both serum beta-carotene and serum alpha-carotene were associated , although weakly , with food frequency estimates of total vitamin a intake , dietary vitamin a , beta-carotene , other carotenoids , and total carotenoids ( 0.18 less than or equal to r less than or equal to 0.26 ) .
C0053396
beta-carotene
C0007271
carotenoids