallScore50
B- Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value
Each serving provides 500 mg of L-glutamine, a small amount, at a very high cost for the amount. The amount is clearly stated, though no special grade is specified.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

The form is L-glutamine, with no special grade specified.
Glutamine Grade & Purity
The form is L-glutamine, with no special grade specified.

Dose, Safety & Label Transparency48

The label clearly states 500 mg of L-glutamine per serving.
Therapeutic Dosage Strength
The serving provides 500 mg, a small amount of L-glutamine.
Label Transparency & Blends
The label individually states 500 mg of L-glutamine per serving.

Value15

The cost is very high for the declared amount of glutamine.
Price per Gram of L-Glutamine
The cost per gram of glutamine is very high.
View ingredientView products
Glycine · 100 mg OverallScore24
F Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value
Each serving provides 100 mg of glycine, a small amount. The cost per gram of glycine is high. The available information does not establish a glycine purity certification or grade. Ordinary excipients or capsule materials are recorded, though their identities are unspecified.
How this ingredient is rated

Active Ingredient Quality & Bioavailability0

The available information does not establish a glycine purity certification or grade.
Glycine Sourcing and Purity Standards
The available information does not establish a glycine purity certification or grade.

Dose, Safety & Label Transparency46

Each serving provides 100 mg of glycine, a small amount. Ordinary excipients or capsule materials are recorded, though their identities are unspecified.
Clinically Relevant Dosage
Each serving provides 100 mg of glycine, a small amount.
Label Transparency and Yield Disclosure
The glycine amount is stated as 100 mg per serving.
Clean Label and Excipient Quality
Ordinary excipients or capsule materials are recorded, though their identities are unspecified.

Value30

The cost per gram of glycine is high.
Cost Efficiency per 1,000mg of Glycine
The cost per gram of glycine is high.
View ingredientView products
80 Performance

Theracurmin & L-Glutamine

Natural Factors CurcuminRich
The more focused or more substantial active profile improves on a costly gastrointestinal nutrition powder with modest glutamine and glycine for the candidate's stated use. Substantial micronized glutamine and enhanced-delivery curcumin create a concise gut-barrier and inflammatory-balance formula, but active curcuminoid yield is not supplied.
71 Performance

IntestiNew

Renew Life
The more focused or more substantial active profile improves on a costly gastrointestinal nutrition powder with modest glutamine and glycine for the candidate's stated use. A substantial glutamine serving forms a strong intestinal-support base with N-acetyl glucosamine, although an undisclosed herbal blend and unclear glucosamine sourcing reduce transparency.
85 Performance

Glycine Powder

Metabolic Maintenance
The more focused or more substantial active profile improves on a costly gastrointestinal nutrition powder with modest glutamine and glycine for the candidate's stated use. The single-ingredient powder is easy to assess and scale toward a multi-gram glycine intake, though no premium purity grade is stated.
84 Budget

L-Glutamine Pure Powder

Best Naturals
It lowers recurring cost compared with a costly gastrointestinal nutrition powder with modest glutamine and glycine while retaining a relevant amino-acid pathway. The scalable single-ingredient powder provides a substantial glutamine serving with simple active disclosure.
84 Budget

Glutamine Pure Powder 5000 mg (5 g)

Country Life
It lowers recurring cost compared with a costly gastrointestinal nutrition powder with modest glutamine and glycine while retaining a relevant amino-acid pathway. A full five-gram L-glutamine serving provides far stronger targeted dose depth than a mixed formula, although no premium purity or micronized claim is supplied.
82 Budget

L-Glutamine Powder

Bluebonnet
It lowers recurring cost compared with a costly gastrointestinal nutrition powder with modest glutamine and glycine while retaining a relevant amino-acid pathway. A substantial pure glutamine powder serving offers practical targeted use without the pill burden of a multi-capsule blend.
84 Value

Glutamine 300

PS ProSupps
Stronger active focus at no higher supplied serving cost improves value relative to a costly gastrointestinal nutrition powder with modest glutamine and glycine. A nearly full targeted glutamine serving gives the simple powder strong dose convenience, though no premium purity or micronized-processing claim is stated.
82 Value

Pharmaceutical Grade AjiPure L-Glutamine 500 mg

Swanson Ultra
Stronger active focus at no higher supplied serving cost improves value relative to a costly gastrointestinal nutrition powder with modest glutamine and glycine. AjiPure and pharmaceutical-grade labeling strengthen raw-material confidence, though the modest capsule amount requires several capsules for targeted use.
83 Value

Pharmaceutical Grade AjiPure Glycine 500 mg

Swanson Ultra
Stronger active focus at no higher supplied serving cost improves value relative to a costly gastrointestinal nutrition powder with modest glutamine and glycine. Branded pharmaceutical-grade glycine provides strong source-quality disclosure, but the half-gram capsule remains modest for multi-gram use.
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