L-Cysteine 500 mg
Bluebonnet
L-Cysteine 500 mg
4.5
★ ★ ★ ★ ★
(442 ratings)
Cysteine 500 mg
Score 80.0
A reliable 500mg L-Cysteine capsule from a trusted brand, offering convenience for general immune, detoxification, skin, and hair support, though better value options exist.
Quantity: 60 Capsule(s)Servings size: 1 Capsule(s) (60 servings)
Selected goals:
Other goals:
Immunity
Detoxification
Skin Health
Hair Health
leaderboard Score 80.0
A reliable 500mg L-Cysteine capsule from a trusted brand, offering convenience for general immune, detoxification, skin, and hair support, though better value options exist.
insights Analysis
Bluebonnet L-Cysteine 500 mg delivers a widely accepted dosage of L-Cysteine Hydrochloride in an easy-to-take capsule format. This convenience makes it a practical choice for daily supplementation, eliminating the preparation needed for powder forms. At $0.22 per serving, its cost-effectiveness is decent, though other strong competitors like NOW L-Cysteine (ID: 139642) offer 500mg plus synergistic vitamins (C and B6) at a significantly lower price point ($0.12/serving). Bluebonnet is a reputable brand known for quality, and this product effectively supports glutathione synthesis, which is beneficial for immunity, detoxification, and the structural health of hair and skin. Online reviews generally reflect satisfaction with its efficacy.
- Convenient and easy-to-take capsule form.
- Provides a standard and effective 500mg L-Cysteine dose.
- From a reputable brand known for quality supplements.
- Higher price per serving compared to some equally effective or superior 500mg L-Cysteine alternatives.
- Does not include synergistic cofactors like Vitamin C or B6 that can enhance L-Cysteine's efficacy.
- L-Cysteine may interact with certain medications, including those for heart conditions or blood pressure; consult a healthcare professional before starting supplementation.
$13.60($0.22 per serving)
 Daily Vita | $ 13.60 | |
 Pure Formulas | $ 20.40 | |
 iHerb | $ 20.40 | |
| Daily Vita | $ 20.40 | |
 Amazon | $ 20.40 |
bolt Effectiveness for goals
Cysteine is a precursor to glutathione, one of the body's most powerful antioxidants. By supporting glutathione levels, it helps protect cells from oxidative damage caused by free radicals. This contributes to overall cellular health and function.
Cysteine's effectiveness in reducing oxidative stress stems from its role as a precursor to glutathione, a major endogenous antioxidant. By boosting glutathione levels, it helps scavenge free radicals and mitigate cellular damage. This process is fundamental to maintaining cellular integrity.
Cysteine is a semi-essential amino acid, meaning the body can produce it from other amino acids like methionine, but it can also be obtained through diet or supplements. It plays a crucial role in protein synthesis and various metabolic functions. Cysteine is a precursor to glutathione, a powerful antioxidant.
As N-acetylcysteine (NAC), a derivative of Cysteine, it is widely recognized for its mucolytic properties. It helps thin mucus in the airways, making it easier to clear. This action can support the health of the respiratory tract.
Cysteine is a key component of glutathione, one of the body's most important antioxidants. By providing the building block for glutathione synthesis, Cysteine helps the body combat oxidative stress. This action supports cellular health and protection against free radicals.
schedule Dosage, timing & forms
L-Cysteine is the naturally occurring amino acid, while NAC is a modified form of Cysteine that has an acetyl group attached. NAC is generally more stable and better absorbed by the body, making it a more popular choice for supplementation. Both forms serve as precursors to glutathione.
L-Cysteine is an amino acid, while N-Acetyl Cysteine (NAC) is a modified form of L-Cysteine with an acetyl group attached. NAC is generally preferred as a supplement because it is more stable and better absorbed by the body. It also serves as an efficient precursor for glutathione synthesis, which is a key antioxidant.
The most common and widely available supplemental form is N-Acetyl Cysteine (NAC), which is a precursor to L-Cysteine and glutathione. L-Cysteine is also available, often found in combination supplements. These forms differ in their chemical structure and how they are utilized by the body.
The most common supplemental form of Cysteine is N-acetyl Cysteine, often abbreviated as NAC. L-Cysteine is another form available in supplements, but NAC is generally preferred due to its higher bioavailability and stability. These forms are typically found in capsules, tablets, or powders.
While specific upper limits can vary by individual and product, daily doses of N-Acetyl Cysteine (NAC) typically do not exceed 1800 mg for general use without medical supervision. Much higher doses have been used in clinical settings, but this is always under the guidance of a healthcare professional. Adhering to label instructions is crucial.
health_and_safety Safety & interactions
Yes, Cysteine, particularly NAC, may interact with certain medications. It could potentially enhance the effects of vasodilators like nitroglycerin, leading to low blood pressure. It may also interact with some immunosuppressants or blood thinners, so consult a doctor if taking such medications.
Cysteine, especially N-acetylcysteine (NAC), is generally well-tolerated. Some individuals may experience mild gastrointestinal upset, such as nausea, vomiting, or diarrhea. Less common side effects can include skin rashes or headache.
There isn't a universally established "safe upper limit" for Cysteine or NAC for the general population. Doses used in clinical studies vary significantly, often ranging from 600 mg to several grams daily for specific conditions. Exceeding product label recommendations without professional guidance is not advised.
