Pürblack Shilajit Review 2026: Patents, NSF Screening and the Resin-Only Claim

The Lineup and What Each Jar Costs

Pürblack's main products are True Gold (with gold), Immunity Max (with what the company calls Coated Silver), a large 210 g True Gold X7 jar, and an unflavored Research Grade resin with no added metals. On its US site on October 16, 2026, True Gold was $93.33 for 30 g and $55.00 for 15 g, and Immunity Max was $99.99 for 30 g.

Product	Size	Listed price	Cost per gram	Added ingredient
True Gold	30 g	$93.33	$3.11	Gold, 555 ppm
True Gold	15 g	$55.00	$3.67	Gold, 555 ppm
Immunity Max	30 g	$99.99	$3.33	"Coated Silver"
True Gold X7	210 g	See site	Lower per gram	Gold, 555 ppm
Research Grade Shilajit	15 g	See site	Varies	None

Prices come from Pürblack's own store. The same product appears at other retailers at different prices, from about $93 to $99 for the 30 g True Gold, and much higher at some third-party sellers. Buying from the brand or an authorized retailer also matters for authenticity, since popular shilajit brands are counterfeited. Pürblack says each jar carries a serial number linked to its own database.

Retail listings describe the 30 g jar as 60 servings, which puts a serving at about 0.5 g. Jars come with a small measuring tool, which the company calls the Pürscale.

"Only Resin Is Effective": Checking the Claim

Pürblack's site says shilajit "works in resin form." The trials most often used to support shilajit's effects gave people a purified shilajit extract as a dry powder in capsules, not resin. A 2026 pilot study did test a resin product and also reported benefits. The evidence supports purified shilajit in more than one form.

Pürblack's shop page states, in bold: "Only Resin is Effective. Shilajit works in resin form." The argument behind it is that drying and powdering shilajit can damage or remove some of its compounds, so the natural resin keeps more of what makes it work.

That argument has some logic, but the published human data cut against the strong version of the claim. Consider who used what:

Pandit et al., 2016. 250 mg of purified shilajit twice a day for 90 days. Total testosterone, free testosterone and DHEAS rose compared with placebo, while LH and FSH stayed stable (Pandit et al., 2016). The material was a purified, standardized dry extract.

Keller et al., 2019. PrimaVie extract at 250 mg or 500 mg a day for eight weeks. The 500 mg group retained more maximal strength after a fatiguing exercise protocol; the 250 mg group did not differ from placebo (Keller et al., 2019).

Das et al., 2016 and 2019. Purified shilajit extract in capsules, studied for effects on muscle gene expression and skin blood flow (Das et al., 2016; Das et al., 2019).

Yadav et al., 2026. A resin product, TruBlk, at 250 mg twice a day for 28 days in 25 healthy men. Strength, endurance and fatigue measures improved, but the study was open label with no placebo group (Yadav et al., 2026).

So the placebo-controlled evidence comes from extracts, and the resin evidence comes from a smaller, uncontrolled pilot. A fair reading is that purification and standardization matter more than whether the final product is a sticky resin or a dry powder. Resin may still be a good choice. It is not the only one that has worked.

Seven Patents: What a Patent Proves and What It Doesn't

A US patent shows that a process is new and specific enough to be protected. It does not show that the resulting product works better for people. Pürblack lists seven granted patents, including numbers 10,130,656 and 10,967,004, covering extraction, purification and processing of its resin.

Pürblack names several of its patents on its shop page, describing successive "generations" of resin. Its current Live Resin, used in True Gold and Immunity Max, is described as a fifth-generation product with improved physical properties and the option of precious metals such as gold, silver and platinum. Older retail listings reference a 2013 patent application and a fourth-generation resin, which shows the product has changed over time.

Patents are useful for a buyer in one specific way. They describe a defined, repeatable process, which tends to go along with consistent manufacturing. A company that has invested in patenting a purification method is likely to control that method carefully.

What a patent cannot do is substitute for a clinical trial. Patent examiners judge whether an invention is new, useful in the legal sense and not obvious. They do not test whether a supplement improves energy, strength or hormone levels. When a brand presents patents as proof of effectiveness, read them as proof of process.

