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L-Methionine 500 mg

Solgar
4.7
★ ★ ★ ★ ★
(956 ratings)
Methionine
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Score86
A transparent 500 mg L-methionine dose offers focused keratin support, but visible benefits may be limited without a dietary gap.
How scoring works
Quantity:90 Capsule(s) • (90 servings)
Goals:
Nail Health
Hair Health

Score 86

A transparent 500 mg L-methionine dose offers focused keratin support, but visible benefits may be limited without a dietary gap.
How scoring works
$16.99($0.18 per serving)
iHerb
$ 16.99
Pure Formulas
$ 17.99
Vitacost
$ 18.23
Daily Vita
$ 19.80
Amazon
$ 17.99
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Analysis

Five hundred milligrams of L-methionine supplies a sulfur-containing amino acid used to make cysteine and keratin. The structural link is relevant to hair shafts and nails, especially when dietary protein or sulfur amino acids are inadequate.

The natural L-form and exact amount are disclosed, though no branded source or purity grade is stated. Direct evidence for visible cosmetic improvement from methionine alone is less developed than its biochemical role suggests.

A ninety-serving bottle supports convenient regular use. Serving value is reasonable for a focused amino acid. The formula suits targeted structural support rather than comprehensive hair or nail care.

Who is it for
  • Adults seeking targeted sulfur amino-acid support
  • Users with a clinician-identified need for methionine
Best for
  • Focused keratin building-block support
  • Simple single-amino-acid use

Pros

  • Meaningful 500 mg amount
  • Clear L-methionine identity
  • A ninety-serving bottle supports convenient regular use.

Cons

  • Narrow single-pathway formula
  • Limited direct cosmetic evidence
  • No branded purity standard

Warnings

  • L-methionine can cause nausea, digestive upset, or drowsiness in some users.
  • People with homocystinuria should not use supplemental methionine unless directed by a specialist.
  • Long-term methionine use without adequate folate, vitamin B6, and vitamin B12 may raise homocysteine in susceptible users.

Nutrient quality

95 Highest impact

The clearly identified L-form and substantial amount support a focused formula. Missing source-grade detail is the main quality limitation.

Ingredient transparency

83 Highest impact

Every listed active has a specific amount, and no proprietary blend hides key doses. The serving count is clear, but intake directions and non-active ingredients are not supplied.

Customer satisfaction

70 High impact

Customer sentiment is strong, and the large review volume gives the average useful support. No review excerpts are supplied, so repeated complaints and purpose fit cannot be verified.

Value for money

95 Highest impact

A meaningful standalone amount is delivered with strong serving efficiency. The clean formula and low cost compare favorably within the category.

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Goals

Nail Health
Nail Health
Impact
High effect
C+ Goal FitA+ Strength of SupportC CoverageA Formula Quality
Methionine · 500 mg

Methionine provides a relevant route to nail health. The disclosed amount appears meaningful for that focused role.

The formula remains narrow rather than comprehensive. L-Methionine 500 mg is best viewed as targeted support rather than proof of a clinical benefit.

Study evidence
Hair Health
Hair Health
Impact
High effect
C- Goal FitA Strength of SupportD CoverageA Formula Quality
Methionine · 500 mg

L-methionine supplies sulfur needed for keratin structure and may help when dietary amino acid intake is inadequate. Direct evidence for improving hair growth in well-nourished users is limited.

The natural L-form and substantial standalone amount are clearly disclosed. The focused formula supports one structural pathway without addressing follicle signaling or scalp health.

Study evidence

Ingredients

IngredientAmount per serving
L-Methionine
500 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Vegetarian
Report overview
Methionine · 500 mg OverallScore95
A- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The natural L-methionine form is clearly disclosed at a potent standalone dose. Brand reputation supports reasonable quality confidence, although no formal purity grade or branded source is identified. The low serving cost makes the formula notably efficient for its strength.

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83 Performance

L-Methionine 500 mg

Metabolic Maintenance
<p>It offers stronger or more relevant ingredient coverage by providing a fully disclosed 500 mg standalone L-methionine amount with useful hair and nail alignment. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; no named purity grade or branded source is supplied, and the simple capsule omits broader liver-support actives.</p>
85 Performance

L-Methionine

NutriCology
<p>It offers stronger or more relevant ingredient coverage by delivering 500 mg of standalone L-methionine with straightforward dose disclosure. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; the focused design lacks a named purity standard and does not replace broader botanical or urinary ingredients.</p>
77 Performance

Liver Support Factors

Country Life
<p>It offers stronger or more relevant ingredient coverage by using 400 mg of methionine with milk thistle, choline, artichoke, and turmeric in a coherent liver-focused formula. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; most botanical extracts lack active-marker standardization and several companion amounts are modest.</p>
87 Budget

Pharmaceutical Grade AjiPure L-Methionine 500 mg

Swanson Ultra
<p>It lowers recurring cost while supplying a focused 500 mg amount of pharmaceutical-grade AjiPure L-methionine. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; the unusually clear identity suits focused methionine, hair, and nail use, but it does not reproduce broader liver or urinary formulas.</p>
65 Budget

Super Thisilyn

Nature's Way
<p>It does not undercut the original’s serving cost, but it remains among the closest supplied options while pairing 50 mg of methionine with milk thistle, artichoke, N-acetyl cysteine, turmeric, and alpha-lipoic acid. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; most companion amounts are small, milk-thistle potency is unclear, and a proprietary vegetable blend reduces transparency.</p>
70 Budget

Kidney Bladder Wellness

Bio Nutrition
<p>It does not undercut the original’s serving cost, but it remains among the closest supplied options while combining 50 mg of methionine with 500 mg of cranberry, 300 mg of hibiscus, and other urinary-support ingredients. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; the probiotic amount is unspecified and several secondary ingredients are modest.</p>
69 Value

Lipotropic Complex

Integrative Therapeutics
<p>It offers a practical quality-to-cost trade-off by combining 333 mg of methionine with active B-vitamin forms, choline, milk thistle, dandelion, and bile-support ingredients. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; magnesium partly uses oxide, milk-thistle potency is unclear, and ox bile may not suit people with obstructed bile flow.</p>
74 Value

Lipotropic Detox

Pure Encapsulations
<p>It offers a practical quality-to-cost trade-off by pairing 150 mg of methionine with methylfolate, methylcobalamin, choline, betaine, turmeric, milk thistle, and taurine. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; the broad liver-focused design is coherent, but several supporting amounts are modest.</p>
73 Value

Detox & Liver Health

Reg'Activ
<p>It offers a practical quality-to-cost trade-off by combining milk thistle, N-acetyl cysteine, selenomethionine, a named probiotic strain, and 50 mg of L-methionine. Compared with the original’s focused 500 mg capsule, lower-dose blends trade hair-and-nail focus for additional ingredients; milk thistle is not standardized and both N-acetyl cysteine and L-methionine are modest for the serving cost.</p>
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