Skin and hair care judged on ingredients and concentration rather than packaging, covering what a formulation achieves and what needs a clinic instead.
Every color in a cosmetic product, from a mineral blush to a synthetic lipstick pigment, is regulated under a decades-old federal system. Here is how the approval process works and why it still bars a dye that is only now being phased out of food.
Ridging, white spots, and slow growth are usually benign, while some nail changes, including certain discolorations and sudden multiple-nail changes, merit medical evaluation.
Glycolic, lactic, and salicylic acids have trial support for texture, tone, and blemishes, with differences in depth, strength, and sun sensitivity that shape their use.
The stratum corneum works like bricks and mortar, and moisturizer classes, humectants, emollients, and occlusives, support it in measurably different ways.
Minoxidil and finasteride carry the strongest trial records for pattern hair loss, while supplements, laser devices, and PRP sit on thinner or emerging evidence.
Hyaluronic acid holds water in skin effectively as a humectant, and small trials suggest oral and topical forms may improve hydration measures, with limits worth knowing.