Ingredients dosed in grams rather than milligrams — collagen peptide, some fibres, many protein and amino-acid blends — do not fit into a tablet or capsule at a meaningful dose. Powder, granule and stick-pack formats exist largely to solve that problem, and Japan’s packaging industry has decades of experience refining the single-serve stick format specifically.
This guide covers the manufacturing issues specific to powders and granules — flowability, dispersibility and moisture — and where the stick pack fits as a packaging choice for a gram-level dose.
💬 Working with a gram-dosed ingredient? We match the powder format and packaging to the dose before you commit to a design. See Japan-made supplement OEM.
Powder, granule or stick pack: what each solves
Powder and granule are formulation choices about the particle itself, while a stick pack is a packaging choice for delivering either one as a single accurate serving.
| Form or format | What it is | Strengths | Watch-outs |
|---|---|---|---|
| Fine powder | Loose, unprocessed particles, typically spray-dried or milled | Cheapest to produce, dissolves quickly if particle size is right | Fine particles can be dusty, clump under humidity, and disperse poorly in water if not treated |
| Granule | Fine powder processed (wet or fluid-bed granulation) into larger, more uniform particles | Better flow, less dust, more consistent scoop or fill weight, often disperses better in water | Extra processing step adds cost and time |
| Stick pack | Single-serve sachet, usually filled with powder or granule | Accurate single dose, portable, protects the contents until opened, uses less packaging material than an equivalent pouch | The powder or granule inside still has to flow well through the filling equipment, or the line jams or under-fills |
| Bulk powder in a tub or bag | Multi-serve container, scooped by the consumer | Lower packaging cost per gram | Consumer measures their own dose; product is exposed to air and moisture every time it is opened |
Flowability and dispersibility
A powder that will not flow evenly through filling equipment, or will not dissolve cleanly in water, causes problems long before it reaches the consumer.
Very fine powder particles — common with spray-dried ingredients — tend to stick to each other, which makes them flow poorly through a filling line and dissolve unevenly or clump when stirred into water. Two approaches address this: granulating the powder into larger, more uniform particles before filling, which improves flow and often improves how readily it disperses in water; or modifying the particle surface (for example with a thin coating applied during processing) to reduce the fine particles’ tendency to stick together. The right approach depends on the ingredient — some actives cannot tolerate the moisture or heat involved in wet granulation and need a gentler process, or need dry granulation instead.
Dispersibility matters most for anything meant to be stirred into a drink: a powder that leaves a gritty residue or floats undissolved reads to the consumer as low quality, regardless of how sound the formulation is underneath.
💬 Have a fine, hard-to-dissolve powder ingredient? Tell us about it and we will discuss whether granulation or surface treatment is the better fix. Ask us about your formula.
Moisture control
Powders and granules are more exposed to moisture than a coated tablet or a sealed capsule, so packaging and storage design has to do more of the protective work.
A powder’s large surface area relative to its volume makes it more sensitive to humidity than a compressed tablet of the same weight: moisture uptake can cause clumping, reduce shelf life, and in some ingredients accelerate degradation. A single-serve stick pack, individually sealed, limits each dose’s exposure to air and moisture to the moment it is opened and used — which is an advantage over a multi-serve tub that is opened and left exposed repeatedly over weeks. High-barrier packaging film, chosen for the target climate, and (where the ingredient needs it) a desiccant in a multi-serve container are the usual tools for keeping a hygroscopic powder stable through shipping and storage.
Why gram-level doses favour this format
An ingredient dosed in grams rather than milligrams generally will not fit into a swallowable tablet or capsule, which is why powder, granule and stick-pack formats dominate for those ingredients.
Collagen peptide is the clearest example: an effective daily dose is commonly several grams, which would require an impractical number of large tablets or capsules. A powder, granule or stick pack carries that dose comfortably, mixed into a drink or taken directly. The trade-off is convenience versus portability and taste: a powder needs to be mixed with something (water, a drink, food) rather than simply swallowed, and its taste and texture are fully exposed to the consumer in a way a capsule’s contents are not. See our collagen peptide guide for how that ingredient’s dose shapes its own formulation choices, and our dosage forms overview for how gram-level doses compare with milligram-level ones more generally.
Accounts differ on the precise origin of the stick pack, but the format became established in Japanese packaging from the 1960s and 1970s, used first for products such as sweeteners and instant coffee before spreading to nutritional powders internationally. That manufacturing history is part of why Japanese contract manufacturers have deep, specialised experience filling and sealing single-serve powder sachets accurately at speed.
Before you ask for a quotation
A factory can quote a powder or granule product accurately once the particle form, dose and packaging format are fixed.
- Ingredient(s) and dose per serving (in grams)
- Fine powder or granule, and whether the ingredient tolerates wet processing
- How the consumer will take it (mixed into water, another drink, or eaten directly)
- Stick pack, multi-serve tub or bag, and the barrier level needed for your climate
- Any moisture- or heat-sensitivity in the active ingredient
- Countries you will sell in
💬 Ready to specify a powder, granule or stick-pack supplement made in Japan? Send us the ingredient and dose and we will map out the format and packaging.
Frequently asked questions
1. Why does my powder clump even though I keep it sealed?
Fine particles can absorb ambient moisture every time the pack is opened, and very fine powders are also prone to sticking together regardless of moisture, simply because of their small particle size. Granulation or a surface treatment usually improves this.
2. Is a granule always better than a fine powder?
Not automatically — granulation adds a processing step and cost, and some actives cannot tolerate the moisture or heat involved. It is worth it mainly when flow, dust or dispersibility in water are genuinely a problem.
3. Why choose a stick pack instead of a tub for a supplement?
A stick pack gives an accurate single dose and limits each serving’s exposure to air and moisture to the moment it is opened, which suits products where dose accuracy or shelf life matters. A tub is usually cheaper per gram but relies on the consumer to measure their own dose and exposes the remaining product to air each time it is opened.
4. Can a gram-level dose ever go into a capsule instead of a powder?
Not practically at a meaningful dose — the number of capsules needed would be impractical for daily use, which is why gram-dosed ingredients are almost always powder, granule, jelly or drink formats instead.
5. Does a powder supplement need different packaging for a hot, humid climate?
Usually, yes. Higher ambient humidity increases the risk of moisture uptake and clumping, so a higher-barrier film, and in some cases a desiccant, is worth specifying for export to a tropical market rather than assuming standard packaging will perform the same way it does in a drier climate.
Sources: General powder-formulation and granulation science, including fluidised-bed and surface-modification approaches to flowability and dispersibility (ScienceDirect S0260877417300912; PMC8304935; PMC9962946); stick-pack packaging history and benefits (Institute of Food Technologists, “Stick (Pack) It to Them”, ift.org/food-technology-magazine/stick-pack-it-to-them). Checked on 25 September 2026.