Guajava - Guajava demonstrates antifungal, antibacterial, anti-inflammatory, laxative, and analgesic properties. It is used to treat herpes ulcers, ringworm, dermatitis, and urinary tract infections. Guajava is related to cassia and senna, and contains anthraquinones found in those other species as well.
Vitamins B, particularly biotin (vitamin B7) and B12 are important to keep healthy nails. If your nutrition lacks in vitamins B, nails will be dry and brittle. Vitamin C deficiency is associated to brittle nails and may cause infections of nail tissues.
Nails Vitamin Deficiency. The color of your nails can often give you an indication of the condition of your health. In fact, a doctor can tell if you have a certain disease or condition just by looking at your fingernails. Discoloration of nails and brittleness could be caused due to the vitamin deficiency.