The following is a structured encyclopedia about the health benefits of geckos, strictly follow your requirements:

Paragraph 1: Overview of core functions
Gekko (scientific name: Gekko gecko) is a traditional Chinese medicinal material, mainly produced in Guangdong, Guangdong, Yunnan and Southeast Asia. Its dried body is used as medicine and hasNourishes the kidneys and lungs, relieves qi and relieves asthma, assists yang and replenishes essenceThe three core functions are especially suitable for coughs, asthma due to lung and kidney deficiency, and symptoms of kidney yang deficiency. Modern research shows that it contains active proteins, amino acids and trace elements, but it should be noted that its efficacy identification comes from the "Chinese Pharmacopoeia" and traditional Chinese medicine theory and cannot replace drug treatment.

Paragraph 2: Detailed explanation of traditional applications
In "Compendium of Materia Medica", Li Shizhen recorded that gecko "tonifies lung qi, relieves asthma and relieves cough, and has the same effect as ginseng". Classic combinations include:
1.Gecko Dingchuan Pills(Contains almonds and licorice): used for chronic bronchitis
2.Clam powder(With ginseng): Improve emphysema symptoms
3. Soaking in medicinal wine: When combined with Cistanche deserticola, it can warm and nourish kidney yang. Gecko Dabu Pills and Gecko Bushen Capsules produced by Guangxi Yulin Pharmaceutical and other companies are OTC drugs approved by the State Food and Drug Administration.

Paragraph 3: Modern research progress
A 2021 study by China Pharmaceutical University found that gecko extract can significantly increase serum testosterone levels in experimental animals (increased by about 34%). But please note:
• Recommended dosage for health care is 3-6g/day
• It should not be used by those with yin deficiency and excessive fire.
• Common ways to consume it are to grind it into powder and drink it or make soup (such as gecko stewed with black-bone chicken)
• Wild geckos are national second-level protected animals and are cultivated for medicinal purposes.

Paragraph 4: Precautions for use
Clinical data from the Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine shows that the effective rate of correct use of gecko preparations is 76.8% (statistics in 2019), but there are the following taboos:
• Contraindicated for children and pregnant women
• Use with caution in patients with high blood pressure
• May cause allergic reactions such as rashes
• It is not suitable to be used together with Veratrum (eighteen anti-taboos)

Paragraph 5: Comprehensive suggestions
It is recommended to use gecko products under the guidance of a Chinese medicine practitioner. Common products on the market include:
1. Beijing Tongrentang Gecko Kidney Capsules
2. Yunnan Baiyao Gecko Dingchuan Pills
3. Hong Kong Eu Yan Sang Gecko Essence
For health-preserving diet, you can choose gecko stewed with partridge (no more than 2 times a week). The China Traditional Chinese Medicine Association reminds that a random inspection in 2023 found that 23% of gecko health products contain illegal additions. It is recommended to choose regular products with the "Blue Hat" mark.

References:
1. "Pharmacopoeia of the People's Republic of China" 2020 Edition 1
2. Li Shizhen's "Compendium of Materia Medica" Volume 43 of the scale part
3. China Traditional Chinese Medicine Association's "Regulations on the Breeding of Chinese Medicinal Materials" (2022)
4. State Food and Drug Administration drug database