Hello, it's safe N age-old authentic product.its stress of examintion so keep yourself hydreyted with plenty of liquids like nimupani mausambi juice coconut water ,  so u feel fresh, take some hard core candy as orange from parley, RAVALGAON and put in  mouth to suck which stimulate the brain. light diet as spicy fried greasy junk food produse sleep gastritis etc.ok.