L-Cysteine 500 mg

L-Cysteine 500 mg

California Gold Nutrition4.6 (2,022 ratings)
Format:Capsule Quantity: 60 Capsule(s) · 60 servings
$14.40 $0.24 per serving
iHerbLowest$14.40Amazon$18.22

Product analysis

57 out of 100

L-Cysteine 500 mg offers a simple cysteine supplement with favorable value for its declared amount. The ingredient declaration leaves its exact form unspecified.

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

Nutrient Quality20

The cysteine form is not identified in the ingredient declaration. Its comparative form quality therefore remains uncertain.

Ingredient Transparency63

Ingredient amounts are disclosed, but their forms are not identified. That leaves less detail for comparing nutrient sources.

Value For Money100

Cysteine provides favorable value for the declared amount. That cost advantage does not by itself establish quality or a particular health benefit.

Customer Satisfaction82

Customer ratings are strongly positive. The larger review base gives a broader picture of customer satisfaction.

Product Focus40

A specific expected health benefit cannot be established from the information available. The ingredient list alone does not show how well the supplement meets a particular need.

Format
Capsule
Container
60 Capsule(s)
Per serving
$0.24
Customer rating
4.6 · 2,022 ratings
Report analysis

Ingredients

IngredientAmount per servingScore
L-Cysteine
500 mg 81
Gluten Free Adults 18–50 Dairy Free
Report overview
Cysteine · 500 mg OverallScore81
C Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value
Each serving provides 500 mg of L-Cysteine, and the estimated cost for its cysteine amount is low. The amount is stated separately.
How this ingredient is rated

Active Ingredient Quality & Bioavailability60

The cysteine is supplied as L-Cysteine.
Cysteine Form Quality & Stability
The cysteine is supplied as L-Cysteine.

Dose, Safety & Label Transparency92

Each serving provides 500 mg of cysteine. The cysteine amount is stated separately.
Cysteine Dosage Potency
Each serving provides 500 mg of cysteine.
Ingredient Transparency & Blend Disclosure
The cysteine amount is stated separately.

Value100

The estimated cost for the amount of cysteine is low.
Price per 500mg of Cysteine
The estimated cost for the amount of cysteine is low.
View ingredientView products
91 Performance

L-Cysteine 500 mg

Bluebonnet
The hydrochloride form provides a stable cysteine source; its cysteine quality and focus provide a clearer option when the original uses base cysteine with less stability detail than a hydrochloride salt. The cysteine amount is substantial for targeted supplementation.
79 Performance

Vegan Hair Skin & Nails

NOW Solutions
Chelated minerals, structural amino acids, hyaluronic acid, and antioxidant vitamins form a coherent hair, skin, and nail formula with good serving value; it offers broader hair or nutrient support rather than a focused cysteine upgrade. High-dose biotin and horsetail without silica standardization are the main limitations; Biotin can distort thyroid, hormone, and cardiac blood tests, so use should be disclosed before laboratory work.
74 Performance

Hair Skin & Nails

Swanson
MSM, well-identified horsetail, cysteine, choline, and PABA form a coherent beauty-focused blend at a low serving cost; it offers broader hair or nutrient support rather than a focused cysteine upgrade. Modest cysteine, choline, and PABA amounts limit depth, while excellent review volume supports confidence in general satisfaction.
89 Budget

L-Cysteine 500 mg

NOW
The hydrochloride form provides a stable cysteine source; the lower serving cost improves economy when the original uses base cysteine with less stability detail than a hydrochloride salt. The cysteine amount is substantial for targeted supplementation.
90 Budget

L-Cysteine 500 mg

Solgar
The hydrochloride form provides a stable cysteine source; the lower serving cost improves economy when the original uses base cysteine with less stability detail than a hydrochloride salt. The cysteine amount is substantial for targeted supplementation.
93 Budget

L-Cysteine Powder

Source Naturals
The hydrochloride form provides a stable cysteine source; the lower serving cost improves economy when the original uses base cysteine with less stability detail than a hydrochloride salt. The cysteine amount is substantial for targeted supplementation.
64 Value

Hair Volume

New Nordic
Biotin, apple procyanidins, zinc, copper, horsetail, cysteine, and methionine form a broad hair-focused blend; it serves a broader goal but does not clearly improve value over the original. Basic mineral forms and modest amino-acid amounts limit depth, while concentrated biotin can interfere with several laboratory tests.
64 Value

Ultimate Hair & Nail Formula

Bluebonnet
A broad nutrient blend uses several useful forms, but many hair-focused amino acids and botanicals are modest; it serves a broader goal but does not clearly improve value over the original. The combined vitamin A amount and long-term vitamin B6 exposure are concerns for routine daily use; Formula breadth offers some value, though several small additions dilute the focus.
58 Value

Cell Formula

Nature's Way
The broad antioxidant blend uses several good nutrient forms, but cysteine makes only a small contribution and some antioxidant amounts are aggressive; it serves a broader goal but does not clearly improve value over the original. The high beta-carotene amount creates a specific concern for current or former smokers.
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