Spinach
Last updated: February 10, 2026
Table of Contents
Quick Summary
Spinach Leafy green rich in iron, vitamins, and antioxidants.
What It Is
Spinach (Spinacia oleracea) is a nutrient-dense leafy green vegetable providing vitamins, minerals, and antioxidants in dog food. Fresh spinach contains approximately 91% moisture, 4g carbohydrate, 3g protein, 0.4g fat, and 2g fiber per 100g. Spinach is exceptionally rich in vitamins (A, C, K1, folate, B vitamins), minerals (iron, calcium, magnesium, manganese), and beneficial plant compounds including lutein and zeaxanthin (eye health). However, spinach is high in oxalates—compounds that bind calcium and can contribute to kidney stone formation in predisposed dogs. In moderation (small amounts in dog food), spinach is beneficial. Large amounts are concerning. Cooked spinach has lower oxalate bioavailability than raw.
Compare to Similar Ingredients
- vs. kale: Both are nutrient-dense leafy greens. Kale and spinach provide similar vitamins and minerals. Spinach has slightly more iron; kale has slightly more vitamin C. Both contain oxalates, though spinach is higher. Both are nutritious in moderation.
Why It's Used in Dog Products
Spinach appears in dog food for exceptional micronutrient density—vitamins A, C, K, folate, iron, calcium. It provides antioxidants and signals premium whole-food ingredients. Marketing appeal—'with spinach' suggests health-conscious formulation. In small amounts typically used in dog food, spinach provides genuine nutritional benefits. Amounts are kept moderate due to oxalate concerns.
Nutritional Profile
Quality Considerations
When evaluating spinach in dog products, it's important to understand antioxidant content, phytonutrients, and whole food nutrition. This ingredient's quality and appropriateness can vary significantly based on sourcing, processing, and the specific formula it's used in.
Very nutrient-dense. Use in moderation due to oxalate content.
Potential Concerns
Spinach's main concern is high oxalate content. Oxalates bind calcium and can contribute to calcium oxalate kidney stones in predisposed dogs. In small amounts used in dog food, this is minimal concern. Large amounts (feeding plain spinach as significant meal portion) could be problematic. Dogs with kidney stone history should have oxalate-containing foods monitored. Otherwise, spinach in dog food amounts is safe and beneficial.
Contraindications
- Dogs with calcium oxalate kidney stone history should have oxalates monitored
- Very large amounts of spinach should be avoided
Excellent nutrient source in appropriate amounts.
Frequently Asked Questions
Is spinach safe for dogs?
Yes, spinach is safe for dogs in moderation, like the small amounts used in dog food. Spinach is nutrient-dense with exceptional vitamins (A, C, K, folate), minerals (iron, calcium, magnesium), and antioxidants. However, spinach is high in oxalates—compounds that can contribute to kidney stones in predisposed dogs if consumed in large amounts. The small amounts in commercial dog food are safe and beneficial. Avoid feeding large amounts of plain spinach as meal replacement. For dogs with kidney stone history, monitor oxalate intake. In dog food formulas, spinach provides genuine nutritional value without significant risk.
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