Vitamin a na-eri nri:

1. Ọ bụ ihe na-atọ ụtọ niile-okike multivitamin, nke bụ kacha ngwakọta nke amino acid, vitamin na mineral.

2. Ihe ndị a ekena-akwado usoro ahụ ji alụso ọrịa ọgụ dị mma na ọrụ ọbara nke nwere ike ịkwalite ahụike na ume dị mma na anụ ụlọ gị.

Nye dị ka ọgwụgwọ ma ọ bụ gwerie ma gwakọta ya na nri dịka usoro a si dị:

1. Nkịta obere (ihe na-erughị 20 lbs.): 1 mbadamba kwa ụbọchị.
2. Nkịta dị n'etiti (20-40 lbs.): mbadamba 2 kwa ụbọchị.
3. Nkịta buru ibu (41-60 lbs.): mbadamba 3 kwa ụbọchị.
4. Nnukwu Nkịta (61-80 lbs.): 4 mbadamba kwa ụbọchị
5. Nkịta buru ibu (81-100 lbs.): mbadamba 5 kwa ụbọchị.
6. Nnukwu ụdị (100-150 lbs.): 6-7 mbadamba kwa ụbọchị.