NSF Screening and Public Certificates

Pürblack states that every batch is screened by NSF, an independent lab, for heavy metals, microbial contamination and purity, then checked internally, with results published as public certificates batch by batch. That is a high standard for this category. Buyers should still match the certificate to the jar's batch and look for a fulvic acid figure, which shilajit certificates often omit.

The company's homepage describes the process this way: before any product ships, it is screened by NSF for heavy metals, microbial contamination and purity, then verified internally against Pürblack's own specifications, and every result is published as a public certificate of analysis. Its product page points buyers to a certificate page with batch-specific results.

For shilajit, that matters a great deal. A 2022 analysis of commercial shilajit samples found lead, arsenic, mercury and other elements above permissible limits (Aldakheel et al., 2022). Earlier, a JAMA study found detectable lead, mercury or arsenic in about one-fifth of Ayurvedic products bought online (Saper et al., 2008). Independent testing by a known lab is one of the few protections a buyer has.

Two checks are worth doing yourself. First, match the batch or serial number on your jar to the posted certificate. Second, look for composition data, especially fulvic acid content. Many shilajit certificates focus on safety (metals and microbes) and leave out composition. If the certificate shows only contaminant results, it tells you the resin is clean, not how concentrated it is. Our shilajit contamination guide explains what a complete certificate covers.

We did not review a specific Pürblack lot certificate for this update, so we are reporting the company's stated testing process rather than results from a particular batch.

Dose: Half a Gram of Resin vs 500 mg in Trials

The controlled trials that found effects mostly used 500 mg a day of purified extract, and the one trial that compared doses found 250 mg no better than placebo. Pürblack's 0.5 g serving is in that range. Resin is not identical to dried extract, so the match is approximate.

Study	Material and daily dose	Length	Participants	Finding
Pandit 2016	Purified extract, 500 mg (250 mg twice daily)	90 days	Healthy men	Total and free testosterone and DHEAS rose vs placebo
Keller 2019	Extract, 250 or 500 mg	8 weeks	Active men	500 mg helped retain strength after fatigue; 250 mg did not
Das 2016	Extract, 500 mg (250 mg twice daily)	8 weeks plus 4 with exercise	Healthy adults	Muscle connective tissue genes increased
Das 2019	Extract, 250 or 500 mg	14 weeks	Healthy middle-aged women	Higher dose improved skin blood flow
Yadav 2026	Resin, 500 mg (250 mg twice daily)	28 days	25 healthy men, open label	Strength and fatigue scores improved

Resin contains some moisture and is not standardized to a fixed fulvic acid content in the way a branded extract is, so 0.5 g of resin is not exactly 500 mg of extract. The amounts are in the same order of magnitude, which is the most anyone can say without a trial on Pürblack's product.

Several of these studies split the daily amount into two doses. With resin, that is easy: dissolve half a serving in the morning and half later in the day. Our shilajit dosage guide covers timing and how people usually start.

Gold at 555 ppm, Silver in Immunity Max

At 555 parts per million, a 0.5 g serving of True Gold contains about 278 micrograms of gold. No human study has shown a benefit from adding gold to shilajit. Immunity Max adds silver, which also lacks evidence of benefit for healthy people. Both additions raise the price without adding studied value.

Parts per million convert directly to micrograms per gram, so 555 ppm means 555 micrograms of gold per gram of resin. Half a gram therefore holds about 278 micrograms. Retailers describe the gold as naturally infused nanoparticles rather than a coating, and marketing copy attributes effects on mitochondria, the nervous system and cognition to it. We found no controlled human trial of gold-infused shilajit on any of those outcomes.

Gold preparations have a place in Ayurvedic tradition, and gold compounds have been used in medicine for specific purposes under supervision. That history does not tell us what a few hundred micrograms of nanoparticle gold does in a daily supplement. The safest summary is that it is a premium feature backed by tradition and marketing, not by trials.

