does taking more zinc help?

Zinc is an essential nutrient required by humans and animals alike. It plays a variety of biological roles in the body including catalytic, structural, and regulatory roles. It is required to heal injuries, to maintain fertility in adults and growth in children, synthesize protein, maintain health vision, support immune function, and protect the body against the oxidative effects of free radicals.

While zinc deficiencies are not as common in developed countries, in third world countries zinc deficiencies are quite common. However, even in developed countries, low-income pregnant women are at risk of mild zinc deficiencies. People with liver cirrhosis, malabsorption syndromes, and Down's syndrome may also be prone to zinc deficiencies.

Zinc is also believed to play an important role when used in connection with the following conditions:

Acne
Acrodermatitis enteropathica
Childhood intelligence (for deficiency)
Common cold (using lozenges with 15 to 25 mg of zinc glucanate, glycine or acetate)
Contact dermatitis (using zinc sulfate)
Down's syndrome
Infertility (male) (for deficiency)
Improve studented growth in children (usually in developing countries)
Night blindness (for deficiency)
Wilson's disease (by interfering with body's ability to use essential mineral copper)
Wound healing (oral and topical)

No, Zinc is mainly for treating Colds, Cold Sores, Macular Degeneration, Attention Deficit/Hyperactivity Disorder, Acne, Sickle-cell Disease, etc.

I would suggest you try Cordyceps.