Humic acid for people: what is worth knowing

Humic acid for people: the term comes up more and more often, but it rarely reveals what is actually in the box. This article is not about effects, but about what can be learned from the label and from manufacturing: where humic acid comes from, what the humic acid content percentage means, what the difference between powder and capsule is, and what is worth looking at on the packaging of a food supplement.

What humic acid is and where it comes from

Humic acid is not a single compound but a mixture of large-molecule organic substances formed during the decomposition of plant remains over millions of years, a process called humification. Humic substances are traditionally classified by solubility: humic acid dissolves in alkaline media and precipitates in acidic ones, fulvic acid stays in solution at every pH, humin is practically insoluble.

The raw material of products intended for human consumption is typically leonardite: a soft, heavily oxidised type of brown coal with a particularly high humic substance content. Leonardite is a mined mineral raw material, not a plant extract and not a synthetic chemical. How much of the usable fraction ends up in a product is determined by the deposit and the processing, not by the brand name.

Why the humic acid content matters

The amount shown on the packaging (for example 35 grams of net filling) and the humic acid content percentage are two different things. If a product states only the weight of the filling, it does not reveal how much of it is actual humic substance. A "minimum 50% humic acid" marking therefore says more than a larger-looking gram figure with no content declaration.

The other, less frequently declared property is solubility. Leonardite on its own dissolves poorly; a readily water-soluble form is the result of a separate processing step. If the label states this as well, that is one more verifiable claim.

Powder or capsule: what the difference is in practice

The same filling can go into a sachet as powder or into a capsule. The difference is not in the substance but in the dosing and in where it opens up.

• Powder: it can be dosed freely, but it has to be measured, and the dark colour and earthy taste of humic acid are directly noticeable.
• Capsule: a pre-measured amount with no taste. Here, though, what the capsule shell is made of matters.

The capsule shell is interesting from two angles. One is the material: gelatine is of animal origin, while hydroxypropyl methylcellulose (HPMC) is plant-based and therefore fits a vegan diet as well. The other is the coating: a conventional capsule opens in the stomach, while a capsule with an enteric coating resists stomach acid and breaks down only in the more alkaline environment of the small intestine. We wrote about this difference separately: stomach or small intestine soluble humic acid capsules.

How to read a food supplement label

Five data points needed for a comparison, which a proper label provides:

• Net filling weight in grams, not just the number of capsules.
• Capsule count and daily dose — from this you can calculate how many days one box lasts.
• Humic acid content as a percentage or per serving.
• The material of the capsule shell (gelatine or plant-based), and whether it is enteric.
• Manufacturer and distributor name and address, as well as the batch number.

If several of these are missing, that in itself is information: the prices of two products can only be compared when they are related to the same content.

Storage and shelf life

Humic acid preparations keep well when stored dry, at room temperature, protected from light and in a well-sealed package. The resealable box is therefore not decoration: it is moisture that makes the powder clump. The best-before date and the batch number should always be looked for on the packaging.

Frequently asked questions

Is humic acid for people the same as agricultural humic acid? The raw material is related, but the requirements are not. For a product intended for human consumption, food safety rules apply to the raw material, to contaminant limits and to manufacturing conditions. A preparation intended for soil improvement is therefore not interchangeable with a food supplement.

What does "min. 50%" on the label mean? That at least half of the filling is humic substance. The rest consists of the other components of the mineral raw material.

Is the capsule vegan? Only if the capsule shell is plant-based. A gelatine capsule is of animal origin, which is stated on the label.

A food supplement is not a medicine and does not replace a balanced, varied diet and a healthy lifestyle.