The same applies to silver in Immunity Max. Silver is not an essential nutrient. Colloidal silver products have been sold for decades without convincing evidence of benefit, and high long-term intake can discolor the skin. At the small amounts in a shilajit serving, harm is unlikely, but benefit is unproven.

If you like Pürblack's process and testing but not the added metals, the Research Grade jar is the better fit.

Contamination Risk Across the Category

Shilajit forms in rock and absorbs whatever minerals the rock contains, including toxic metals. Purified, tested products have shown good safety in animal studies and short human trials. Unpurified products are where the risk lies, which is why a brand's testing record matters more for shilajit than for most supplements.

A review of shilajit's safety and efficacy noted that, despite long traditional use, relatively few well-controlled human studies exist (Stohs, 2014). The safety data that do exist come from purified material. In a 91-day study in rats, purified black shilajit showed no signs of toxicity at doses far above human intake (Velmurugan et al., 2012), and the human trials above reported no serious problems over 4 to 14 weeks.

The contamination studies point to where the danger is: raw or poorly processed shilajit, and products sold without testing. Pürblack's stated process addresses that risk directly. The same cannot be said for many low-cost resins sold through marketplaces with no certificate at all.

People who are pregnant or breastfeeding, or who take prescription medication, should talk to a doctor before taking shilajit. Our shilajit side effects guide lists the effects people report most often.

Price per Day Compared

At $93.33 for 60 servings, True Gold costs about $1.56 a day at 0.5 g. That is lower per day than Cymbiotika's resin and Liquid Complex and about the same as our own shilajit capsule blend. Per gram, Pürblack is at the top of the market; per serving, it is mid-range.

Product	Daily amount	Cost per day	Testing
Pürblack True Gold (30 g)	0.5 g resin	about $1.56	NSF screening per batch; public certificates (per company)
Pürblack True Gold (15 g)	0.5 g resin	about $1.83	Same
Cymbiotika Mineral Shilajit (15 g)	0.5 g resin	about $2.23	Not reviewed
Cymbiotika Shilajit Liquid Complex	200 mg extract per packet	about $2.54	Full lot certificate posted
YourHealthier Shilajit Adaptogen Complex (our product)	400 mg shilajit extract plus ashwagandha, sea moss and tongkat ali	about $1.57	Certificate on request

Our product appears because we sell it, and it is a capsule blend, not pure shilajit, so it is not a direct comparison. Its certificate is available on request rather than posted, which is a lower level of public documentation than Pürblack describes. Our Cymbiotika review covers that brand's documents in detail.

The headline "most expensive per gram" is true and also slightly misleading. A gram of resin covers two servings, so per-gram comparisons with capsule products that list milligrams per serving can mislead in either direction. Price per day at the serving you plan to take is the fairer measure.

Research Grade or True Gold?

Choose Research Grade if you want Pürblack's resin and testing without added metals. Choose True Gold only if you specifically want the gold for traditional or personal reasons, accepting that its benefit is unproven. The shilajit inside is described as coming from the same process.

Pürblack describes Research Grade as its resin "in its purest form." Retailers that carry both describe Research Grade as pristine and unaltered, and True Gold as the option for buyers drawn to the added gold. That framing is honest: the base product is the same family of resin, and the difference is the infusion.

From an evidence standpoint, Research Grade is the version that most closely resembles the purified shilajit used in trials, because it has nothing added. If you are comparing Pürblack with a standardized extract such as PrimaVie, compare Research Grade, not True Gold.

Size is the other decision. The 15 g jars cost more per gram than the 30 g jar. If you already know you like resin, the larger jar is better value. If you are trying shilajit for the first time, a 15 g jar limits what you spend while you find out whether you tolerate it and will keep taking it. Remember that consistent daily use for at least several weeks is what the trials measured, so judge any jar over that kind of period rather than a few days.

For a broader comparison across brands and formats, see our best shilajit supplements guide, our Himalayan shilajit reviews, and shilajit gummies for a different format.

How This Review Was Updated

We rewrote this review on October 16, 2026 after an internal audit found errors in the first version, including incorrect doses for two cited studies and an outdated patent count. Product facts now come from Pürblack's own site, and each study figure comes from its PubMed abstract.

