How Much Caffeine Is in NOS? Every Can and Flavor
A 16 fl oz can of NOS Original has 160 mg of caffeine, per NOS's own product page. The 24 fl oz can has 240 mg. NOS Zero Sugar, Sonic Sour, and Grand Prix Guava list 200 mg per 16 oz can. In Canada, that same 710 mL (24 fl oz) Original can lists just 180 mg.
Caffeine in Every NOS Can
| NOS product | Can size | Caffeine | mg per fl oz | Source |
|---|---|---|---|---|
| NOS Original (US) | 16 fl oz | 160 mg | 10.0 | drinknos.com |
| NOS Original (US) | 24 fl oz | 240 mg | 10.0 | US page: "160mg - 240mg" across sizes |
| NOS Zero Sugar (US) | 16 fl oz | 200 mg | 12.5 | drinknos.com |
| NOS Sonic Sour (US) | 16 fl oz | 200 mg | 12.5 | drinknos.com |
| NOS Grand Prix Guava (US) | 16 fl oz | 200 mg | 12.5 | drinknos.com |
| NOS GT Grape (US) | 16 fl oz | 160 mg | 10.0 | drinknos.com |
| NOS Original (Canada) | 473 mL / 16 fl oz | 160 mg | 10.0 | drinknos.com Canada |
| NOS Original (Canada) | 710 mL / 24 fl oz | 180 mg | 7.5 | drinknos.com Canada |
| NOS Zero Sugar (Canada) | 473 mL / 16 fl oz | 200 mg | 12.5 | drinknos.com Canada |
Source: drinknos.com US and Canada product pages; mg per fl oz computed. Labels change; check the can you are holding.
Why the 24 oz NOS Lists 240 mg in the US but 180 mg in Canada
NOS's US page lists the Original at 160 to 240 mg across its two can sizes. The Canadian page lists 180 mg for the 710 mL can. Both containers are effectively the same volume (24 fl oz = 709.8 mL), yet the caffeine differs by 60 mg. NOS does not explain the gap on either page.
Does NOS Zero Sugar Have More Caffeine Than Original?
Yes: Zero Sugar lists 200 mg per 16 oz can, 40 mg above Original's 160 mg, on NOS's own page. Some grocery listings print a different figure; the can's label is the final word.
Is NOS Stronger Than Monster or Red Bull?
A 16 oz NOS Original matches Monster Original at 160 mg. NOS Zero Sugar, Sonic Sour, and Grand Prix Guava sit 40 mg higher at 200 mg. Red Bull's 8.4 fl oz can holds 80 mg, so one NOS Original contains double that caffeine in double the liquid. Per fluid ounce, NOS Zero Sugar (12.5 mg) is stronger than NOS Original (10.0 mg). See the full energy drink caffeine chart for more brands.
How Many Cans of NOS Reach 400 mg?
| Can | Caffeine | Cans to 400 mg |
|---|---|---|
| NOS Original 16 fl oz | 160 mg | 2.5 |
| NOS Zero Sugar / Sonic Sour 16 fl oz | 200 mg | 2.0 |
| NOS Original 24 fl oz (US) | 240 mg | 1.7 |
Formula: 400 / caffeine per can. The FDA cites 400 mg a day as the amount not generally linked to negative effects for most healthy adults, across all caffeine sources. Around 1,200 mg consumed rapidly is where the FDA estimates toxic effects like seizures can appear. Pregnant or breastfeeding? Talk to your provider. Medical experts advise against energy drinks for children and teens.
What Else Is in NOS
NOS calls its formula the CMPLX 6 Energy Blend: caffeine, vitamins B6 and B12, taurine, inositol and guarana, per its US homepage. Flavors range from the Original's tropical citrus with mango-passionfruit notes to Sonic Sour's sour apple. The Canadian Original page lists 210 calories per 473 mL can and 320 calories per 710 mL can. Sugar grams for US cans are not published on NOS's product pages.
Who Should Skip NOS
- Anyone under 18
- Pregnant or breastfeeding individuals (talk to a provider)
- People sensitive to caffeine or with heart conditions
- Those on stimulant medications
- Do not mix energy drinks with alcohol
Related from Roon
- Which Energy Drink Has the Most Caffeine?
- How Much Caffeine Is in Monster?
- How Many Energy Drinks a Day Is Too Many?
Frequently Asked Questions
Does NOS still have 260 mg of caffeine?
NOS's current product pages list 160 to 240 mg for Original depending on can size, and 200 mg for Zero Sugar, Sonic Sour, and Grand Prix Guava. The 260 mg figure that circulates online does not appear on any current NOS page.
How much caffeine is in NOS Grand Prix Guava?
NOS lists Grand Prix Guava at 200 mg per 16 fl oz can, matching Zero Sugar and Sonic Sour. Confirm on the can, as listings can update.
How much caffeine is in NOS GT Grape?
NOS's GT Grape page lists 160 mg per 16 fl oz, the same as Original. GT Grape did not appear in NOS's 2026 product carousel, so stock may vary by location.
Who makes NOS?
NOS Energy Company, per the footer of drinknos.com.
Half a NOS, Spread Wider
A 16 oz NOS Original delivers 160 mg of caffeine in a single sitting. Roon puts 80 mg in one pouch, placed under the lip, paired with 60 mg L-theanine, 25 mg methylliberine (Dynamine), and 5 mg theacrine (TeaCrine). The tradeoff: a smaller peak, but a longer tail.
Methylliberine slows caffeine clearance. In a randomized, double-blind, crossover PK study (n=12), co-administering methylliberine with caffeine extended caffeine's half-life from 7.2 to 15 hours without raising peak concentration (study). That study dosed 100 mg methylliberine and 150 mg caffeine, roughly 4x and 1.9x what one Roon pouch contains, so the direction of the effect applies but the exact numbers do not transfer. A 15-hour half-life is a blood measurement, not 15 hours of alertness; expect a pouch to carry you for roughly 6 to 8 hours, where a NOS front-loads everything into one can.
Two pouches at once bring you to 160 mg, the same as a NOS Original. Cap your day at 4 pouches and 400 mg total from all caffeine sources. Because the effect lasts longer, allow 8 hours between your last pouch and bedtime. Zero sugar (contains sucralose), zero nicotine, from $9.16 per tin. Try Roon.
Sources
- NOS Original (US)
- NOS Zero Sugar (US)
- NOS Sonic Sour (US)
- NOS Grand Prix Guava (US)
- NOS GT Grape (US)
- NOS Original (Canada)
- NOS Zero Sugar (Canada)
- FDA: Spilling the Beans: How Much Caffeine is Too Much?
Written by Roon Team
