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Quantity: 120 veg capsulesNow Arginine & Citrulline contain 500 mg of L-Arginine free form and 250 mg of L-Citrulline free form per capsule.
Quantity: 100 CapsulesNow Arginine & Ornithine contains 500 mg arginine and 250 mg ornithine per capsule.
Quantity: 120 TabletsNow L-Arginine 1000 mg has twice the L-Arginine as the Now regular strength product (500 mg per capsule).
Quantity: 100 capsulesNow L-Arginine is a premium grade, conditionally essential amino acid.