SuppHelper
search
Home›Supplements›Amino Acid›Cysteine›L-Cysteine Powder Source Naturals
Product Image

L-Cysteine Powder

Source Naturals
4.3
★ ★ ★ ★ ★
(170 ratings)
Cysteine 900 mg
Product Image
Score 85

Source Naturals L-Cysteine Powder offers a flexible, higher-dose alternative for those seeking this amino acid to support antioxidant function.

Quantity: 3 Ounce(s) • (83 servings)
Goals:
flag Anti-Aging

leaderboard Score 85

Source Naturals L-Cysteine Powder offers a flexible, higher-dose alternative for those seeking this amino acid to support antioxidant function.

insightsAnalysis

This Source Naturals product delivers L-Cysteine in a powder form, offering flexibility in dosing and consumption, as it can be mixed into drinks or food. L-Cysteine itself is a sulfur-containing amino acid that may help support the body's natural antioxidant defenses by facilitating glutathione production.

At 900mg per serving, it provides a notably higher dose than most capsule alternatives, which can be useful for individuals looking for more substantial intake. This amino acid is important for cellular health and can contribute to overall wellness.

The powder format may be appealing to those who prefer to avoid capsules or want to adjust their intake precisely. It can contribute to overall vitality, especially in areas like skin and hair health, often considered part of an anti-aging regimen.

thumb_upPros
  • Higher dose per serving (900 mg) compared to 500mg capsules.
  • Powder form allows for flexible dosing and mixing.
  • Good value per serving for the given dosage.
  • Explicitly states 'L-Cysteine Hydrochloride Monohydrate' form.
  • Can be a good option for those who dislike swallowing capsules.
thumb_downCons
  • Powder form might be less convenient for travel or quick consumption.
  • Taste of L-Cysteine powder can be strong or unpalatable for some.
  • Requires measuring, which might be less precise than a pre-dosed capsule.
  • Lower review count compared to some capsule alternatives.
warningWarnings
  • L-Cysteine powder can have a distinctive, sulfurous taste; consider mixing it with strong-flavored juices or smoothies to mask it.
  • Ensure accurate measurement to get the intended dose, as consistency is key for results.
  • Consult a healthcare professional, particularly if taking other supplements or medications, due to the higher dosage.
flagReport analysis
$18.51($0.22 per serving)
Amazon
$ 18.51
iHerb
$ 18.77
Vitacost
$ 18.89
flagReport prices

Ingredients

IngredientAmount per serving
L-Cysteine
900 mg
grain_off Gluten Free person Adults 18–50 free_breakfast Dairy Free Sugar Free
flagReport overview

Categories

Cysteine 88
As a pure L-Cysteine product, it strongly aligns with the Cysteine collection, offering a substantial amount of the amino acid in a specified form for those focused on this specific supplement. The powder format offers versatility.
storefront View products

Goals

flag Anti-Aging 84
The higher dose of L-Cysteine can contribute significantly to supporting glutathione synthesis, which plays a key role in protecting cells from oxidative stress and maintaining overall cellular vitality, relevant for anti-aging goals. Its impact on skin and hair health further supports this.
inventory_2Recommended products
95 Value

L-Cysteine 500 mg

NOW
4.4
★★★★★
(19931 ratings)
Delivers an optimal L-Cysteine dose with added Vitamin C and B6 at a fraction of the cost per serving, making it an undeniable leader in value compared to the extremely expensive powder.
Other sellers (4)
75 Value

L-Cysteine 500 mg

Solgar
4.6
★★★★★
(1662 ratings)
Although not the absolute cheapest, Solgar offers a reliable 500mg L-Cysteine supplement from a trusted brand at a significantly better price per serving than Source Naturals powder, ensuring solid value.
Other sellers (3)
80 Value

Hair Skin & Nails

Swanson
4.7
★★★★★
(3642 ratings)
An excellent value option that combines a beneficial amount of L-Cysteine with other important beauty ingredients like MSM and Horsetail, providing multiple benefits at a very low price.
Other sellers (1)
98 Performance

