This is the single most useful skill for evaluating any supplement, and it takes about ten seconds once you know what to look for. It's also the reason HorseFil's label is worth more attention than most of its category.
A dosed label lists every active ingredient with its own milligram amount:
Tongkat Ali 200 mg · Horny Goat Weed 100 mg · Beet Root 50 mg · Grape Seed Extract 50 mg
A proprietary blend lists the ingredients but gives one combined figure:
Proprietary Blend 430 mg: Chicory Root, Babchi, Fennel, Fenugreek, Ginger, Lemon Balm, Lion's Mane, Slippery Elm, Dandelion
Both are legal. Both appear on reputable products. But they give you completely different amounts of information.
Take that 430 mg blend across nine ingredients. That could be:
From the outside, all three look identical on the label. There is no way to tell, and no obligation to say.
The stated reason is formula protection — stopping competitors copying the exact ratios. That's a real commercial concern and not automatically dishonest.
The unstated reason, in some cases, is label dressing: including a trace amount of an impressive-sounding ingredient so it can appear on the panel, without paying for a meaningful dose. Both motivations produce identical-looking labels.
On the transparent side. The best-documented HorseFil panel publishes individual amounts — Tongkat Ali 200 mg, Horny Goat Weed 100 mg, Beet Root 50 mg, Grape Seed 50 mg — which lets you do exactly the comparison above yourself.
That's the strongest single argument in the product's favour, and it's worth weighing against the things that count against it. Notably, a different product also sold under the HorseFil name does use an 82 mg proprietary blend — another reason to check the panel on the bottle you receive. See the verify-first section.
Standardisation. "200 mg Tongkat Ali" doesn't specify eurycomanone content; "ashwagandha 500 mg" doesn't specify withanolide percentage. Two products with identical milligram figures can differ substantially in active content.
If that matters to you, ask the brand in writing. A company confident in its sourcing will usually answer.
Read next: HorseFil's full label, or the research behind its largest dose.