MSG

The Flavor Compound a 1968 Prank Letter Turned Into Decades of Scientific Racism

In spring 1907, Japanese chemist Kikunae Ikeda noticed the same unidentifiable taste he’d encountered in tomatoes, asparagus, meat, and cheese while studying in Germany was present in a kombu-dashi broth his wife had prepared. He spent the year boiling down roughly 90 lbs of kelp, isolating about one ounce of brown crystals, and by 1908 had identified the compound as glutamate and named the taste itself umami — proposing it as a distinct basic taste alongside sweet, salty, sour, and bitter. By 1909 he’d worked out how to combine glutamate with sodium for commercial stability, and partnered with entrepreneur Saburosuke Suzuki II, who founded what became Ajinomoto to sell it as “AJI-NO-MOTO” — literally “essence of taste.”

Two other products built the modern seasoning-cube category, both Swiss. Maggi’s founder began selling flour products from his family’s Kemptthal mill in the early 1880s, developing pulse-flour foods and then a liquid seasoning sauce (1886) and bouillon cube (1908) — driven, per a documented 1882 paper by physician Fridolin Schuler to the Swiss Common Good Society, by real concern that factory-working women no longer had time to cook proper meals for their families. Nestlé acquired Maggi in 1947, and it’s now a kitchen staple across Africa, Asia, and Latin America. Knorr’s Aromat launched in 1952 in Thayngen, Switzerland, and became — genuinely, not just as an export footnote — “South Africa’s national spice” as much as a Swiss one, seasoning braai meat and chakalaka across every social class in that market.

In the Professional Kitchen

The three product families work differently and cost differently. Pure crystalline MSG delivers the cheapest umami per gram because nothing dilutes it — no salt, fat, or dried vegetable carrier. Bouillon cubes and stock powders are formulated blends: salt as the largest ingredient by weight, plus fat, dried vegetables, and either MSG or hydrolyzed protein, ideally combined with disodium inosinate and/or guanylate — the ribonucleotides that amplify glutamate’s umami signal by a documented, peer-reviewed 8-fold or more when paired together, the same principle behind why Japanese dashi combines glutamate-rich kombu with inosinate-rich katsuobushi. Liquid seasoning sauces like Maggi’s are not soy sauce despite the resemblance — the base is hydrolyzed vegetable protein (historically acid-hydrolyzed soy in the German/Swiss formula, reformulated around 2006 to enzyme-hydrolyzed wheat), a chemically distinct product that lands in a similar flavor space. Seasoning salts like Aromat are dry blends built around iodized salt as the largest component, MSG second, plus starches, yeast extract, dried onion and garlic, dried porcini, and turmeric for color.

Varieties & Forms

For a costing decision, the spread matters more than the flavor difference. Bouillon cubes and seasoning salts cost more per kg of umami delivered than pure MSG because a large share of their weight is salt, starch, and dried vegetable filler rather than flavor-active compound — but they buy portion consistency and a rounder flavor via the nucleotide synergy effect. “Clean label” alternatives — yeast extract, mushroom powder (dried shiitake and porcini run roughly 1,060–1,680 mg free glutamate per 100g, a genuinely high natural concentration), or kombu-based dashi — cost meaningfully more per kg of delivered umami than MSG or MSG-blended cubes, not less, despite reading as the “natural” choice.

Why It Matters for Your Food Cost

MSG is fermented, not chemically synthesized — worth getting exactly right since it directly answers “is MSG natural?” Industrial production feeds a carbohydrate source (corn starch, sugarcane or beet molasses, or cassava starch) to the bacterium Corynebacterium glutamicum, which excretes glutamic acid as a fermentation byproduct — essentially the same biological process as brewing or yogurt-making, just optimized for a different output. China supplies more than 60% of world MSG output, with Fufeng Group alone estimated at roughly 31% of global volume; Ajinomoto remains the largest single branded producer at over 18% global share but is outproduced in raw volume by Chinese industrial fermentation plants. Unlike sugar, coffee, or cocoa, there is no futures or commodity-exchange market for MSG or bouillon cubes — pricing is set by individual manufacturers and direct industrial-buyer contracts, not exchange-traded price discovery, so there’s no single number to watch the way there is for a true commodity.

The “clean label” trend is a genuine cost-versus-marketing tension worth flagging on a spec sheet: because MSG’s health case is scientifically weak but its reputational damage persists, “No Added MSG” is sellable as a premium claim on ingredients that cost more to buy, not less — one industry estimate puts MSG-free bouillon reformulations at 25–60% higher retail prices than conventional versions delivering umami through the same free-glutamate chemistry. That reputational damage has a specific, well-documented origin: a letter published in the New England Journal of Medicine on 4 April 1968, signed “Robert Ho Man Kwok,” speculatively linked symptoms to eating at Chinese restaurants and MSG specifically. It was a speculative letter to the editor, not a peer-reviewed study, yet it generated a decades-long health scare attached to one national cuisine. The letter’s authorship is now seriously disputed — a retired surgeon later claimed he wrote it as a prank, though NPR’s investigation left the question formally unresolved — but regardless of who wrote it, the underlying science never supported a real “syndrome,” and multiple food-history retrospectives describe how it functioned as a form of scientific racism: the same compound sitting in Western-branded products like Doritos, canned soup, and Parmesan cheese drew no comparable panic. The US FDA classifies MSG as Generally Recognized As Safe; the EU’s EFSA set a group Acceptable Daily Intake in a 2017 re-evaluation and found no grounds to restrict normal use. EU kitchens do need to know that added MSG must be declared as “monosodium glutamate” or E621 under mandatory food-additive labeling rules.

How CalcMenu Helps

• Recipe costing distinguishes pure MSG, bouillon-cube blends, and clean-label alternatives as separately priced line items, so a menu’s seasoning cost reflects which product is actually delivering the umami, not a single generic “seasoning” cost.
• Substitution costing models an MSG-to-clean-label swap side by side on cost-per-portion, so a “No Added MSG” menu claim is a documented pricing decision rather than an unbudgeted cost increase.
• Allergen and ingredient tracking flags E621 declarations on supplier specs for European operations, keeping labeling compliant without manual panel-checking.
• Multi-site price consistency surfaces when one location pays a materially different rate for the same seasoning product, useful given how much branded seasoning pricing can vary by supplier and market.

Sources

• Kikunae Ikeda - Wikipedia
• Who Identified Umami and When? - Ajinomoto Group
• History - Ajinomoto Group
• Monosodium Glutamate (MSG) Market Size - Grand View Research
• Julius Maggi - Wikipedia
• Maggi noodles safety concerns in India - Wikipedia
• Aromat: on (almost) every Swiss table for 70 years - SWI swissinfo.ch
• Aromat, from Switzerland to the townships of South Africa - SWI swissinfo.ch
• The Robert Ho Man Kwok letter, 4 April 1968 (full text, hosted copy)
• The Rotten Science Behind the MSG Scare - Science History Institute
• 668: The Long Fuse - This American Life (NPR)
• Questions and Answers on Monosodium glutamate (MSG) - FDA
• Fufeng Group - Wikipedia
• Clean label yeast extract as MSG alternative - FoodNavigator/Angel Yeast