Castor Oil for Hair: Benefits, Myths, and Best Uses
Castor oil has a reputation as the “thick, hardworking” hair oil—something you reach for when ends feel brittle, the scalp feels tight, or growth...
Celiac Disease and Hair Loss: Nutrient Malabsorption Signs and Testing Basics
Hair is often where the body “shows its work.” When nutrients are not absorbed well, or when inflammation quietly simmers for months, the hair...
Central Centrifugal Cicatricial Alopecia (CCCA): Early Signs, Risk Factors, and Treatments
Central centrifugal cicatricial alopecia (CCCA) is a type of scarring hair loss that often starts quietly—subtle thinning at the crown, extra breakage near the...
Ceramides for Scalp Barrier: Dryness, Sensitivity, and Best Product Types
When a scalp feels persistently dry, tight, or “reactive,” the problem is often less about what you can see and more about what your...
Chemical Burns From Hair Products: Symptoms and What to Do Immediately
A “burning scalp” after a new hair product can mean several different things—from mild irritation that settles overnight to a true chemical burn that...
Chronic Telogen Effluvium: When Shedding Lasts Longer Than 6 Months
Not all hair shedding is a short-lived episode. Chronic telogen effluvium (CTE) is the term used when diffuse shedding continues beyond six months—often in...
Clarifying Shampoo: When to Use It and How Often
A clarifying shampoo is a reset button for hair that feels “off”: heavy at the roots, dull through the lengths, or strangely resistant to...
Coal Tar Shampoo: What It Treats, Smell Concerns, and Modern Alternatives
Coal tar shampoo is one of the oldest medicated scalp treatments still in everyday use—and for the right person, it remains surprisingly effective. It...
Coily Hair and Scalp Dryness: Causes, Oils, and Wash Frequency Guide
Coily hair can look glossy and feel touchably soft, yet still come with a familiar frustration: a scalp that feels tight or itchy, lengths...
Collagen for Hair: What Evidence Suggests and How Much to Take
Collagen has become one of the most talked-about supplements for hair—often marketed as a shortcut to thicker strands, faster growth, and less breakage. The...
Collagen Peptides for Hair: Benefits, Best Types, and How Long to Try It
Collagen peptides have become a go-to “beauty-from-within” supplement for people who want stronger hair, better shine, and fewer breakage surprises—especially when styling or weather...
Contact Dermatitis on the Scalp: Hair Dye Allergy and Product Reactions
A reactive scalp can turn everyday routines—washing, conditioning, coloring—into a cycle of burning, itching, and flakes that never quite settle. Contact dermatitis is one...
Copper for Hair Growth: Best Foods, Lab Testing, and Safe Supplementing
Copper is a trace mineral, but it plays an outsized role in the “invisible” processes that keep hair growing well: iron handling and oxygen...
Copper Peptides for Hair Growth: GHK-Cu, Serums, and What to Expect
Copper peptides sit in an interesting middle ground between skincare science and hair-care hope. The best-known form, GHK-Cu (a copper-bound tripeptide), is studied for...
Cradle Cap in Babies: Causes, Treatment, and When to See a Doctor
Cradle cap can look dramatic—thick yellow scales, crusty patches, and a scalp that seems suddenly “different”—yet in most babies it is harmless and temporary....
Creatine and Hair Loss: Newer Evidence, DHT Myths, and What to Do
Creatine is one of the most studied performance supplements, and it has a well-earned reputation for helping with strength, power, and training volume. Yet...