Hair Support

Nutrients connected to Hair Support

A link means the body needs the nutrient for this, or that low intake is linked to it. It does not mean extra supplements help if your intake is already adequate; each link shows how strong the evidence is.

• Rosemary OilPreliminary or mixed

  One 6-month trial showed hair count rising with rosemary oil, similar to minoxidil 2%; a 2025 review calls the evidence limited.

• Vitamin B7Preliminary or mixed

  Hair loss is a sign of biotin deficiency, and biotin helped some people whose hair problems had an underlying cause. A 2017 review found insufficient evidence for healthy people.

• ZincDeficiency link

  Hair loss is listed as a sign of zinc deficiency. It has many other causes, and extra zinc has not been shown to help hair when zinc is normal.

• Lemongrass OilPreliminary or mixed

  Small trial of a lemongrass-oil scalp tonic for dandruff; not enough to say it supports hair health.

• Cedarwood OilPreliminary or mixed

  Only a four-oil blend was tested, in people with patchy hair loss.

• Kukui Nut OilPreliminary or mixed

  One small eyelash trial (15 women, company-linked) reported longer lashes; no scalp hair trial was read.

• Marine Collagen (Fish)Preliminary or mixed

  One 24-week trial of fish-skin peptides in women reported thicker hair shafts; it has not been repeated in the sources we read.

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