Advantame

What It Is

Advantame is the most potent sweetener on this site: FDA puts it at about 20,000 times sweeter than table sugar. That is roughly 100 times the sweetness of aspartame, from which it is made, and 33 times that of sucralose. In the EU it is E 969. In a finished product, the amount per serving is often measured in micrograms.

Like neotame, it is made from aspartame but carries no phenylketonuria (PKU) warning. Here an international expert committee addressed the question directly, rather than leaving it to be inferred from what a regulation leaves out.

Why There Is No PKU Warning

Advantame keeps the phenylalanine group of the aspartame molecule. Aspartame’s regulation makes a PKU warning mandatory; advantame’s, 21 CFR 172.803, has none. JECFA, the joint FAO/WHO expert committee, said why:

“The Committee agreed that the ADI also applies to those individuals with phenylketonuria, as the formation of phenylalanine from the normal use of advantame would not be significant in relation to this condition.”

The reasoning is the same as for neotame, taken further. At 20,000 times the sweetness of sugar, so little advantame is eaten that the phenylalanine it releases is negligible next to the 2.5 to 10 grams a day that ordinary food provides. This does not mean advantame contains no phenylalanine. If you manage PKU, work from your own clinical plan and the ingredient list, not from this page.

Regulatory Status

In the US, advantame is an approved food additive, codified at 21 CFR 172.803, next to aspartame at 172.804. It went through the full petition process; it is not a GRAS notification. FDA approved it in 2014 as a general-purpose sweetener and flavour enhancer in foods, except in meat and poultry. FDA reviewed 37 animal and human studies, covering immune, reproductive, developmental and nervous system effects, as well as how the body handles it and whether it causes cancer. That is a smaller body of studies than neotame’s 110 or more.

In the EU, advantame is authorised as E 969 under Commission Regulation (EU) 497/2014, which amended the EU’s additive rules specifically to permit it as a sweetener. EFSA assessed it in 2013 and concluded that advantame and its metabolites pose no safety concern at the proposed uses and use levels. That 2013 opinion is the most recent EFSA assessment in our record; there has been nothing like EFSA’s 2025 re-evaluation of neotame.

The ADI: Whose Number?

• FDA: 32.8 mg/kg of body weight per day
• JECFA: 5 mg/kg bw/day, set in 2013 and re-affirmed in 2015
• EFSA: 5 mg/kg bw/day

EFSA’s figure applies a 100-fold safety factor to the no-adverse-effect level of 500 mg/kg bw/day for digestive upset in pregnant rabbits, in a developmental toxicity study. We have that derivation from secondary reports of EFSA’s opinion, not from the opinion itself; JECFA’s independent arrival at the same 5 mg/kg supports the figure.

FDA’s figure is about 6.6 times higher, and we have not found how FDA derived it: its “Safe Levels of Sweeteners” chart states 32.8 without showing the study behind it. On neotame, FDA is about 6.7 times more cautious than JECFA. The same agency, two sweeteners made from aspartame, opposite directions, almost the same factor. Nothing we have found explains it. Whichever number you use, name whose it is.

In practice the limit is very hard to reach. FDA’s chart works out that a 60 kg person would need 4,920 sweetener packets a day to reach advantame’s ADI, against 75 for aspartame and 23 for sucralose.

Heat, Calories and Blood Glucose

FDA: advantame “is heat stable, meaning it stays sweet even when used at high temperatures during baking, making it suitable as a sugar substitute in baked goods.” Neotame shares this advantage over aspartame.

Advantame is used at less than a milligram per serving, so its calories and carbohydrate are effectively zero and it subtracts in full from net carbs. It adds no bulk, structure, browning or mouthfeel. Any retail product is essentially all carrier; count the carrier. Our record has no dedicated glucose, insulin or HbA1c trial. EFSA notes that advantame “was well tolerated in single or repeated doses up to 0.5 mg/kg bw/day by normo-glycemic or diabetic subjects”. That is a tolerability finding in people with diabetes, not evidence of any benefit to blood glucose.

Comparison Note

Against neotame: the other sweetener made from aspartame, about 1.5 to 3 times as potent, with a thinner study base, an older EU assessment, and FDA’s ADI disagreement running the other way. Against aspartame: about 100 times as potent, heat stable, and with no PKU warning. Against acesulfame potassium and sucralose: all are heat-stable high-intensity sweeteners with full food-additive approval, and advantame is by far the most potent of them.

Advantame is approved in the US and the EU with no unresolved safety signal. You are unlikely to meet it often, and at the amounts used its ADI is far out of reach.