Starbucks
How much caffeine is in Starbucks Strawberry Açaí Refresher?
Data checked against the source on 2026-10-03 by Oleksii Y.
One Grande, 16 fl oz of Starbucks Strawberry Açaí Refresher has 50 mg of caffeine, according to Starbucks Coffee Company.
How Starbucks Strawberry Açaí Refresher compares
- Strength: 11 mg per 100 ml.
- One Grande, 16 fl oz has as much caffeine as about half a cup of brewed coffee, which has 94.8 mg per 8 fl oz cup.
How much will be left at bedtime?
1 × Grande, 16 fl oz of Starbucks Strawberry Açaí Refresher
Left at 11:00 PM (8 h later), average metabolism
≈ 16 mg
Range 8–25 mg (fast to slow metabolism)
50 mg is already at or under the 50 mg this tool aims to have left at bedtime.
What sleep studies found near this dose
- Gardiner et al. 2025 (randomized trial): In 23 healthy young men, 100 mg taken 12, 8 or 4 hours before bed had no significant effect on measured or self-rated sleep.
- Gardiner et al. 2023 (meta-analysis): To avoid losing sleep time, the authors suggest a coffee (107 mg per 250 ml) at least 8.8 hours before bed.
Estimate from a simple model: half-life of 3, 5 or 8 hours, 50 mg bedtime target. How we calculate
Caffeine by size
| Serving | Caffeine |
|---|---|
| Grande, 16 fl oz | 50 mg |
| Tall, 12 fl oz | 25 mg |
| Venti, 24 fl oz | 75 mg |
| Trenta, 30 fl oz | 100 mg |
How long does Starbucks Strawberry Açaí Refresher stay in your system?
Our model halves caffeine every 5 hours for average metabolism, and every 3 or 8 hours for fast or slow metabolism. From one Grande, 16 fl oz of Starbucks Strawberry Açaí Refresher (50 mg), about 25 mg is still in your body 5 hours later and about 13 mg after 10 hours. If you clear caffeine slowly (an 8-hour half-life), about 21 mg is left after 10 hours.
Estimated caffeine left at 11:00 PM from one Grande, 16 fl oz (50 mg), using a half-life of 5 hours for average metabolism and 3 to 8 hours for the range. How we calculate
| Had at | Left at bedtime (average) | Range |
|---|---|---|
| 8:00 AM (15 h before bed) | ≈ 6 mg | 2–14 mg |
| 12:00 PM (11 h before bed) | ≈ 11 mg | 4–19 mg |
| 3:00 PM (8 h before bed) | ≈ 16 mg | 8–25 mg |
| 6:00 PM (5 h before bed) | ≈ 25 mg | 16–32 mg |
How many fit in a day?
Reference amounts are for caffeine from all sources combined. Counted at the upper end of the stated amount, one serving at a time:
- Up to 400 mg a day for most healthy adults (FDA, EFSA): about 8 servings.
- Up to 200 mg at one time for healthy adults (EFSA): about 4 servings in one go.
- Up to 200 mg a day in pregnancy (EFSA, NHS): about 4 servings.
These are reference amounts for groups of people, not a personal limit. Some people feel jittery or sleep worse on much less. See the cutoff calculator for timing.
Good to know
Starbucks also sells a Strawberry Açaí Energy Refresher, which lists 125 mg in a Grande.
Starbucks Strawberry Açaí Refresher vs other Starbucks Refreshers drinks
- Starbucks Strawberry Açaí Energy Refresher: Starbucks Strawberry Açaí Refresher has less caffeine than Starbucks Strawberry Açaí Energy Refresher per Grande, 16 fl oz: 50 mg vs 125 mg.
Common questions
How much caffeine is in Starbucks Strawberry Açaí Refresher?
Starbucks Coffee Company gives 50 mg of caffeine per Grande, 16 fl oz. Other sizes are in the table on this page.
How many Starbucks Strawberry Açaí Refresher servings can I have in a day?
The FDA and EFSA cite up to 400 mg of caffeine a day, from all sources combined, for most healthy adults. At 50 mg per Grande, 16 fl oz, that is about 8 servings if Starbucks Strawberry Açaí Refresher is your only source. In pregnancy the reference is 200 mg a day.
How late can I drink Starbucks Strawberry Açaí Refresher?
One serving has about 50 mg, which is at or under the 50 mg our calculator aims to have left at bedtime, so it sets no cutoff for a single serving. Several servings add up.
How long does Starbucks Strawberry Açaí Refresher stay in your system?
Of the 50 mg in one Grande, 16 fl oz, roughly 25 mg remains after 5 hours and 13 mg after 10 hours with our average 5-hour half-life. From fast to slow metabolism, 10 hours later it is between 5 and 21 mg.
Where the number comes from
- Strawberry Açaí Refresher. Starbucks Coffee Company. Nutrition "Caffeine" field for each size (Tall 25, Grande 50, Venti 75, Trenta 100 mg); page data from /apiproxy/v1/ordering/2121342/iced. Accessed 2026-10-02. Source ↗
- Strawberry Açaí Energy Refresher. Starbucks Coffee Company. Nutrition "Caffeine" field for each size (Grande 125 mg); page data from /apiproxy/v1/ordering/40500/iced. Accessed 2026-10-02. Source ↗
Recipes and labels change. If a number here no longer matches the label, the label wins.
General information, not medical advice
If you feel unwell after caffeine — for example chest pain, a fast or irregular heartbeat that does not settle, fainting, confusion or trouble breathing — get urgent medical help. If you are pregnant or breastfeeding, under 18, take medication, or have a heart, liver or anxiety condition, high blood pressure or a sleep disorder, ask a doctor or pharmacist what amount is right for you.
Sources
- U.S. Food and Drug Administration (2024). Spilling the Beans: How Much Caffeine is Too Much? FDA Consumer Updates. fda.gov ↗
- European Food Safety Authority. Caffeine | EFSA. EFSA topic page (summary of the 2015 Scientific Opinion on the safety of caffeine). efsa.europa.eu ↗
- NHS. Foods to avoid in pregnancy. NHS. nhs.uk ↗
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