DGL vs ordinary licorice comes down to one extraction step that removes glycyrrhizin, the compound that makes licorice taste sweet and act strangely in the kidney. Whole licorice root carries 2 to 9% of it by dry weight; commercial DGL is specified at 3% or less, with stricter grades running far lower. Same plant, same flavonoids, different safety file. It's the processing, not the plant.
What glycyrrhizin actually does
Glycyrrhizin is the sweet molecule, roughly 50 times sweeter than table sugar, and it's the reason licorice root shows up in candies, teas, and traditional throat formulas. It also blocks an enzyme called 11-beta-HSD2 that your kidney uses to switch cortisol off. Block it and your body holds sodium, sheds potassium, and drifts upward on the pressure scale. That mechanism is dose-dependent and slow, which is why one cup of licorice tea changes nothing, and also why habitual heavy users are the people regulators actually worry about.
Potassium is the quiet part.
People chasing digestive comfort used to chew whole-root tablets for weeks, and the ones who overdid it walked around with low potassium and ankles straining their socks. Water retention, puffy faces, headaches: the classic profile, all of it downstream of that one blocked enzyme. The flavonoids in the root, the fraction that interests digestive researchers, were never the problem. Glycyrrhizin was, and still is, whenever it shows up in quantity.
The 100 mg line regulators drew
European food safety authorities set the reference line at 100 mg of it per day, which works out to roughly 50 g of genuine confectionery licorice, the kind made with real root rather than anise flavoring. The European Medicines Agency goes further for licorice root itself: no more than four weeks of use without professional advice, and not in pregnancy. Those limits sound generous until you meet someone who eats 100 g of salted licorice daily, which in parts of Scandinavia isn't a confession, it's a Tuesday.
Blood pressure is where the concern concentrates, and it's a documented, reversible effect rather than a rumor. A systematic review covering 58 studies, plus case reports of people hospitalized after weeks of strong licorice tea: the file is thick. What you do with that file depends on your setup. If your blood pressure already runs high, or potassium-wasting diuretics are part of your routine, ordinary licorice is the last thing you add on your own.
DGL vs ordinary licorice, one step apart
Deglycyrrhizination isn't exotic chemistry. Extractors wash the root extract so glycyrrhizin partitions away, then standardize what remains, and commercial DGL is specified at 3% residual or less, with the stricter European herbal grades running near 0.1%. The 380 to 760 mg before-meal amounts you see on DGL labels come from monograph dosing, and the small human trials of deglycyrrhizinated material all used it precisely because they wanted the flavonoid fraction without the mineral side effects.
So the honest comparison, ingredient-nerd edition: same flavonoids, one compound gone, and most of the worry gone with it. DGL chewables still taste faintly sweet, which tells you how much character that one compound was carrying, since it supplied most of the root's sweetness on its own. If you want licorice as a nightly tea ritual, the whole root inside a four-week window is a reasonable thing. For an everyday companion, DGL is the version built for that job.
History explains the form's stubborn popularity. DGL shipped in European clinics decades ago, back when whole-root extracts kept producing the potassium problems above, and the processed version let researchers keep the flavonoid fraction in play without the side effects attached. Chewable tablets became the default delivery, since contact with saliva was part of the original routine, though capsules carrying the same standardized extract do the same chemistry. The extract is the active decision. The format is preference.
How to spot the real thing on a label
Front-of-pack marketing says "licorice" on both versions, so read the ingredient line instead. You want "deglycyrrhizinated licorice extract", sometimes abbreviated DGE, occasionally standardized to a flavonoid percentage, and the better brands print the residual spec outright. Red flags are easy to spot: "licorice root extract" with no D anywhere, or a chewable that tastes aggressively sweet, because properly made DGL is noticeably milder. And if a label brags about that content as a selling point, you're holding the ordinary kind, whatever the front of the box claims. That's the entire DGL vs ordinary licorice decision, compressed to one line of small print.
Frequently asked questions
What does DGL stand for?Show answerHide answer
Deglycyrrhizinated licorice, meaning glycyrrhizin has been removed.
Why remove it?Show answerHide answer
Glycyrrhizin is the part associated with blood pressure concerns at higher intakes.
Is ordinary licorice dangerous?Show answerHide answer
In large amounts over time, it carries well documented concerns. DGL sidesteps that particular issue.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