Hair Force

KAL
4.5
★★★★★
(273 ratings)
Contains 500mg L-Cysteine and a comprehensive blend of hair-supporting nutrients, offering a more complete and potent solution for hair health than a pure L-Cysteine product.
Other sellers (1)
92 Performance

Vegan Hair Skin & Nails

NOW Solutions
4.7
★★★★★
(4158 ratings)
Combines L-Cysteine (250mg) with MSM, Hyaluronic Acid, and Biotin, providing a superior synergistic effect for skin and hair compared to a standalone L-Cysteine product.
Other sellers (3)
95 Performance

L-Cysteine 500 mg

NOW
4.4
★★★★★
(19931 ratings)
Includes synergistic Vitamin C and B6, which enhance L-Cysteine's effectiveness for collagen synthesis and metabolism, making it functionally superior for the stated goals.
Other sellers (4)
95 Budget

L-Cysteine 500 mg

NOW
4.4
★★★★★
(19931 ratings)
Offers a standard 500mg L-Cysteine dose plus Vitamin C and B6 at an exceptionally low price per serving (11 cents), making it vastly more affordable and effective than the Source Naturals powder.
Other sellers (4)
75 Budget

L-Cysteine 500 mg

Solgar
4.6
★★★★★
(1662 ratings)
Provides a pure 500mg L-Cysteine from a reputable brand at 21 cents per serving, offering a significantly lower cost for a quality L-Cysteine supplement compared to the Source Naturals powder.
Other sellers (3)
80 Budget

Hair Skin & Nails

Swanson
4.7
★★★★★
(3642 ratings)
A highly economical choice at 11 cents per serving, it includes L-Cysteine (100mg) along with MSM and Horsetail, providing a broader range of beauty benefits for significantly less cost.
Other sellers (1)
95 Value

L-Cysteine 500 mg

NOW
4.4
★★★★★
(19931 ratings)
Delivers an optimal L-Cysteine dose with added Vitamin C and B6 at a fraction of the cost per serving, making it an undeniable leader in value compared to the extremely expensive powder.
Other sellers (4)
75 Value

L-Cysteine 500 mg

Solgar
4.6
★★★★★
(1662 ratings)
Although not the absolute cheapest, Solgar offers a reliable 500mg L-Cysteine supplement from a trusted brand at a significantly better price per serving than Source Naturals powder, ensuring solid value.
Other sellers (3)
80 Value

Hair Skin & Nails

Swanson
4.7
★★★★★
(3642 ratings)
An excellent value option that combines a beneficial amount of L-Cysteine with other important beauty ingredients like MSM and Horsetail, providing multiple benefits at a very low price.
Other sellers (1)
98 Performance

Hair Force

KAL
4.5
★★★★★
(273 ratings)
Contains 500mg L-Cysteine and a comprehensive blend of hair-supporting nutrients, offering a more complete and potent solution for hair health than a pure L-Cysteine product.
Other sellers (1)
92 Performance

Vegan Hair Skin & Nails

NOW Solutions
4.7
★★★★★
(4158 ratings)
Combines L-Cysteine (250mg) with MSM, Hyaluronic Acid, and Biotin, providing a superior synergistic effect for skin and hair compared to a standalone L-Cysteine product.
Other sellers (3)
95 Performance

L-Cysteine 500 mg

NOW
4.4
★★★★★
(19931 ratings)
Includes synergistic Vitamin C and B6, which enhance L-Cysteine's effectiveness for collagen synthesis and metabolism, making it functionally superior for the stated goals.
Other sellers (4)
flagReport alternatives

SuppHelper

Compare supplements smarter. Science-backed, user-rated, updated daily.

Explore

  • Compare Supplements
  • Health Goals
  • Stacks

Legal

  • Privacy Policy
  • Terms of Use
  • Medical Disclaimer

Stay in the Loop

© 2025 SuppHelper. All rights reserved.