Opt for a college offering home science after 10th or after 12th Science (with biology/microbiology).
You can switch over to a graduate degree in home science specializing in nutrition or dietetics as a major.
After graduation, you can pursue a diploma in dietetics or sports nutrition.
Further studies such as a Masters, M Phil and PhD can also be done after graduation.
To know more..http://bit.ly/dieticianyb