Many people ask what proteins are most appropriate
for hair growth. People with hair loss often turn to protein and amino acid
supplements as part of their treatment regime. Although it is rare for a lack
of protein to be a primary cause of hair loss, there is no harm in taking
extra protein or amino acid supplements if you wish. If you take a blood test
your serum total protein should be between 60–80 grams per liter. Less than
this suggests a problem with protein intake. And you may take some of the
protein supplements now available as either as powder protein supplements or
liquid protein supplements.
Amino acids and proteins
Protein serves as the major structural component of all
cells in the body, and functions as enzymes, in membranes, as transport
carriers, and as some hormones. During digestion and absorption dietary
proteins are broken down to amino acids, which serve as the building blocks
for formation of structural proteins and functional compounds of protein such
as enzymes and pre cursors of hormones etc. There are 20 amino acids in all
which are required for the synthesis of proteins.
Essential amino acids
But out of which some of the amino acids cannot be
synthesized by the body and are therefore are required to be taken as dietary
amino acid supplements. The amino acids: Phenylalanine, Valine, Tryptophan,
Threonine, Isoleucine, Methionine, Histidine, Arginine, Lysine and Leucine are
considered to be essential amino acids. But the distinction between essential
and non-essential amino acids is not very clear, as some amino acids can be
produced from others. For example the sulfur containing amino acids,
methionine and homocysteine, can be converted into each other, but neither can
be synthesized de novo in humans. Likewise, cysteine can be synthesized from
homocysteine, but not otherwise. So, for convenience, sulfur-containing amino
acids are sometimes considered a single pool of nutritionally-equivalent amino
acids.
Amino acids & protein for hair growth
Hair follicles require a constant supply of amino acids
via the blood stream to maintain hair growth. Hair follicles contain some of
the fastest growing and dividing cells in the body so their energy, vitamin,
mineral, and amino acid consumption is high. If amino acids are lacking,
particularly the essential amino acids listed below, the hair follicles may be
less able to produce hair fiber.
Benefits of amino acids
A lack of amino acids in a first world country diet is
very unusual and for the most part supplements are not required. However,
everyone should ensure they have a healthy, balanced diet that provides all
the amino acids required. There are many amino acids, but the nine amino acids
which are known as essential amino acids must be provided in the diet and are
indispensable amino acids which are required for both hair and other functions
of the body. The body can make the other 11 amino acids needed to synthesize
specific structures from the nine essential amino acids and carbohydrate
precursors.
Protein supplements
Proteins from animal sources, such as meat, poultry,
fish, eggs, milk, cheese, and yogurt, provide all nine indispensable amino
acids in adequate amounts and for this reason are considered “complete
proteins”. Proteins from plants, legumes, grains, nuts, seeds, and vegetables
tend to be deficient in one or more of the indispensable amino acids and are
called ‘incomplete proteins’. Vegetarian and vegan diets may contain enough
protein, but people following these diets may not be receiving all the
essential amino acids if they do not pay attention to the type of protein they
eat. Vegan diets adequate in total protein content can be “complete” by
combining sources of incomplete proteins which lack different indispensable
amino acids.
Amino acid function for hair
In terms of hair fiber production, the most important
amino acid is cysteine. Cysteine is the most common amino acid in hair. It is
particularly important because it contains sulfur molecules. As part of a
keratin protein chain, these sulfur molecules cross link with each other to
produce disulfide bonds. These chemical bonds are what gives hair its
strength. For this reason the most popular amino acid supplement taken for
hair is cysteine.
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