1. Indian Spirit Kratom — Yellow Hulu Kapuas, 25g / 50g
Loose Yellow Hulu Kapuas kratom powder from Indian Spirit, in 25-gram and 50-gram bags. Of all the region names in the kratom trade, this is the one that most plausibly refers to an actual place.
Hulu Kapuas is the upper reaches of the Kapuas river in Kalimantan — the Indonesian portion of Borneo. The Kapuas is the longest river in Indonesia, and the upper region is remote rainforest, reached by boat, with a genuine and long-standing kratom-harvesting tradition.
The yellow designation refers to extended or modified drying rather than to a vein colour. Combined, this is one of the less common strains on the market.
Legal status: Mitragyna speciosa is legal to sell and possess in the Netherlands. It is banned or controlled in several other countries and remains under regulatory review in the EU and the United States. Check the law where you live before ordering.
2. Specifications
| Specification | Detail |
|---|---|
| Product name | Indian Spirit Kratom — Yellow Hulu Kapuas, 25g / 50g |
| Brand | Indian Spirit |
| Plant | Mitragyna speciosa |
| Vein type | Yellow |
| Strain | Yellow Hulu Kapuas |
| Form | Loose powder |
| Sizes | 25 grams and 50 grams |
| Commonly used as | A tea, 4 to 5 grams brewed |
| Onset | Around 15 minutes for a tea, lasting several hours |
| Storage | Airtight, cool, dry, out of light. Do not refrigerate |
| Age restriction | 18+ only |
3. Scarcity
Hulu Kapuas is genuinely harder to source than Borneo or Bali material, and that has practical consequences worth knowing about:
- The region is remote. Upper Kapuas is deep in Kalimantan, and material moves down river rather than by road. That is a real constraint on volume rather than a marketing story.
- Which means availability fluctuates. A strain you like may not be in stock in three months, and that is genuinely true of this one rather than a scarcity tactic.
- Batch variation is likely to be higher. Smaller volumes from a smaller area mean less blending and less averaging out, so two bags may differ more than two bags of Borneo would.
- Which is an argument for the 25-gram bag first, and for buying more of a batch you get on with rather than assuming the next will match.
- And a reason to be sceptical of the name elsewhere. Because Hulu Kapuas sounds specific and commands a premium, it is a name worth verifying with the supplier rather than the label.
3.1 What it is described as
The reported character is what you would expect from the combination: yellow processing smoothing and lengthening what is otherwise a fairly typical Bornean profile. Users generally describe it as balanced and notably long-lasting, without either the sharpness of a white or the heaviness of a red.
If you like the strain, buy the size that suits your use and keep it stored properly — airtight, cool, dry and dark. It will not always be available.
4. Using it
4.1 Brewing it
- Four to five grams, weighed on a 0.1 g scale. Spoons are not a measure with powder.
- Stir into hot but not boiling water.
- Sweeten it. Honey is traditional; anything strongly flavoured works.
- Drink it all, sediment and all.
- An hour before you reconsider. Fifteen minutes is when it starts, not when it finishes arriving.
4.2 50 grams — the standard size
Fifty grams is roughly ten to twelve sessions at a typical amount — the size for a strain you already know suits you, at a better price per gram than the 25.
- Buy this size once you have tried the strain, not before. The 25-gram bag exists precisely so you do not commit blind.
- Store it properly and it keeps. Airtight, cool, dry and dark. Air, light, heat and damp are what degrade kratom, roughly in that order.
- Do not refrigerate it. Condensation when it comes back out does more harm than room temperature ever would. This catches people out because the advice for truffles is the opposite.
- Decant into a jar if the bag is not resealable, and write the date you opened it on the lid.
- Fifty grams is enough to slide into a routine with. Decide your spacing before it arrives rather than after — frequency, not quantity per session, is what builds tolerance.
5. Cautions
- Not for anyone under 18, pregnant or breastfeeding.
- Kratom acts on the body’s opioid receptors. Regular use can lead to tolerance, dependence and withdrawal — this is well documented and is the single most important thing to know before starting.
- Do not combine with alcohol, sedatives, opioid medication or other central nervous system depressants. This combination is where serious harm occurs.
- Do not use if you have heart, lung, liver or kidney problems, high or low blood pressure, or diabetes, without medical advice.
- Do not drive or operate machinery after use.
- Kratom is restricted or banned in several European countries and under active regulatory review elsewhere. Check your local law before ordering.
- Keep out of reach of children and pets.
Hulu Kapuas is one of the few kratom region names that genuinely refers to a place: the upper Kapuas river in Kalimantan, reached by boat.
- Loose Yellow Hulu Kapuas Mitragyna speciosa powder from Indian Spirit, in 25g and 50g bags.
- Hulu Kapuas is the upper Kapuas river in Kalimantan — remote Bornean rainforest, reached by boat.
- One of the few kratom region names that plausibly describes an actual growing area.
- Genuinely scarcer than Borneo or Bali material, so availability fluctuates and batches vary more.
- Described as balanced and long-lasting, without a white’s sharpness or a red’s weight.
- Brew 4 to 5 grams as a tea, weighed. 18+ only.
- Order before 16:00 on weekdays for same-day dispatch in plain, unmarked packaging.


