Best Keto Sodas: Three Exact Colas, Three Different Labels

This page compares the exact US product pages for Zevia Cola, OLIPOP Vintage Cola from the 9g Fiber line, and Poppi Classic Cola. Zevia's page reports 0 g total carbohydrate per can, OLIPOP's reports 17 g total carbohydrate and 9 g dietary fiber per 355 mL can, and Poppi's reports 9 g total carbohydrate and 3 g dietary fiber per can. The comparison does not rank taste, ingredients, price, availability, or individual metabolic effects. The evidence was checked on September 9, 2026.

Compare label systems carefully

1. 1US label
2. 2Declared total carbohydrate
3. 3EU / UK label
4. 4Use the package in hand

The label comparison

Exact product	First-party label facts	Evidence limit
Zevia Cola	Per can: 0 calories, 0 g total carbohydrate, 0 g total sugar, 0 g protein, and 45 mg caffeine; the ingredients are carbonated water, natural flavors, stevia leaf extract, tartaric acid, caffeine, and citric acid	These values apply to the named Cola product and do not describe every Zevia flavor
OLIPOP Vintage Cola, 9g Fiber line	Per 1 can (355 mL): 50 calories, 17 g total carbohydrate, 9 g dietary fiber, 5 g total sugars, 2 g added sugars, and 50 mg caffeine; the page says to keep it refrigerated	Total carbohydrate minus dietary fiber is 8 g, but that arithmetic does not predict an individual's glucose or ketone response
Poppi Classic Cola	Per can: 35 calories, 9 g total carbohydrate, 3 g dietary fiber, 5 g total sugars, 3 g added sugars, and 40 mg caffeine	Total carbohydrate minus dietary fiber is 6 g; the current package remains the source to use if its values differ from this snapshot

Why the exact product matters

The earlier guide combined whole brand families even though flavors and product lines can have different serving sizes, formulations, and label values. This comparison stays with three named colas. In particular, the OLIPOP entry is the Vintage Cola page from the current 9g Fiber line, including its refrigerated-storage direction.

A nutrition panel can support a serving-size and composition comparison. It cannot establish flavor, value, or an individual's glucose or ketone response. No cans were purchased or sampled for this update, so this page makes no sensory recommendation.

Before buying

Match the flavor and package to the page you reviewed, then check the current serving size, Total Carbohydrate, Dietary Fiber, sugars, caffeine, ingredients, allergens, and storage directions. Prices and inventory can change at checkout and are not reproduced here.

For other drink categories, see the keto drinks guide. For packaged foods and snacks, see the store-bought products hub.

Article history

1. September 9, 2026Rebuilt the soda ranking as a three-SKU first-party label comparison and removed broad flavor, price, availability, glucose, and ketosis claims
2. August 21, 2026First published