What is BLG protein?
BLG stands for beta-lactoglobulin. It is the most abundant protein in bovine whey and a complete protein: it contains all nine essential amino acids, including leucine, which is involved in muscle protein synthesis when you also train and eat enough total protein.
Neo Protein uses BLG made by precision fermentation. Microorganisms produce the same protein sequence as dairy BLG without milking cows. The shot is lactose-free. It is not safe for people with a milk protein allergy, because the protein is still BLG.
BLG compared with common protein types
| Protein | Complete amino acids | Lactose | Animal milk used in production | Neo Protein shot |
|---|---|---|---|---|
| Precision-fermented BLG | Yes | No | No | 25g per 3.4 oz |
| Whey concentrate | Yes | Usually some | Yes | Not used |
| Whey isolate | Yes | Typically very low | Yes | Not used |
| Pea protein | Often low in methionine unless blended | No | No | Not used |
BLG vs whey vs plant protein
Whey protein powder is a mixture of dairy proteins (including BLG and others) left after cheese-making, then filtered. Isolate is lower in lactose than concentrate. BLG as a single protein is a defined fraction of whey, not a blend of everything in a scoop of whey.
Precision-fermented BLG is produced without the animal, then used as the protein in the shot. Plant proteins can be complete when blended, but many single plant sources are lower in one or more essential amino acids. Neo Protein lists 25 grams of protein, 100 calories, and 0 grams of carbs, sugar, and fat per 3.4 oz serving.
Allergy, vegan labeling, and lactose
Lactose is a milk sugar. Precision-fermented BLG is made without lactose. A milk protein allergy is an immune reaction to the protein, not the sugar. If you react to whey or milk proteins, do not use this product unless your allergist says otherwise.
The production process is animal-free. Marketing sometimes says “vegan process” while the molecule matches a milk protein. Read the label: not for milk-protein allergy.
How precision-fermented BLG is made
Precision fermentation feeds a defined protein gene to a production microorganism. The microbe expresses beta-lactoglobulin; the protein is then separated, purified, and used as the protein ingredient in the shot. Cows are not milked for that BLG. The amino acid sequence is still dairy BLG, which is why allergy guidance matches milk protein, not lactose.
Neo Protein bottles that protein at 25 grams per 3.4 oz (100 ml) serving, with 100 calories and 0 grams of carbohydrate, sugar, and fat on the label. Ingredients in label order: BLG protein, purified water, phosphoric acid, malic acid, pectin, natural flavors, potassium sorbate, sodium benzoate, stevia leaf extract (Reb M), monk fruit extract. Made in the USA; third-party lab tested.
Is BLG protein safe?
For most people without a milk protein allergy, BLG is a food protein that has been eaten for decades as part of whey. Precision-fermented BLG is the same protein, produced differently. Neo Protein is a food, not a medicine. It does not treat disease.
Do not use it if you have a milk protein allergy. People with chronic kidney disease or a clinician-set protein limit should ask their care team before adding concentrated protein. More detail: Is BLG protein safe / how is it made.
Frequently asked questions
BLG is beta-lactoglobulin, the primary protein in cow’s milk whey. It is a complete protein. Neo Protein uses precision-fermented BLG to deliver 25 grams of protein in a 3.4 oz shot with 100 calories and 0 grams of carbs, sugar, and fat.
BLG is a major protein inside whey, not the entire whey blend. Whey powders contain BLG plus other milk proteins. A BLG shot is a single complete protein, not a multi-fraction whey concentrate or isolate.
It is made without cows and without lactose. The protein sequence is the same as dairy BLG, so it is not dairy-protein-free for allergy purposes. People with milk protein allergy should avoid it.
Yes. The formula uses precision-fermented BLG and lists 0 grams of sugar and 0 grams of total carbohydrate per shot. Lactose-free is not the same as milk-protein-allergy-safe.
Yes. Beta-lactoglobulin is a complete protein. Each Neo Protein shot provides 25 grams of that complete protein.
Precision fermentation uses microbes as a production system to make a specific protein. The result is BLG that matches the dairy protein, without raising or milking cows for that ingredient.
“Better” depends on the goal. Neo Protein’s advantage in this bottle is the format: 25 grams, 100 calories, 0g carbs/sugar/fat, 3.4 oz, no mixing. Whey isolate is also a high-quality complete protein; it is usually sold as a powder with different macros once mixed.
The manufacturing process does not use animals. The protein is identical to a milk protein. Whether that fits a personal vegan definition is a labeling and ethics choice; medically, milk-protein allergy is still a stop sign.
Related guides
25g protein. 3.4 oz. 100 calories.
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