By Karim Hammam
Social media is flooded with viral hair care trends promising thicker, longer, and healthier hair, but trichologist Anabel Kingsley warns that many popular hacks lack scientific support and may actually damage the scalp and hair.
Rosemary oil lacks strong evidence for hair growth
The rosemary oil trend is largely based on a single small 2015 study involving 50 men, with no women included. Kingsley notes that the study compared rosemary oil to 2% minoxidil, a concentration not considered standard for treating male pattern hair loss. While rosemary oil itself may not be harmful, relying on it for progressive thinning could delay effective intervention.
You cannot train your scalp to produce less oil
The idea that washing hair less frequently reduces oil production is a myth. Kingsley explains that sebum is produced by scalp glands and cannot be "trained" to stop. Infrequent washing can lead to breakouts and inflammation. She recommends washing as often as the scalp needs, using fingertips to massage the scalp for about 60 seconds.
Tight hairstyles and heatless curls risk traction alopecia
Slicked-back buns and heatless curling methods can place excessive tension on hair roots, potentially causing traction alopecia — gradual hair loss from chronic strain. Kingsley advises avoiding tight, uncomfortable styles worn for long periods daily.
Sulphate-free shampoos are not inherently better
Sulphates are cleansing agents that remove oil and dirt. Kingsley says they are completely fine and that sulphate-free formulas can be just as harsh. The key is how a product works for an individual's scalp and hair, not the presence or absence of sulphates.
Collagen shampoos do not thicken hair growth
Hair is not made of collagen and does not need more of it. Shampoo is a rinse-off product, so any collagen has minimal contact with the scalp. Proteins in conditioners may temporarily thicken the appearance of hair, but they do not change follicle growth.
Scalp massagers may damage the scalp
Silicone scalp brushes with rigid or pointed bristles can be abrasive and damage the scalp and hair. Kingsley calls them a waste of money and recommends using fingertips instead.
Effective treatments depend on the cause of hair loss
For female pattern hair loss, topical minoxidil remains one of the best-supported treatments. For telogen effluvium — excessive shedding triggered by illness, stress, nutritional deficiencies, medications, or childbirth — addressing the underlying cause is the priority.
