Evidence supporting the use of: L-methionine
For the body system: Nails
Synopsis
Source of validity: Scientific
Rating (out of 5): 2
L-methionine is an essential amino acid that serves as a building block for proteins, including keratin, which is a major structural component of nails. The rationale for using L-methionine to support nail health is based on its biological role in protein synthesis and in providing sulfur, a key element in keratin structure. Some laboratory and animal studies have shown that methionine deficiency can lead to impaired keratin production, which could theoretically impact nail strength and appearance. However, direct human studies evaluating L-methionine supplementation for improving nail health are limited and often lack rigorous design or large sample sizes.
Most evidence comes from the understanding of amino acid metabolism and the known composition of nails, rather than from clinical trials. While some dietary supplements include L-methionine for nail support, the claims are generally extrapolated from its role in protein and sulfur metabolism rather than from robust clinical research. Therefore, scientific validation exists at a basic biochemical level, but direct clinical evidence for efficacy in improving nail health through supplementation is weak. The overall evidence rating is modest (2 out of 5).
Other ingredients that support Nails
amino acidsbiotin
bovine
bovine gelatin
bovine liver
calcium
ceramides
collagen
fish protein
folate
gelatin
horsetail
iron
kale
L-cysteine
L-cystine
L-methionine
protein
selenium
silicon
keratin
soybean
spinach
vitamin B
vitamin C
seaweed
Zinc
trace minerals
wheat germ
Algae
argan nut oil
animal protein
beef
Beef liver
bovine protein
Brazil nut
chia seed
Cystine
DL-Methionine
egg
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ferritin
fish
jojoba oil
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Molasses
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Silicate
silica
Tea Tree Oil
Vegetable Protein
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