Zinc

Zinc is an essential mineral. MedlinePlus states that the body’s immune system needs zinc to work properly, and that zinc also supports cell division, growth, wound healing and the breakdown of carbohydrates. It is required for the senses of smell and taste, and the body needs it during pregnancy, infancy and childhood to grow and develop properly.

What are the benefits of a zinc supplement?

The honest framing is that zinc has established functions in the body, which is a different claim from a supplement producing a benefit in someone who already gets enough.

MedlinePlus describes zinc’s roles — immune function, cell division, growth, wound healing, carbohydrate metabolism, smell and taste — and points readers to a balanced diet as the way to meet daily requirements for essential vitamins and minerals. It also notes that low-protein and vegetarian diets tend to be low in zinc, and that zinc in plant foods is less available to the body than zinc from animal proteins, which is where a supplement question realistically arises.

Signs of deficiency listed on the page include frequent infections, hair loss, poor appetite, problems with taste and smell, skin sores, slow growth, night blindness and slow wound healing.

How much zinc should I take?

MedlinePlus gives recommended dietary allowances rather than supplement doses:

• Infants 0–6 months: 2 mg a day
• Males 14 and over: 11 mg a day
• Females 14–18: 9 mg a day
• Females 19 and over: 8 mg a day
• Pregnancy, 19 and over: 11 mg a day
• Lactation, 19 and over: 12 mg a day

These are total daily intakes from all sources, food included — not amounts to add on top of a diet.

What is the best time to take a zinc supplement?

This source does not address it.

That is the accurate answer rather than a gap to fill. MedlinePlus covers zinc’s function, food sources, recommended intakes, deficiency and excess, and says nothing about time of day. Advice circulating on this question does not come from this page, and this entry will not manufacture it.

What are the side effects of too much zinc?

MedlinePlus states that large amounts may cause diarrhoea, abdominal cramps and vomiting, generally within 3 to 10 hours of swallowing the dose, and that symptoms subside within a short period after the dose is discontinued.

Two longer-range points matter more for anyone taking zinc daily. Long-term excess intake of zinc can lead to copper, iron or magnesium deficiency — which is the reason many zinc products pair zinc with copper. And MedlinePlus notes that nasal sprays containing zinc may cause a loss of the sense of smell.