Consider taking L-arginine. This is an amino acid that leads to increased blood flow, helping the penis get larger during an erection. A study conducted at Tel Aviv University showed that some men experienced improvements after taking the supplement for 6 weeks. It's available in natural food stores, and the recommended dose is 1 gram three times a day.[4]
4 - Use a moisturizer on the penis before the exercises and it is preferred not to use soap and shampoo as these materials will lead to redness and irritation of the penis skin . If it stays for a long period of time, in addition to dry skin, and the occurrence of cracks, it is preferred to use the Intensive Care Vaseline instead of the ordinary Vaseline as it can stay on the skin for long period of time without irritating or damaging the skin of the penis.

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