VALREXA Originals

Short explainers made by VALREXA. Each one is under a minute, built from primary sources, and graded against the evidence.

Amino acid spotlight

One amino acid at a time: structure, role, food sources and the evidence.

Amino acid spotlight · No. 1Tryptophan: does turkey make you sleepy?

Meet the amino acid behind the holiday myth: what it is, what the body makes from it, and why turkey is not a sleeping pill.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 2Leucine: why do lifters love it?

The branched-chain amino acid that signals cells to build protein, where it is found, and what the evidence says about supplements.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 3Glycine: the smallest amino acid

A single hydrogen for a side chain, a third of collagen, and a messenger in the nervous system.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 4Arginine: the nitric oxide amino acid

How the body turns arginine into nitric oxide, where it comes from, and why more is not always better.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 5Alanine: The simplest chiral amino acid

Alanine links muscle and liver, helping keep blood sugar steady between meals.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 6Valine: One letter changes a life

A single valine in the wrong place causes sickle-cell disease. That is how much order matters.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 7Isoleucine: Leucine's twin

Isoleucine and leucine share a formula, but their shapes give them different roles.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 8Proline: The amino acid that bends

Proline’s locked ring gives proteins their turns, and collagen its strength.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 9Phenylalanine: Why diet soda has a warning

Newborn screening and a special diet let people with PKU live healthy lives.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 10Methionine: Where every protein begins

Methionine starts nearly every protein and feeds the methylation reactions cells depend on.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 11Serine: A small switch

Serine helps cells signal, and supplies parts for other amino acids and membranes.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 12Threonine: Two chiral centers

Threonine completed the list of essential amino acids and helps build the gut’s mucus barrier.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 13Cysteine: The amino acid that perms hair

Cysteine’s sulfur lets proteins lock their shape and powers the antioxidant glutathione.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 14Tyrosine: The precursor of dopamine

Tyrosine is the starting point for dopamine, adrenaline, thyroid hormones and melanin.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 15Asparagine: The first amino acid ever found

The first amino acid ever found is now central to a leukemia treatment.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 16Glutamine: The most abundant one

Glutamine moves nitrogen around the body and feeds fast-dividing cells.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 17Aspartic acid: A negative charge

Aspartic acid’s negative charge helps proteins work, and it feeds core metabolism.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 18Glutamic acid: The taste of umami

Glutamate is the brain’s main “go” signal and the source of umami flavor.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 19Lysine: The limiting amino acid

Lysine is often the missing piece in grain-based diets, which is why legumes matter.

55 sec · Vertical format, also on Instagram
Amino acid spotlight · No. 20Histidine: Biology's pH switch

Histidine’s unique ring lets it switch charge, which enzymes and hemoglobin rely on.

55 sec · Vertical format, also on Instagram

Peptide science 101

The foundations of peptide science, explained in under a minute.

Peptide science 101 · No. 1What is a peptide?

Amino acids, peptide bonds, peptides versus proteins, why order matters, and why not every peptide is a medicine.

56 sec · Vertical format, also on Instagram
Peptide science 101 · No. 2How to read the research

The four levels of evidence, plus the red and green flags to look for in any health claim.

55 sec · Vertical format, also on Instagram
Coming next

More originals

New explainers are added regularly. Tell us what to cover: contact@valrexa.com

  • Beyond the 20: GABA, taurine and citrulline
  • Understanding HPLC and purity
  • Purity vs. sterility vs. endotoxins
  • What the FDA compounding decision means
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