Definitions
Find a word or unit and understand what it tells you.
16 definitions
- Peptide
- Peptides are molecules made from amino acids joined together by peptide bonds.
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A name alone does not tell you how a particular product works, or whether it is suitable for personal use.
IUPAC: peptide definition ↗ - Labelled amount
- 10 mg is an amount of material. Read the label to see whether it means per vial, per tablet, or per package.
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A 5 mg and a 10 mg label describe different amounts. Neither label is an instruction for how much to use.
NIST: metric units ↗ - Purity
- A purity test compares the main substance with related impurities the method can detect. An amount test measures how much of a substance is present.
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A chromatographic percentage describes detector response. It does not by itself tell you the milligrams in a vial or whether it is sterile.
Bachem: analytical methods ↗ - Lab report
- A lab report describes tests on the submitted sample. Read the sample identity, result, units, method, and any stated test limit together.
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Check that the report belongs to the selected batch. A result for one sample does not prove every item has the same result.
- Freeze-dried
- Freeze-drying removes water from frozen material under reduced pressure. The technical word is lyophilization.
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It describes a drying process. It does not establish sterility, stability, or how a product should be prepared.
- Blend
- A blend contains more than one named component. Check the amount of each component separately.
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The combined mass is not the mass of every ingredient. Combining substances does not establish a combined benefit or safety.
- Studies and discussion
- Community reports describe what people say. Studies investigate a defined question using a stated method. Batch tests measure a submitted sample.
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These answer different questions. Discussion volume is not evidence of benefit, and a batch result is not a study in people.
- mg — milligram
- A milligram is one thousandth of a gram. It is a unit of mass.
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1 mg equals 1,000 mcg. Mass and liquid volume are different quantities.
NIST: metric units ↗ - mcg — microgram
- A microgram is one thousandth of a milligram. You may also see the symbol µg.
- mL — millilitre
- A millilitre is one thousandth of a litre. It is a unit of volume.
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Millilitres describe volume; milligrams describe mass. One cannot be converted to the other without more information.
NIST: metric units ↗ - mg/mL — concentration
- Milligrams per millilitre describes the mass of a substance in each millilitre of the final solution.
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Divide mass in mg by final solution volume in mL. An amount in mg alone is not enough to calculate concentration.
NIST: mass concentration ↗ - Final solution volume
- Final solution volume is the total volume after the material and liquid have been combined.
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It is not automatically identical to the volume of liquid added. A calculation does not select a solvent or establish compatibility.
- IU — international unit
- An international unit describes biological activity using a substance-specific reference standard.
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There is no universal IU-to-mg conversion. Keep activity units separate from mass.
- Bacterial toxin test
- An endotoxin test measures certain substances associated with bacteria. Keep the reported units and the sample basis, such as EU per vial.
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An endotoxin result is not a sterility result. A measurement range is not automatically a passing limit.
- Batch
- A batch number identifies a group of material. It helps connect a product to the sample and report that actually belong to it.
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A matching product name alone does not establish a batch match.
- Pack
- A pack groups a stated number of items. The number of packs and the number of items in each pack are separate.
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Read amount per item, items per pack, and number of packs together before ordering.