Hi gg,
Restylane usually comes in 1.1 to 1.2 cc quantities per syringe.
The concentration of actual hyaluronic acid varies from product to product. Restylane has 20 mg/ml hyaluronic acid. Perlane is the Restylane product with a higher concentration of HA.
Juvederm Ultra has 24 mg/ml, Juviderm Ultra Plus has 30 mg/ml.
Preville Silk has 4.5 to 6 mg/ml.
Dr. Mayer has answered the rest of your question very well.
Be well and happy Holidays.
Dr. P



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