What's Causing This Fast Hair Growth?

I am now 8 weeks post relaxer. My hair normally grows very slow IMO, but i am noticing that my hair has grown an inch in the past eight weeks. What can be causing this faster growth? Well, i believe it's the combination of some of the new additions to my regimen. I have been taking hair,skin, and nail vitamins, along with MSM and a regular multi-vitamin. I have replaced my mult-vitamin with prenatal vitamins. I also have add JBCO (Jamaican Black Castor Oil). I apply 2x week on wash days. I am not sure if i'm having a growth spurt or this combo is what is doing it, but i hope it continues

Supplement Facts
Serving Size:
Servings Per Container:
Amount per Serving % Daily Value
Vitamin A as Palmitate 3,500 IU, Beta-Carotene 2,500 IU 6,000 IU 75%
Vitamin C Ascorbic Acid 100 mg 167%
Vitamin D Cholecalciferol 400 IU 100%
Vitamin E d-alpha Tocopheryl Succinate 100 IU 333%
Vitamin K Phytonadione 65 mcg
Thiamin (B1) 10 mg 588%
Riboflavin (B2) 10 mg 500%
Niacin (B3) 20 mg 100%
Vitamin B6 Pyridoxine 15 mg 600%
Folate,Folic Acid,Folacin 800 mcg 100%
Vitamin B12 Cyanocobalamin 25 mcg 313%
Biotin 300 mcg 100%
Pantothenic acid Vitamin B-5 15 mg 150%
Calcium Carbonate, Citrate-Malate 200 mg 15%
Iron Amino Acid Chelate 30 mg 167%
Iodine from Kelp 150 mcg 100%
Magnesium Oxide 100 mg 22%
Zinc Citrate 15 mg 100%
Selenium Selenomethionine 100 mcg
Copper Amino Acid Chelate 2 mg 100%
Manganese Citrate 2 mg
Chromium Amino Nicotinate 120 mcg
Molybdenum Amino Acid Chelate 75 mcg
Potassium Citrate 10 mg
Boron Glycinate 1 mg
Choline Bitartrate 10 mg*
Inositol 10 mg*
PABA 10 mg*
Plant Source Enzymes
Protease 660 HUT*
Amylase 226 DU*
Lipase 2 LU*
Cellulase 3 CU*
Food and Herbal Ingredients
Spirulina 20 mg*
Ginger (rhizome) Fresh Juice 10:1 Extract equivalent to 20 mg of herbal powder 20 mg*
Red Raspberry *(leaf) 2:1 Extract equivalent to 100 mg of herbal powder 50 mg*
* Daily Value not established.