Shilajit has moved from specialist herbal shops into mainstream private-label demand, and capsules are the format most buyers ask for first. It is also one of the trickier raw materials to build a defensible product around, because purification and testing matter more here than in most supplement categories. This guide covers what the material is, how it is standardised, and the capsule-specific decisions you will need to settle before launch.

What is shilajit?

Shilajit is a dark, tar-like exudate that accumulates in rock crevices in high-altitude mountain ranges, including the Himalayas, the Altai and the Caucasus. It is a complex mixture rather than a single molecule: humic and fulvic substances, dibenzo-α-pyrones, and a broad spectrum of trace minerals make up the bulk of it, and the composition varies with the collection site and the season.

It has a long history of use in traditional Ayurvedic practice, and that traditional framing is usually how the material is presented on-market today. For a manufacturer, the practical consequence of its complexity is that "shilajit" on a spec sheet means very little on its own — you have to define the grade, the purification route and the marker you standardise on.

Raw-material formats: resin, powder, extract

  • Resin — the traditional semi-solid form. Soft, sticky and sensitive to heat, so it is awkward to handle in high-speed filling equipment and usually sold as a standalone jarred product rather than as a capsule fill.
  • Purified dried powder — the resin is dissolved, filtered and dried into a free-flowing powder. This is the workhorse grade for capsules and tablets.
  • Standardised extract — a powder where a marker (most often fulvic acid content) is declared to a target percentage. This is the grade that lets you put a meaningful number on your label.
  • Liquid extracts — used in drops, shots and stick packs, typically with preservative or pH control because the extract is hygroscopic.

Purification and standardisation: where the work is

Raw shilajit arrives with rock debris, sand and plant matter, and the quality of the finished product is largely decided at the purification step. A commercial process typically dissolves the raw material in purified water, removes insoluble residue by filtration or centrifugation, then concentrates and dries the filtrate under controlled temperature. Whatever the route, the finished specification should state the extract ratio, the carrier or diluent if any, and the assay method used for the declared marker.

Because the raw material is a mineral-rich natural exudate, heavy-metal content is the single most important control point. Any serious supplier tests lead, arsenic, cadmium and mercury on every lot of incoming material and on the finished batch, and can show you those results. Microbial limits, moisture content and solubility or dispersibility in the capsule fill also belong on the specification.

Capsule formulation decisions

  • Fill weight and capsule size — size 00 or 0 is common, with a fill weight matched to the declared extract dose. Check the finished unit size against your bottle dimensions before approving artwork.
  • Shell choice — opaque shells in a dark or coloured tone are often used for this material, both to mask the naturally dark powder and to reduce light exposure. Gelatin and HPMC vegetarian options are both available.
  • Flow and moisture — the powder is hygroscopic, so an anti-caking or glidant excipient and moisture-barrier packaging are usually part of the design. Every excipient has to be declared correctly on the label.
  • Blends — shilajit is frequently paired with other botanical extracts in a single capsule. Blending changes the fill weight, the assay scope and the label order, so agree the finished formula before dosing is locked.
  • Documents — a certificate of analysis with every batch, plus the heavy-metal and microbial results that sit behind it.

Labelling and market notes

Permitted wording, mandatory statements and the acceptable daily amount of this material differ by market, so the target market has to be settled before the artwork is finalised — reprinting a label costs far more than changing a specification. On Alibaba.com, shilajit capsules are offered by a large and still-growing supplier base across resin, powder and capsule formats, with private-label and OEM options quoted down to very low minimums, so buyers can compare offers easily and will ask sharp questions about purification and test data. Being able to answer those questions with documents is the difference between quoting and winning the order.

How Haiyue Shengda works

We produce private-label hard capsules in gelatin or HPMC vegetarian shells, including herbal and botanical extract fills such as shilajit, with custom fill weight, shell colour, printing and packaging under your brand — OEM/ODM customization supported. MOQ starts from 500 units per SKU for trial batches; free samples arrive in 3–5 days and shipment happens within 7 days, with a COA for every batch. Tell us your target dose and market and we will come back with a specification — we respond within one hour. You can also review our capsule range or contact us directly.