These four powerhouses are where I start with everyone in clinic. Why? Because they’re the ingredients with the most research behind them; we know how they work, what they do, and what results to expect. And more importantly, they work with your skin to help it behave like it did in its prime (think: 25 years old and thriving).

This is where we sweep away the old to reveal the new. Exfoliating acids (like glycolic, lactic, or salicylic acid) help dissolve dead skin cells, clear congestion, and improve skin texture. Usually used in the evening, although some may slot into a morning routine depending on the product and patient.

From the age of 25, we begin losing collagen at a rate of 1% per year. Our cell turnover slows, skin becomes dull, flaky, and fine lines start creeping in. Retinoids are your secret weapon—they increase cell turnover, stimulate collagen, and keep your skin behaving like it’s 25 again. There are many types, and we tailor our recommendations to each patient’s skin type, concern, and lifestyle.

Instead of thinking “I must have a toner, serum, and a moisturizer,” I want you to think about the function your products serve. What is in your routine to protect? What is in your routine to correct?

For some, that may mean layering actives in serum form for maximum potency. For others, especially if you’re newer to skincare or prefer a streamlined approach, it might be better to keep things simple by choosing combination products or actives in cream form. Either way, the Core Four should be your anchor.