The 45-year-old 'Friends' star is apparently worried about losing her beautiful blonde locks, reported Showbizspy.
"She's been getting scalp stimulant treatments a few times a week and started taking prenatal vitamins in the hopes they'll restore her hair growth," a source said.
"Several friends have joked that Jennifer better watch out or she'll end up resembling her now deceased godfather Telly Savalas who bald most of his adult life!," the source added.
Last year the actress had debuted a bob cut. However, Aniston began to miss her long locks within days of the haircut.