Thanks for posting query.
Penis size is determined by some genes.No medicine or tablet can increase the size of penis.
No food items are associated to increase the size and hardness of penis. Just take nutritious food.
But there are drugs of Phosphodiesterase -5 (PDE-5) inhibitor groups like sildenafil
, tardanafil etc., they can make the penis harder and increase the duration of erection if there are no other causes of erectile dysfunction
Consult a sexologist/urologist
for taking those drugs.
Dr Sourav Ganguly.