Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
📊 Nutrition at a Glance
📏 High Animal Protein
Mackerel contains animal protein (about 24g per 100g). The AUA recommends limiting non-dairy animal protein to 3 oz (palm-sized) per meal. Reference guide, not an official standard.
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 4 oz | 113 g | 1 mg | Safe |
| 2 x 4 oz | 226 g | 2 mg | Safe |
| ½ x 4 oz | 56 g | 0.5 mg | Safe |
🏷️ Tags
🟢 See all Seafood rated Safe for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
❓ Frequently Asked Questions
Can I eat Mackerel with kidney stones?
Don't overthink this one. Mackerel has 1 mg oxalate per 4 oz. That's solidly safe territory for kidney stones. The number is from Harvard's latest lab work.
What's the oxalate content of Mackerel?
The exact figure: 1 mg of oxalate per 4 oz of Mackerel. Works out to 1 mg/100g. This is the number kidney stone patients actually need. Harvard (2024) verified.
Is Mackerel low or high oxalate?
Low. 1 mg per 4 oz puts Mackerel firmly in the low-oxalate category. Safe for regular eating if you're managing kidney stones.
What are the best low-oxalate alternatives to Mackerel?
Substitutes exist. The safe alternatives listed below are all low-oxalate foods in the same family as Mackerel. Grab one of those and you dodge the oxalate while keeping similar flavors.
Does Mackerel have a lot of animal protein?
It has animal protein, which increases kidney stone risk through uric acid and calcium in urine. Not a reason to eliminate it — just a reason to watch portions. AUA says about 3 oz per meal.
How much sodium does Mackerel have?
Sodium's not the issue here. Mackerel has 49 mg per 100g — comfortably low. No need to worry about salt pushing extra calcium into your urine with this food.