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    Glossary Placebo Effect

    The placebo effect refers to the phenomenon where individuals experience a perceived improvement in their condition after receiving a treatment that has no therapeutic effect, often due to their expectations or beliefs about the treatment. In the context of hair loss, the placebo effect can significantly influence the outcomes of clinical trials for hair restoration therapies, as participants may report hair regrowth or reduced shedding simply because they believe the treatment is effective. Key distinguishing characteristics include the psychological component of belief and expectation, which can lead to real physiological changes, even in the absence of active ingredients.

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      learn Setipiprant

      • What side effects or limitations have been reported with Setipiprant use in hair loss research? In the one published hair-loss trial (DuBois 2021, 169 men, 24 weeks), setipiprant produced no significant hair regrowth over placebo. Treatment-related side effects — mostly mild headaches, stomach upset and fatigue — were reported in about a quarter of the setipiprant group versus just over twelve percent on placebo, and no serious events were attributed to the drug. It is an unapproved, experimental compound with no long-term safety data.

      learn Dutasteride

      • Dutasteride side effects: what the label and studies actually report The Avodart label reports impotence in 4.7% and decreased libido in 3.0% of men in the first six months (1.7% and 1.4% on placebo), with new reports falling after month six; those figures come from BPH trials in older men, and the hair-loss trials in younger men run only six months. The label and studies also flag a PSA drop of about half, a small rise in high-grade prostate cancer in one trial, an observational link to depression, and sexual effects that the label says may persist after stopping.

      learn Finasteride

      • What does finasteride do to the female body? Find out its side effects. Finasteride is not approved for hair loss in women anywhere; the one controlled trial, in 137 postmenopausal women at 1 mg daily, found no benefit over placebo, while smaller uncontrolled studies at higher off-label doses report some improvement. It is contraindicated in pregnancy and crushed or broken tablets must not be handled.

      learn Melatonin

      • Melatonin: Does it work the same for men and women? No trial has compared melatonin's effect on hair in men versus women. The only placebo-controlled scalp study enrolled 40 women, and the single reported sex difference — shedding fell in women but not men — comes from one uncontrolled 60-person observation, so any difference is unestablished.

      learn Procyanidin

      bioflavonoid found in plants with antioxidant and hair stimulating properties

      learn Follistatin

      glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

      learn Osteopontin

      signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss
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