Vigornail is a balanced combination of essential elements for nail nutrition, in sachets with a pleasant orange flavor, free of sugar, stabilizers, or colorants. Also available in capsules. Vigornail contains, among other ingredients, L-cystine and zinc. Adequate zinc intake is one of the factors that helps keep nails in optimal condition. L-cystine is a sulfur-containing amino acid that is a component of keratin. Instructions for Use: Press the sachet with your fingers in different directions and pour the contents into a glass with 150 ml of water. Shake with a spoon until completely dispersed. Consume immediately. The solution can be taken at any time of day. Do not take this product if you are allergic (hypersensitive) to any of its components. Not recommended for those with cystine absorption or elimination disorders. Recommended daily intake: 1 sachet, for a minimum of 2 months. Do not exceed this dose. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.