There are many popular home remedies for nail growth, including the use of toothpaste and onions. It’s essential to understand the scientific basis behind these ingredients, their potential effectiveness, and the necessary precautions before incorporating them into your nail care routine. Ingredient Analysis: Myth vs. Reality 1. Toothpaste: Composition and Proposal: Modern toothpaste contains various ingredients such as fluoride, abrasives (hydrated silica), humectants, surfactants, and, in some cases, triclosan. Popular belief suggests that fluoride could strengthen the nail plate similarly to tooth enamel. Evidence and Risks: There are no scientific studies that support its effectiveness for nail growth or strengthening. On the contrary, its components can be problematic: Abrasives: These can damage and wear down the nail surface, making it more porous and brittle. Fluoride in high concentrations: Can cause dryness and brittleness in the nail and surrounding skin (cuticles). Flavorings and other chemicals: Can irritate the sensitive skin around the nails. Conclusion: It is not a recommended ingredient for nail care due to its potential for harm and lack of proven benefits. 2. Onion (Allium cepa): Composition and Proposal: Onions are rich in sulfur (in the form of compounds such as thiosulfinates), selenium, and quercetin. Sulfur is a key component of keratin, the main structural protein of hair and nails. Selenium is an antioxidant that protects cells. Evidence and Mechanism: Although guiding clinical studies are lacking, its nutritional profile is promising. Topical application of onion juice could, in theory, provide sulfur and antioxidants that strengthen the nail matrix (the nail root where growth originates) and the nail bed. Caution: Direct application may irritate sensitive skin, and its odor is strong and persistent. Evidence-Based Recipes and Protocols Based on the analysis above, recipes are proposed that safely harness the potential of onions and combine them with other synergistic ingredients, excluding toothpaste. Recipe 1: Intensive Treatment with Onion Juice and Essential Oils This recipe aims to maximize the delivery of nutrients from the onion while counteracting its odor and enhancing its benefits with specific oils. Ingredients: ½ red or white onion (rich in antioxidants). 1 tablespoon of castor oil (ricinoleic acid, known for promoting growth and strengthening). 1 teaspoon of extra virgin olive oil (vitamin E, moisturizer). 5 drops of lemon
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