Calories in Starbucks Youthberry (1 Bag) come to just 5, matching the numbers of the brewed Tea (Youthberry) since this is the exact same bag before steeping.
That single tea bag carries only 0.9g of sugar and zero fat, giving it a naturally fruity, sweet flavor without any actual sugar added.
This is useful to know if you want to see exactly what the plain herbal tea bag contributes before any milk or sweetener comes into play.
Youthberry® (1 bag) Nutrition Facts
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Youthberry® (1 bag)
–/100Calories
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Long-Term Health Impact
After 1 Week
Drinking a daily Grande Youthberry® (1 bag) adds 35 calories to your week — about 7 minutes of brisk walking to offset.
After 1 Month
Over a month, that's 150 calories — roughly 0.0 lb of potential weight gain if it isn't offset by activity.
After 1 Year
Over a year, a daily Grande Youthberry® (1 bag) totals 1825 calories and 0.3kg of sugar — equivalent to about 18 miles of jogging to burn off.

