top of page


  • Alexander Olaussen

Understanding Zinc: Signs of Deficiency, Dosage, and Risks of Excess

Zinc, a vital trace mineral, plays a crucial role in numerous bodily functions.

It's essential for many things, such as:

  • immune function

  • wound healing

  • DNA synthesis

  • cell division.

Despite its importance, zinc deficiency is a common issue worldwide. This blog post delves into the signs and symptoms of zinc deficiency, recommended dosages for supplementation, and the potential risks of excessive zinc intake.

Signs and Symptoms of Zinc Deficiency

Zinc deficiency can manifest in various ways. Some common symptoms include:

  • Weakened Immune System: Frequent infections or slow wound healing.

  • Skin Changes: Rashes or slow wound healing.

  • Hair Loss: Unusual hair loss which is not explained by other causes.

  • Appetite Loss and Weight Loss: Decreased hunger and unintended weight loss.

  • Taste and Smell Alterations: Diminished ability to taste and smell.

  • Mood Disturbances: Increased irritability and mood swings.

Recommended Zinc Dosage

The recommended dietary allowance (RDA) for zinc varies based on age, sex, and life stage:

  • Adult Men: 11 mg/day

  • Adult Women: 8 mg/day

  • Pregnant Women: 11-12 mg/day

  • Breastfeeding Women: 12-13 mg/day


In cases of deficiency, supplementation may be necessary. It's crucial to consult a healthcare provider before starting any supplement regimen. Typically, doses of 15-30 mg/day are used to correct deficiencies.

Zinc and Different diseases

Risks of Excessive Zinc Intake

While zinc is essential, too much can be harmful. Excessive zinc intake can lead to:

  • Copper Deficiency: High levels of zinc can interfere with copper absorption.

  • Neurological Symptoms: Over-supplementation might lead to neurological issues.

  • Digestive Problems: Nausea, vomiting, and stomach pain can occur.

  • Immune System Impairment: Paradoxically, too much zinc can weaken the immune system.

Upper Limits

The tolerable upper intake level (UL) for zinc is:

  • Adults: 40 mg/day

  • Pregnant/Breastfeeding Women: 35-40 mg/day


Zinc is a crucial nutrient, and its deficiency can lead to multiple health issues. While supplementation can be beneficial in deficiency cases, it's vital to adhere to recommended dosages and be aware of the risks associated with excessive intake. Always consult a healthcare professional before starting any new supplement regimen.

1 view0 comments

Recent Posts

See All

Tirzepatide: GLP-1 Agonist

Background: Tirzepatide is a relatively new medication that has been making waves in the world of diabetes management and metabolic health. Tirzepatide is a once-weekly injectable medication developed

RCTs on Intermittent Fasting

Background: There is a lot of evidence supporting IF Below is a collection of all RCTs on IF Evidence: Updated 11th October 2023 RSS feed Efficacy and Safety of Intermittent Fasting in People With Ins


bottom of page