How much caffeine is in Starbucks Strawberry Açaí Refresher?
A Grande (16 fl oz) Starbucks Strawberry Açaí Refresher has 50 mg of caffeine.
That's about half a cup of brewed coffee, and 13% of the 400 mg a day the FDA cites for most healthy adults.
Source: starbucks.com · checked 10 Nov 2026
When did you have it?
Had at 3 pm, about 18 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.
Your whole day, every drink, in the free CaffeineIQ check. The iPhone app is coming soon.
Sizes
| Size | Volume | Caffeine | mg per fl oz |
|---|---|---|---|
| Tall | 12 fl oz (355 ml) | 25 mg | 2.1 |
| Grande shown above | 16 fl oz (473 ml) | 50 mg | 3.1 |
| Venti | 24 fl oz (710 ml) | 75 mg | 3.1 |
| Trenta | 30 fl oz (887 ml) | 100 mg | 3.3 |
Source: starbucks.com · checked 10 Nov 2026
Latest time to drink it
For an 11 pm bedtime, a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher stays under the 50 mg most people sleep fine with, even late in the evening. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.
| Bedtime | Very sensitive under 25 mg | Average under 50 mg | Not very sensitive under 100 mg |
|---|---|---|---|
| 9 pm | 3:30 pm | Any time | Any time |
| 10 pm | 4:30 pm | Any time | Any time |
| 11 pm | 5:30 pm | Any time | Any time |
| Midnight | 6:30 pm | Any time | Any time |
| 1 am | 7:30 pm | Any time | Any time |
For a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.
How long it lasts
The caffeine from a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher peaks in your blood about 75 minutes after you start it, at roughly 43 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.
| Time after | 3 hours | 6 hours | 9 hours | 12 hours |
|---|---|---|---|---|
| Still in you | 35 mg | 23 mg | 15 mg | 10 mg |
So one had at 3 pm leaves about 18 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Strawberry Açaí Refresher is stronger than 6% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (3.1 mg) it is stronger than 5% of them.
To reach 400 mg in a day you would need about 8 of these.
Less caffeine
- Starbucks London Fog Latte 40 mg, Grande
- Dutch Bros Chai 35 mg, Medium hot
- Starbucks Iced Chaider 30 mg, Grande
More caffeine
- Starbucks Caramel Brulée Chai 55 mg, Grande
- Starbucks Chai Latte 55 mg, Grande hot
- Starbucks Iced Cream Matcha 55 mg, Grande
Same caffeine: Starbucks Dragon Drink, Starbucks Mango Dragonfruit Refresher, Starbucks Pink Drink.
FAQ
Is Starbucks Strawberry Açaí Refresher high in caffeine?
It is moderate. A Grande (16 fl oz) Starbucks Strawberry Açaí Refresher has 50 mg, which is 53% of the 95 mg in an 8 fl oz cup of brewed coffee.
How much caffeine is in a Tall Starbucks Strawberry Açaí Refresher?
A Tall (12 fl oz) Starbucks Strawberry Açaí Refresher has 25 mg of caffeine, 25 mg less than a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher.
How much caffeine is in a Trenta Starbucks Strawberry Açaí Refresher?
A Trenta (30 fl oz) Starbucks Strawberry Açaí Refresher has 100 mg of caffeine, 50 mg more than a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher.
Can I drink Starbucks Strawberry Açaí Refresher at night?
For most people, yes: even late in the evening a Grande (16 fl oz) Starbucks Strawberry Açaí Refresher stays under 50 mg at an 11 pm bedtime.
How long does the caffeine in Starbucks Strawberry Açaí Refresher last?
It peaks about 75 minutes after you start it. Of the 50 mg, about 23 mg is still in you 6 hours later and 10 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Strawberry Açaí Refresher have more caffeine than Red Bull?
No. A Grande (16 fl oz) Starbucks Strawberry Açaí Refresher has 50 mg; an 8.4 fl oz can of Red Bull has 80 mg.
Method and limits
The caffeine figure comes from starbucks.com and the other sources listed above; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.
These are estimates for information, not medical advice.
Related
More from Starbucks
- Starbucks Vanilla Sweet Cream Cold Brew
- Starbucks Vanilla Sweet Cream Nitro Cold Brew
- Starbucks White Chocolate Mocha
- Starbucks Aerocano
- Starbucks Banana Bread Latte
- Starbucks Blonde Roast
More coffee-shop drinks
- Starbucks Toasted Coconut Latte
- Starbucks Vanilla Bean Crème Frappuccino
- Starbucks Vanilla Protein Cream Cold Brew
- Dunkin' Frozen Coffee
- Dunkin' Refresher
- Dutch Bros Americano
- All coffee-shop drinks