On my blood test it showed my platelet count was 599 k/ul, is that bad?

Needs follow up: Why was the blood test done? Platelet count of 599K/ul probably secondary to infection. without details nothing can be guessed. Repeat in 6 months & follow up if you are free of any symptoms.

? iron deficiency: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Talk to the doctor who ordered the tests. Having said that, you may have iron deficiency and should take iron and multivitamin supplement. Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. Get HPV vaccine

Non-specific: About 1/2 of your existing platelets sit on the blood vessel walls unless a stress response causes them to join the circulation. Numbers in this range are considered non-specific and likely indicate some stress that triggered stress hormones like cortisol that cause the increase.