Garlic vs. Ginger: Unrelated Plants, Different Pungent Chemistry, Frequent Partners

Garlic and ginger can’t stand in for each other, which is exactly why so many recipes use both. They’re unrelated plants that just happen to share a lot of pans: garlic is a bulb in the onion genus, ginger a rhizome in the family of turmeric and galangal. Their bite comes from different chemistry, too. Garlic’s sharpness gets made on the cutting board, when an enzyme turns alliin into allicin;¹ ginger’s is already there, in gingerols and their dehydration products, shogaols.² Heat treats them differently as well: it tames garlic by stopping the reaction that makes its bite, while in ginger it turns one pungent compound into another.

Side by side

The two oil figures aren’t like for like: garlic’s is a share of the bulb, ginger’s a share of dried ginger. The production figures do line up, since both come from the same Spices Board table for the same year.⁶ For each on its own, see garlic and ginger.

Two kinds of pungency

Garlic’s is made when you cut it. Cutting or crushing releases the enzyme alliinase, which turns alliin into allicin; in crushed garlic the reaction is done within 10 to 60 seconds. Heat inactivates the enzyme.¹ So a whole clove roasted or simmered tastes mild and a raw minced one burns. America’s Test Kitchen found that heating whole cloves to 140°F or above took away much of the raw bite.⁴ Raw garlic has a powerful onionlike aroma and pungent taste.

Ginger’s is already there. The pungent principles are non-volatile phenolic compounds, starting with gingerol, and PROSEA credits the pungent taste to the gingerols and to shogaols, which it describes as dehydration products of gingerols. Heat drives that change. In a 2025 study of spray-dried ginger extract, 6-gingerol underwent dehydration during thermal processing.⁵ That was an industrial drying process, not a home kitchen, so it doesn’t tell you how a stir-fry changes ginger’s heat. Ginger’s smell comes from its essential oil, and drying lowers the oil’s monoterpene content and raises its sesquiterpene content.²

So heat tames garlic by stopping the reaction that makes its bite, while in ginger it turns one pungent compound into another. Different mechanisms, and nothing in these sources suggests one flavor can mimic the other.

How each is used

Garlic is overwhelmingly savory. It’s mainly a condiment for flavoring meat, fish and salads, fresh or dehydrated. The Woks of Life calls garlic a universal ingredient and a foundation for many of its recipes, and says most of its green vegetables are simply stir-fried with oil, garlic and salt.⁷ Minced garlic added to a hot pan too early can burn and turn acrid and bitter, so ATK adds it after the onions or other vegetables have softened.⁸

Ginger swings between savory and sweet. In Asia the fresh rhizome is an essential ingredient in many dishes, while the dried, powdered spice is more popular in European cooking. The Woks of Life says ginger is used extensively in Chinese cooking, and that Chinese or Indian groceries are good places to find it because both cuisines use a lot of it.⁷ Ginger oil flavors ginger beer and ginger ale. Ground dried ginger is used worldwide in home cooking and in processed foods, especially bakery products and desserts. In Europe and North America, think gingerbread, gingersnaps and spice cakes.

Together. Garlic and ginger are a standard pair in Chinese stir-fries and marinades and in Indian cooking, where they’re often pounded or blended into a paste. The two do different jobs: garlic brings sulfurous depth, ginger brings clean heat and brightness.

Can one stand in for the other?

No. Their pungency comes from different classes of compounds (sulfur compounds from an enzyme reaction in garlic, phenolic gingerols and shogaols in ginger).¹² You’ll see a tip repeated online: when a recipe calls for both and you’re missing one, double the other. No source backs it, and doubling garlic just makes a dish harsher, not more complete.

What to do instead: if a recipe calls for both, make it with the one you have at its original amount and accept a simpler flavor. Then look for a substitute for the missing one that does its job:

• Missing ginger: ground ginger, galangal or crystallized ginger, depending on the dish. See ginger substitutes, galangal vs. ginger and fresh vs. ground ginger.
• Missing garlic: garlic powder, dried minced garlic or garlic scapes. See fresh garlic substitutes and garlic powder vs. garlic.

Safety

Garlic in oil. If you make garlic oil for a dressing or marinade, or a garlic-and-ginger paste stored under oil, the garlic rule applies. UC Agriculture and Natural Resources warns that garlic in oil is an ideal environment for Clostridium botulinum, the bacterium that causes botulism. Don’t store garlic in oil at room temperature; refrigerate it for no more than 4 days, or freeze it. Commercial garlic-in-oil products are made under strict guidelines a home kitchen can’t reproduce.⁹

Supplements, not seasoning. Most health research on both is about supplements. NCCIH says garlic supplements may raise the risk of bleeding,¹⁰ and that ginger supplements may be safe to use during pregnancy.¹¹

Health claims

Ginger often gets credit for helping digestion. NCCIH’s summary is narrower: research shows ginger may help with nausea and vomiting in pregnancy, ginger supplements might help symptoms of knee osteoarthritis, and most studies of ginger for motion sickness haven’t found it helpful.¹¹ For garlic, NCCIH finds that supplements may lower total and LDL cholesterol a little in people with high cholesterol, and that eating garlic doesn’t seem to lower the risk of stomach cancer.¹⁰ Nothing here suggests either one treats or prevents disease at cooking amounts.

What isn’t known

• No source compares the pungency of garlic and ginger on a common scale.
• We found no study measuring how home cooking (as opposed to industrial drying) changes ginger’s gingerol and shogaol balance.
• No reference source documents the garlic and ginger pairing or a standard ratio for ginger-garlic paste.
• We found no dated, sourced price comparison.

Related

• Garlic, garlic powder and fresh garlic substitutes
• Ginger, ginger substitutes, is ginger spicy? and cooking with ginger
• Fresh vs. ground ginger, galangal vs. ginger and turmeric vs. ginger
• Too much garlic, too much ginger and how to dry garlic