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Organic Spinach Extract (Spinacia oleracea Leaf)
Also known as: Spinach Leaf Extract, Spinacia oleracea Extract, Spinach Powder, Spinach Leaf Powder
Spinach extract is a concentrated source of naturally occurring nutrients including vitamins (K, A, C, folate), minerals (iron, magnesium), and phytonutrients like lutein and oxalates. Limited clinical evidence supports its use as a whole-food concentrate, though individual components have been studied.
Primary uses
- Nutritional supplementation
- Antioxidant support
- General wellness
How it works
- Provides bioavailable phytonutrients (lutein, zeaxanthin, kaempferol)
- Contributes vitamin K for bone and cardiovascular health
- Supplies minerals and cofactors for metabolic function
Dosage
- Typical range
- 1-3 grams (1,000-3,000 mg) daily
- Timing
- Any time of day
- With food
- With food to enhance nutrient absorption and minimize GI upset
- Duration
- Safe for long-term use as part of daily nutrition
- Special populations
- Individuals on warfarin or anticoagulants should maintain consistent vitamin K intake; those with kidney disease should monitor oxalate content
Forms
- Powder· 70/100
- Extract concentrate· 70/100
Safety
Common side effects
- Minimal at typical doses
- Possible mild GI upset if taken on empty stomach
- Kidney stone risk if predisposed (high oxalate content)
Contraindications
- Caution with anticoagulant medications due to vitamin K content
- History of kidney stones or hyperoxaluria
- Thyroid disease (goitrogens in raw spinach, likely reduced in extract)
Evidence notes
While spinach components (vitamin K, lutein, nitrates) have established benefits in isolated studies, evidence for spinach extract as a standalone supplement formulation is limited. Most research supports whole spinach consumption rather than concentrated extracts.
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
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