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Monster Energy Lo-Carb
Photo: Open Food Facts contributors (CC BY-SA)

Sodas

Monster Energy Lo-Carb

16 oz

Poor out of 100 Medium confidence
  • Ultra-processed
  • Contains non-nutritive sweeteners
  • Contains added sugars
  • Contains caffeine
  • No synthetic dyes
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Why it scores 30

Monster Energy Lo-Carb scores 30 out of 100 (Poor) under GoodSwap’s published rules. What moved the score most:

  1. Corn syrup: An added sugar. Strong
  2. Ultra-processed (NOVA 4): Classified NOVA 4: made with industrial ingredients and additives. Strong
  3. Sucralose: In a 2022 randomized study, sucralose and saccharin altered the gut microbiome and impaired glucose responses in some people; a 2023 lab study raised questions about its by-product sucralose-6-acetate. Strong

Every line of the math is on The Receipt below, with its evidence tier and sources.

Better energy drinks

The same kind of product, at least 10 points higher, sold in the US. Never paid placements.

The Receipt

Monster Energy Lo-Carb

START100

Ingredients

  • Corn syrup
    Strong An added sugar. [1][2][3]
  • Sucralose
    Strong In a 2022 randomized study, sucralose and saccharin altered the gut microbiome and impaired glucose responses in some people; a 2023 lab study raised questions about its by-product sucralose-6-acetate. [4][5][6][7][2]
  • Benzoic acid
    Strong Benzoates can form small amounts of benzene in drinks that also contain ascorbic acid (vitamin C), especially with heat or light. [8]
  • Acesulfame potassium (Ace-K)
    Strong In the NutriNet-Santé cohort, acesulfame-K intake was associated with higher cancer risk; cause and effect is not established. [9][10][7][2]
  • Natural flavors
    Info "Natural flavor" is a legal category (21 CFR 101.22(a)(3)): flavor substances from spices, fruits, vegetables, meat, dairy or fermentation. [11][12]
  • Color added (not named)
    Info 21 CFR 101.22(k) requires certified color additives (FD&C dyes and their lakes) to be declared by name. [13][12]
  • Caffeine
    Strong The FDA cites 400 mg a day as generally safe for most adults; EFSA advises no more than 200 mg a day in pregnancy. [14][15]
  • Sorbic acid
    Strong EFSA (2019) set a group ADI of 11 mg/kg body weight per day for sorbic acid and potassium sorbate. [16]
  • Maltodextrin
    Info An additive class typical of ultra-processed foods (NOVA group 4). [12]
subtotal−43.5

Processing

  • Ultra-processed (NOVA 4)
    Strong Classified NOVA 4: made with industrial ingredients and additives. [12]
  • 4 kinds of ultra-processing markers
    Emerging Industrial additive classes found: color (added), flavoring, industrial sugar or starch hydrolysate and non-nutritive sweetener. [12]
subtotal−22.5

Nutrition per 100 ml

  • Sugars 1.3 g / 100 ml
    Strong Contains some sugar. [1]
  • Energy 6 kcal / 100 ml
    Info Energy-dense for its volume. [2]
subtotal−4
TOTAL 30Poor

100 − 70 = 30

Can’t score above 79. Contains corn syrup, an ingredient of high concern. [1][2][3]

GTIN 00070847811268 · 2026-02-25

score v1.3.0 · kb 2026.10.11

Medium confidence

Same product, same score. Every time.

Nutrition per 100 ml

Energy6 kcal
Fat0 g
Saturated fat0 g
Carbohydrates1.3 g
Sugars1.3 g
Protein0 g
Salt0.2 g

Serving: 8 OZA (240 ml)

Ingredients

High Moderate Not recognized Tap an ingredient for its evidence and rules.
Label text, as published

CARBONATED WATER, GLUCOSE, CITRIC ACID, NATURAL FLAVORS, TAURINE, SODIUM CITRATE, COLOR ADDED, PANAX GINSENG EXTRACT, CAFFEINE, SORBIC ACID (PRESERVATIVE), SUCRALOSE, BENZOIC ACID (PRESERVATIVE), L-CARNITINE L-TARTRATE, NIACINAMIDE (VIT. B3), ACESULFAME POTASSIUM, SALT, D-GLUCURONOLACTONE, INOSITOL, GUARANA EXTRACT, PYRIDOXINE HYDROCHLORIDE (VIT. B6), RIBOFLAVIN (VIT. B2), MALTODEXTRIN, CYANOCOBALAMIN (VIT. B12).

Allergens and diets

  • Palm-oil-free

Always check the package: recipes change.