While Cysteine is naturally present in the body, supplemental use during pregnancy or breastfeeding requires caution. Limited research exists on high-dose Cysteine supplementation specifically in these populations. Individuals should consult a healthcare provider before use.
Individuals with certain pre-existing conditions, such as asthma (especially sulfite sensitivity), should use Cysteine (NAC) with caution. Those prone to kidney stones, particularly cysteine stones, should consult a doctor before supplementing. High doses may also be a concern for individuals with bleeding disorders.
Ingredients
| Ingredient | Amount per serving |
|---|---|
| L-Cysteine (L-Cysteine Hydrochloride) | 500 mg |
Categories
Cysteine 90.0
This product delivers a focused and effective dosage of L-Cysteine, making it a reliable choice for individuals specifically seeking the benefits of Cysteine supplementation.
Goals
Immunity 88.0
The 500mg L-Cysteine dose adequately supports glutathione synthesis, which is beneficial for maintaining a healthy immune system and cellular protection against oxidative stress.
Detoxification 88.0
This dosage is sufficient to act as a crucial precursor for glutathione, aiding the liver in its detoxification processes by supporting the neutralization and elimination of various metabolic byproducts and environmental toxins.
Skin Health 85.0
L-Cysteine contributes to skin health by providing a building block for keratin and supporting the body's antioxidant defenses, which can help protect skin cells from damage and promote overall vitality.
Recommended Alternatives
95 Value 
L-Cysteine 500 mg
NOW
4.4
★★★★★
(18851 ratings)
Provides the same core L-Cysteine benefit, plus essential co-factors, at a significantly reduced price per serving, offering exceptional overall value.
75 Value 
L-Cysteine 500 mg
Solgar
4.5
★★★★★
(1545 ratings)
While still a pure L-Cysteine product, Solgar provides a more cost-effective option (21 cents vs 34 cents per serving) for the same dose and quality, thus offering better value.
80 Value 
Hair Skin & Nails
Swanson
4.7
★★★★★
(3284 ratings)
Offers a multi-ingredient approach to hair and skin support, including L-Cysteine, MSM, and Horsetail, at a very low price per serving (11 cents), representing superior value for broader beauty benefits.
98 Performance 
Hair Force
KAL
4.5
★★★★★
(257 ratings)
Delivers 500mg L-Cysteine within an extensive blend of vitamins, minerals, and herbal extracts specifically designed for superior hair and overall beauty support, offering a far more comprehensive solution.
92 Performance 
Vegan Hair Skin & Nails
NOW Solutions
4.7
★★★★★
(3911 ratings)
Combines L-Cysteine (250mg) with highly beneficial co-factors like MSM, Hyaluronic Acid, and Biotin, providing a more comprehensive and synergistic approach to skin and hair health.
95 Performance
L-Cysteine 500 mg
NOW
4.4
★★★★★
(18851 ratings)
Its inclusion of Vitamin C and B6 alongside the 500mg L-Cysteine dose makes it functionally superior for supporting collagen synthesis and L-Cysteine metabolism compared to a pure L-Cysteine product.
95 Budget
L-Cysteine 500 mg
NOW
4.4
★★★★★
(18851 ratings)
Offers the exact same 500mg L-Cysteine dose plus beneficial Vitamin C and B6, but at a dramatically lower price per serving (11 cents vs 34 cents), representing superior value.
75 Budget
L-Cysteine 500 mg
Solgar
4.5
★★★★★
(1545 ratings)
Provides the same 500mg L-Cysteine dose from a reputable brand at a notably lower price per serving (21 cents), making it a more cost-effective pure L-Cysteine option.
70 Budget 
L-Cysteine 500 mg
California Gold Nutrition
4.6
★★★★★
(1735 ratings)
Offers the same 500mg L-Cysteine dose at a slightly more competitive price per serving (30 cents vs 34 cents), making it a marginally cheaper alternative with similar benefits.
95 Value
L-Cysteine 500 mg
NOW
4.4
★★★★★
(18851 ratings)
Provides the same core L-Cysteine benefit, plus essential co-factors, at a significantly reduced price per serving, offering exceptional overall value.
75 Value
L-Cysteine 500 mg
Solgar
4.5
★★★★★
(1545 ratings)
While still a pure L-Cysteine product, Solgar provides a more cost-effective option (21 cents vs 34 cents per serving) for the same dose and quality, thus offering better value.
80 Value
Hair Skin & Nails
Swanson
4.7
★★★★★
(3284 ratings)
Offers a multi-ingredient approach to hair and skin support, including L-Cysteine, MSM, and Horsetail, at a very low price per serving (11 cents), representing superior value for broader beauty benefits.
98 Performance
Hair Force
KAL
4.5
★★★★★
(257 ratings)
Delivers 500mg L-Cysteine within an extensive blend of vitamins, minerals, and herbal extracts specifically designed for superior hair and overall beauty support, offering a far more comprehensive solution.
92 Performance
Vegan Hair Skin & Nails
NOW Solutions
4.7
★★★★★
(3911 ratings)
Combines L-Cysteine (250mg) with highly beneficial co-factors like MSM, Hyaluronic Acid, and Biotin, providing a more comprehensive and synergistic approach to skin and hair health.
95 Performance
L-Cysteine 500 mg
NOW
4.4
★★★★★
(18851 ratings)
Its inclusion of Vitamin C and B6 alongside the 500mg L-Cysteine dose makes it functionally superior for supporting collagen synthesis and L-Cysteine metabolism compared to a pure L-Cysteine product.