Fulvic Acid in Shilajit: What It Is and What the Research Shows

Fulvic acid is the main active group of compounds in Shilajit (salajeet), part of the humic substances that make up most of its weight. Lab and animal studies link it to lower inflammation and to protecting a brain protein, but human evidence is thin. Fulvic acid percentages on labels are hard to compare, because labs measure them in different ways.

Read any Shilajit (salajeet) label and fulvic acid will be on it, often with an impressive percentage. It is the compound most often credited with Shilajit’s effects. This article explains what fulvic acid is, why the numbers are hard to compare, and what research has and has not shown. (Our own lab reports did not measure fulvic acid, so we do not quote a percentage.)

What fulvic acid is

When plants decay over a very long time, they leave behind humic substances: large, complex carbon molecules found in soil, peat and, in concentrated form, in Shilajit. They are usually split into humic acid (larger molecules that do not dissolve in acid) and fulvic acid (smaller molecules that dissolve in water at any pH). Research reviews describe Shilajit as more than 80% humic substances by weight, with the rest mostly minerals such as calcium, potassium and magnesium (Kamgar et al., 2025).

Fulvic acid binds minerals, which is why it is often described as a “carrier”. Scientists think it, together with the smaller dibenzo-alpha-pyrones, explains most of Shilajit’s activity (Stohs, 2014). Read more about those smaller compounds in DBPs and DCPs in Shilajit.

Why fulvic acid percentages are hard to trust

There is no single standard test for fulvic acid in Shilajit. Different methods give very different numbers for the same sample, so “75% fulvic acid” from one seller and “20%” from another may not mean what they seem. A percentage is worth something only if a lab report shows it and names the method. Our own reports, from Midwest Laboratories and Eurofins, did not measure fulvic acid, so we do not quote a figure. More on reading reports: how to read a Shilajit lab report.

What research has found

Inflammation

In laboratory and animal studies, fulvic acid and Shilajit extracts have shown antioxidant and anti-inflammatory activity. These results come from cells and animals, at controlled doses. No human trial has shown that Shilajit treats an inflammatory disease, and reviews call for better human studies (Wilson et al., 2011).

Blood sugar and cholesterol

The human evidence is small and mixed:

• In healthy volunteers taking 2 g a day for 45 days, triglycerides and cholesterol went down and HDL (“good” cholesterol) went up (Sharma et al., 2003).
• In overweight adults taking 250 mg twice a day for 8 weeks, blood sugar and cholesterol did not change (Das et al., 2016).

Neither study was in people with diabetes, and neither is enough to say Shilajit lowers blood sugar. If you have diabetes, keep to your treatment and talk to your doctor before adding any supplement.

The brain

In a laboratory study, fulvic acid from Shilajit stopped tau protein from clumping, a process linked to Alzheimer’s disease (Carrasco-Gallardo et al., 2012). That is an early lab finding, not a treatment. See Shilajit and brain health.

What this means if you take Shilajit

• Choose purified resin with a lab report, rather than chasing the highest fulvic acid number on a label.
• Expect a supplement, not a medicine. The best human evidence is for energy, strength and bone health, summarised in Shilajit benefits: what the research says.
• Take a usual dose of 300 to 500 mg a day: see how to take Shilajit.

The bottom line

Fulvic acid is a real and interesting part of Shilajit, and early research is promising. But the claims that it treats inflammation or diabetes go well beyond the evidence. For the full picture, start with the complete guide to Himalayan Shilajit.

New to Shilajit? Start with the complete guide to Himalayan Shilajit.