Low zinc

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026

Low zinc shows up as frequent infections, slow wound healing, a poor sense of taste or smell, and skin or hair problems, and is more common in vegetarians and older adults.

Zinc is essential for immune-cell function, tissue repair, taste, and testosterone, so a shortfall touches many systems. It is harder to absorb from plant-heavy diets high in phytates, which is why vegetarians are at higher risk.

Common causes

  • Vegetarian or vegan diet
  • Older age
  • Gut conditions affecting absorption
  • High alcohol intake
  • Heavy sweating in athletes

Associated symptoms

  • Frequent infections
  • Slow wound healing
  • Reduced taste or smell
  • Hair thinning
  • Acne or skin issues

Nutrients that can help

Zinc Picolinate
See the guide →
What to do

Take zinc (around 15 to 30 mg) with food to avoid nausea, and not at the same time as iron. Do not exceed about 40 mg a day long-term, since too much zinc lowers copper.

When to see a doctor

Persistent infections or healing problems should be assessed by a doctor rather than assumed to be zinc.

Full marker
Zinc: ranges, what it measures & both directions
Read the Zinc guide →

Common questions

What does low zinc mean?
Low zinc shows up as frequent infections, slow wound healing, a poor sense of taste or smell, and skin or hair problems, and is more common in vegetarians and older adults. Zinc is essential for immune-cell function, tissue repair, taste, and testosterone, so a shortfall touches many systems. It is harder to absorb from plant-heavy diets high in phytates, which is why vegetarians are at higher risk.
What causes low zinc?
Vegetarian or vegan diet; Older age; Gut conditions affecting absorption; High alcohol intake; Heavy sweating in athletes.
How do I raise my zinc?
Take zinc (around 15 to 30 mg) with food to avoid nausea, and not at the same time as iron. Do not exceed about 40 mg a day long-term, since too much zinc lowers copper.
When should I see a doctor?
Persistent infections or healing problems should be assessed by a doctor rather than assumed to be zinc.

Have your full results?

Upload your bloodwork and we'll read every marker, flag what's off, and match evidence-led, targeted support.

Analyse my bloodwork →

Educational use only, not medical advice or diagnosis. Reference ranges vary by lab, age, sex, and medication, and a single result is read in context. Always review your results with a qualified clinician.