Is Star Fruit Juice (Star Fruit) Safe for Kidney Stones? (Avoid)
mg oxalate
per serving
Serving: 1 cup (240 g)
Verdict: 🔴 Avoid
Per 100g: 829 mg
Data: Harvard T.H. Chan SPH (2024)
Here's the takeaway: Star Fruit Juice (Star Fruit) is a Avoid food (🔴) at 1990 mg oxalate per serving — past the 100 mg line. The safest approach is choosing a lower-oxalate alternative instead. If it shows up occasionally in a meal, keep the portion minimal and boost fluids.
Putting Star Fruit Juice (Star Fruit) in context: it lands well above the category average of 40 mg. In the database, 89% of beverages (82 of 92) fall in the 🟢 Safe group (under 25 mg oxalate/serving). The typical beverages here averages 40 mg oxalate per serving, so Star Fruit Juice (Star Fruit) runs 4921% above that baseline. That places it on the higher end for oxalate in its category. Why this matters: the gap between two Safe foods can be wide — one may hold 5 mg oxalate while another sits at 24 mg. The lower one leaves more room in your day. See all beverages rated Avoid for a full side-by-side.
Why does the safe threshold matter?
The 25 mg per serving threshold is based on clinical guidance for kidney stone patients. Harvard's lab data (2024) provides the most reliable oxalate measurements available — no database estimates, direct lab analysis. Star Fruit Juice (Star Fruit) comes in at 1990 mg oxalate per 1 cup (Avoid) in the measured database.
Can I eat this food every day?
If it's in the Safe zone (under 25 mg/serving), yes — it can be a regular part of your diet. For Caution or Avoid foods, frequency matters. Rotate them with lower-oxalate options throughout the week. For context, Star Fruit Juice (Star Fruit) measures 1990 mg per 1 cup, rated Avoid.
Where does the oxalate data come from?
The numbers come from Harvard T.H. Chan SPH's 2024 laboratory measurements, published through the OHF database. Direct lab analysis, which is why they're treated as the reference values for food oxalate. For context, Star Fruit Juice (Star Fruit) measures 1990 mg per 1 cup, rated Avoid.
Should I also check sodium and calcium?
Yes — oxalate alone doesn't decide stone risk. Sodium pushes more calcium into urine, and calcium from food (not supplements) helps bind oxalate during digestion. The main food page covers sodium and calcium alongside oxalate. Star Fruit Juice (Star Fruit) comes in at 1990 mg oxalate per 1 cup (Avoid) in the measured database.