Is Flour Flaxseed meal or ground Flaxseed Safe for Kidney Stones?
mg oxalate
per serving
Serving: 1/4 cup (26 g)
Verdict: 🟢 Safe
Per 100g: 8 mg
Data: Harvard T.H. Chan SPH (2024)
What this means: Flour Flaxseed meal or ground Flaxseed is rated Safe (🟢). At 2 mg oxalate per serving, it's well under the 25 mg safety threshold. You can include it regularly in a kidney stone diet. Pair it with calcium-rich foods (dairy, fortified plant milks) for additional protection, and drink plenty of water throughout the day.
Among nuts & seeds, Flour Flaxseed meal or ground Flaxseed sits well below the category average of 34 mg. For context, 29 out of 51 nuts & seeds (56%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average nuts & seeds in our database has 34 mg oxalate per serving — which means Flour Flaxseed meal or ground Flaxseed is 95% below the category norm. Within its specific category, Flour Flaxseed meal or ground Flaxseed ranks among the lower-oxalate options. 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 nuts & seeds rated Safe to compare within the same verdict level.
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. Flour Flaxseed meal or ground Flaxseed comes in at 2 mg oxalate per 1/4 cup (Safe) 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, Flour Flaxseed meal or ground Flaxseed measures 2 mg per 1/4 cup, rated Safe.
Where does the oxalate data come from?
Harvard T.H. Chan School of Public Health (2024) via the OHF database. These are direct laboratory measurements — the most reliable oxalate data available for food. Flour Flaxseed meal or ground Flaxseed comes in at 2 mg oxalate per 1/4 cup (Safe) in the measured database.
Should I also check sodium and calcium?
Yes — kidney stone risk isn't just about oxalate. High sodium increases urinary calcium (a stone promoter). Adequate dietary calcium (from food, not supplements) actually binds oxalate in your gut. Check the food's full nutrition page for the complete picture. Applied to Flour Flaxseed meal or ground Flaxseed: 2 mg oxalate per 1/4 cup — Safe per Harvard (2024).