Is Bran Flakes Cereal Safe for Kidney Stones? (Caution)
mg oxalate
per serving
Serving: 1 serving (100 g)
Verdict: 🟡 Caution
Per 100g: 141 mg
Data: Harvard T.H. Chan SPH (2024)
In practical terms, Bran Flakes Cereal sits in the 25-99 mg range with 51 mg per serving, so treat it as a sometimes-food. Keep servings modest, don't stack it with other moderate-oxalate items in one day, and pair it with calcium to blunt absorption.
Among grains & pasta, Bran Flakes Cereal sits well above the category average of 14 mg. For context, 170 out of 201 grains & pasta (84%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average grains & pasta in our database has 14 mg oxalate per serving — which means Bran Flakes Cereal is 267% above the category norm. Within its specific category, Bran Flakes Cereal ranks on the higher end for oxalate. This context matters because two 'Safe' foods can have very different oxalate levels — one might have 5 mg while another has 24 mg. Both are Safe, but the first gives you more dietary flexibility. Browse all grains & pasta rated Caution to compare within the same verdict level.
Why does the safe threshold matter?
The 25 mg line is the reference point clinicians use to separate everyday foods from ones that need caution. Every value on this page traces back to Harvard's 2024 lab analysis, so the threshold is applied to measured data rather than estimates. For Bran Flakes Cereal, the measured oxalate value is 51 mg per 1 serving (Caution).
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 Bran Flakes Cereal, the measured oxalate value is 51 mg per 1 serving (Caution).
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. Applied to Bran Flakes Cereal: 51 mg oxalate per 1 serving — Caution per Harvard (2024).
Should I also check sodium and calcium?
Definitely. Oxalate is only part of the story — high sodium raises calcium in urine, and dietary calcium (from food, not pills) binds oxalate in the gut. The food's main page lists both, so it's worth checking before you plan around it. Bran Flakes Cereal comes in at 51 mg oxalate per 1 serving (Caution) in the measured database.