Healthiest sodas in the US

More from Monster

Sources

  1. Guideline: sugars intake for adults and children

    World Health Organization · Mar 4, 2015 · Agency assessment

    “In both adults and children, WHO recommends reducing the intake of free sugars to less than 10% of total energy intake”

    who.int

  2. Dietary Guidelines for Americans, 2025–2030

    U.S. Department of Health and Human Services and U.S. Department of Agriculture · January 2026 · Regulator

    “Limit foods and beverages that include artificial flavors, petroleum-based dyes, artificial preservatives, and low-calorie non-nutritive sweeteners.”

    cdn.realfood.gov

  3. Added and free sugars should be as low as possible

    European Food Safety Authority · Feb 28, 2022 · Agency assessment

    “Sugar consumption is a known cause of dental caries.”

    efsa.europa.eu

  4. Personalized microbiome-driven effects of non-nutritive sweeteners on human glucose tolerance

    Cell · September 2022 · Peer-reviewed

    “As groups, each administered NNS distinctly altered stool and oral microbiome and plasma metabolome, whereas saccharin and sucralose significantly impaired glycemic responses.”

    doi.org

  5. Toxicological and pharmacokinetic properties of sucralose-6-acetate and its parent sucralose: in vitro screening assays

    Journal of Toxicology and Environmental Health, Part B · Aug 18, 2023 · Peer-reviewed

    “Sucralose-6-acetate significantly increased the expression of genes associated with inflammation, oxidative stress, and cancer”

    doi.org

  6. EFSA finds sucralose safe when used as currently authorised; cannot confirm safety of extending its use

    European Food Safety Authority · Feb 17, 2026 · Agency assessment

    “EFSA’s experts concluded that the sweetener sucralose (E 955) continues to be safe for consumers for its currently authorised uses as a food additive.”

    efsa.europa.eu

  7. WHO advises not to use non-sugar sweeteners for weight control in newly released guideline

    World Health Organization · May 15, 2023 · Agency assessment

    “The recommendation is based on the findings of a systematic review of the available evidence which suggests that use of NSS does not confer any long-term benefit in reducing body fat in adults or children.”

    who.int

  8. Benzene production from decarboxylation of benzoic acid in the presence of ascorbic acid and a transition-metal catalyst

    Journal of Agricultural and Food Chemistry · May 1993 · Peer-reviewed

    doi.org

  9. Artificial sweeteners and cancer risk: Results from the NutriNet-Santé population-based cohort study

    PLOS Medicine · Mar 24, 2022 · Peer-reviewed

    “In this large cohort study, artificial sweeteners (especially aspartame and acesulfame-K), which are used in many food and beverage brands worldwide, were associated with increased cancer risk.”

    doi.org

  10. Re-evaluation of acesulfame K (E 950) as food additive (plain language summary)

    European Food Safety Authority · Apr 30, 2025 · Agency assessment

    “The acceptable daily intake (ADI) considered safe for all population groups was set at 15 mg/kg body weight (bw) per day.”

    efsa.europa.eu

  11. 21 CFR 101.22 Foods; labeling of spices, flavorings, colorings and chemical preservatives

    Electronic Code of Federal Regulations (eCFR), U.S. Office of the Federal Register · Dec 19, 2016 · Law

    “whose significant function in food is flavoring rather than nutritional.”

    ecfr.gov

  12. Ultra-processed foods: what they are and how to identify them

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  13. 21 CFR 101.22(k) Declaring color additives in the ingredient list

    Electronic Code of Federal Regulations (eCFR), U.S. Office of the Federal Register · Dec 19, 2016 · Law

    “Color additives not subject to certification and not otherwise required by applicable regulations in part 73 of this chapter to be declared by their respective common or usual names may be declared as “Artificial Color,” “Artificial Color Added,” or “Color Added””

    ecfr.gov

  14. Spilling the Beans: How Much Caffeine is Too Much?

    U.S. Food and Drug Administration · Regulator

    “For most adults, the FDA has cited 400 milligrams* a day — that's about two to three 12-fluid-ounce cups of coffee — as an amount not generally associated with negative effects.”

    fda.gov

  15. Caffeine (EFSA topic page; Scientific Opinion on the safety of caffeine, 2015)

    European Food Safety Authority · May 27, 2015 · Agency assessment

    “Caffeine intakes from all sources up to 200mg per day consumed throughout the day do not raise safety concerns for the foetus.”

    efsa.europa.eu

  16. Opinion on the follow-up of the re-evaluation of sorbic acid (E200) and potassium sorbate (E202) as food additives

    European Food Safety Authority · Mar 1, 2019 · Agency assessment

    “By applying a default uncertainty factor of 100, the Panel established a group ADI expressed as 11 mg sorbic acid/kg bw per day for sorbic acid (E 200) and its potassium salt (E 202).”

    doi.org

  17. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses

    BMJ · Feb 28, 2024 · Peer-reviewed

    “Greater exposure to ultra-processed food was associated with a higher risk of adverse health outcomes, especially cardiometabolic, common mental disorder, and mortality outcomes.”

    doi.org

  18. Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake

    Cell Metabolism · July 2019 · Peer-reviewed

    doi.org

  19. Regulation (EU) No 1169/2011, Annex III point 4.1 (beverages with high caffeine content)

    European Union (Official Journal) · Oct 25, 2011 · Law

    “‘High caffeine content. Not recommended for children or pregnant or breast-feeding women’”

    eur-lex.europa.eu