1 Therefore, a deficiency of vitamin B6 may result in symptoms of anxiety and depression due to inhibition of serotonin synthesis. 2  In a study of individuals suffering from frequent anxiety attacks, patients were given vitamin B6 (125mg, 3 times daily) and tryptophan (2 grams daily).
Need an updated list of Hawaii sales tax rates for your business? Download our Hawaii sales tax database! The Kapolei, Hawaii sales tax rate of 4.50% applies to the following two zip codes: 96707 and 96709. There are approximately 29,472 people living in the Kapolei area. Remember that zip code boundaries don't always match up with political boundaries (like Kapolei or Honolulu County), so you shouldn't always rely on something as imprecise as zip codes to determine the sales tax rates at a given address.
The Hawaii Income Tax. Hawaii collects a state income tax at a maximum marginal tax rate of %, spread across tax brackets. Like the Federal Income Tax, Hawaii's income tax allows couples filing jointly to pay a lower overall rate on their combined income with wider tax brackets for joint filers. Hawaii's maximum marginal income tax rate is the 1st highest in the United States, ranking directly below Hawaii's %. You can learn more about how the Hawaii income tax compares to other states' income taxes by visiting our map of income taxes by state. Hawaii effectively doubles bracket widths for married couples filing jointly. Other states with this policy include AL, AZ, CT, ID, KS, LA, ME, NE, and OR.