pH Optimum Retinol Collection



What it Does

Lessens the appearance of wrinkles, improves texture, firms skin, and shrinks pores

Formulated For

Extremely damaged skin that’s exhibits deep and noticeable creases around lips, crow’s feet, 11-lines between brow, forehead wrinkles, and nasolabial folds or visibly enlarged pores. Stubborn face, back, chest breakouts.


Consistent nightly use of my pH-Optimum Retinol Complex intercepts aging signs and minimizes the appearance of lines and creases, helps shrink pores and improve skin texture and tone.  Retinol plumping, smoothing, and firming without redness, roughness, flakiness and irritation

Congratulations for leveling up to Level 4 of 8000 IUs of Retinol! You can always go back and forth with lower Levels if this concentration becomes too drying in winter or high altitude conditions. While other products give you percent of Retinol, 8000 IUs is the scientific concentration SAFELY administered for the most effective results. PREGNANCY SAFE, even planning pregnancy safe!

-Dr. Koo

My Prescription For You

Apply PM ONLY after Daily Anti-Toxin Cleanse. Follow with your Anti-Oxidant Vitamin Serum and Essential Hydration to complete your support team.

Always apply sunscreen of SPF of 15 or higher daily to prevent sun sensitivity.

The Breakthrough

  • My Level 4 Proprietary Retinol Treatment Blend actively helps skin recover and improve dermal matrix, Elastin, Collagen, GAGs content 
  • Accelerates your skin’s cell renewal processes to improve its health function
  • Slows down the on-going damage while mitigating the cellular distress
  • Features a cutting-edge infusion of B3, Vitamins A, D, F and proven anti-irritation, anti-oxidant modulators to enhance skin firmness, elasticity and texture
Full Ingredient List:

Purified Water, Niacinamide, Squalane, Glycerin, Glyceryl Stearate, PEG-100 Stearate, Caprylic/Capric Triglyceride, Cetyl Alcohol, Sclerocarya Birrea Seed Oil, Cocos Nucifera (Coconut) Oil, Hexylresorcinol, Retinol, Ceramide NP, Sodium Hyaluronate, Phytosterols, Aloe Barbadensis Leaf Extract, Bisabolol, Dimethicone, Tocopheryl Acetate, Persea Gratissima (Avocado) Oil, Ethyl Linoleate, Mica, Olea Europaea (Olive) Fruit Oil, Zingiber Officinale (Ginger) Root Extract, Cetearyl Alcohol, Disodium EDTA, Phenoxyethanol, Sodium Polyacrylate, Polysorbate 20, Ethylhexylglycerin, and Stearic Acid 


In my Private Practice Skincare, I have designed step-wise concentrations and ingredient differentiation that are your stepladder to success. The right products in the right concentrations at the right time in the right sequence. As your skin progresses and you see the improvement you desire, stay at your Level. If you need more improvement, move up to the next level. Save the higher levels when you need more change, always keep a little secret stash for future needs. If you need it though, level up!

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