The first version described one trial as using 250 mg a day when the published dose was 250 mg twice a day, and described another as showing benefit at 250 mg when that dose did not differ from placebo. It also cited a fertility study and a preclinical cognition paper that we have removed because they did not fit the scope of a product review. The patent count has been updated from five to the seven the company now lists.

YourHealthier sells a shilajit capsule, labeled as ours in the price table. Pürblack had no involvement in this article.

Avoiding Counterfeit and Gray-Market Jars

Buy Pürblack from its own store or a retailer it lists, check that the jar has a serial number, and be wary of prices far above or below the brand's list price. A 30 g jar listed for nearly double the official price, or deeply discounted from an unknown seller, is a warning sign.

Popular shilajit brands are copied. Resin is easy to fake visually, and most buyers cannot tell a purified product from a cheap one by sight or smell. That makes the purchase channel part of the quality decision.

When we searched, the 30 g True Gold jar was listed at $93.33 on Pürblack's site, around $93 to $99 at several wellness retailers, and $186.49 at one third-party store. A European distributor listed a 30 g jar at $120 to $123. Some of these differences reflect shipping and taxes. Others reflect resellers with no connection to the brand. High prices do not guarantee authenticity, and very low prices should raise questions.

Pürblack says each jar has an individual serial number linked to its database. If yours does not, or the number does not check out, contact the company before using it. Keep the jar's label and receipt until you have confirmed it.

Living With a Resin

Resin takes a little more effort than a capsule. Measure with the included tool, dissolve it in a warm drink, and store the jar at room temperature. Splitting the daily amount into two smaller servings mirrors how several trials dosed shilajit.

The Pürscale that comes with the jar is meant to make measuring repeatable. Use it consistently rather than estimating by eye, because a "pea-sized" piece varies a lot from person to person and day to day.

Warm water, tea or warm milk all work. Stir until the resin dissolves, which usually takes a minute. Some people find the taste strong at first; tea or a little honey softens it.

Resin travels less conveniently than capsules. The jar is small, but it needs a warm drink and a minute to dissolve. People who travel often sometimes switch to a capsule product on the road and back to resin at home. That is a reasonable compromise if both products are purified and tested.

Trials split daily amounts across morning and evening in several cases. If you notice that shilajit in the evening affects your sleep, keep it to the first half of the day.

Pürblack Shilajit FAQ

These answers cover testing, dose, the gold infusion and how Pürblack compares with capsule extracts, based on the company's site and the studies linked above.

Is Pürblack shilajit third-party tested?

Pürblack says every batch is screened by NSF for heavy metals, microbial contamination and purity, checked again internally, and published as a public certificate. Match the batch on your jar to the certificate on the company's site.

How much Pürblack should I take?

The 30 g jar is sold as 60 servings, about 0.5 g each. That is close to the 500 mg a day used in most controlled shilajit trials (Keller et al., 2019). Many people start lower and work up.

Is resin better than shilajit capsules?

Not on current evidence. The placebo-controlled trials most often cited used purified extract in capsules. Resin has a smaller evidence base, including an uncontrolled 2026 pilot. Purification and testing matter more than form.

What does the gold in True Gold do?

No human study has tested it. A 0.5 g serving contains about 278 micrograms of gold at the stated 555 ppm. Choose Research Grade if you prefer resin without added metals.

Where is Pürblack made?

Pürblack says its products are made in the USA. The company describes its raw shilajit as coming from various high-altitude regions of the world; some retailers describe it as Himalayan.

What are the ingredients in True Gold?

The product page lists purified shilajit resin and gold. No sweeteners, carriers, flavors or animal-derived ingredients are listed, which keeps the label short and easy to check.

How do I take shilajit resin?

Dissolve a serving in warm water, tea or milk and drink it. Keep the jar closed at room temperature, since resin hardens in the cold and softens in heat. Our What Is Shilajit? guide covers the basics, and shilajit benefits for men covers the hormone research.