I am a sporty & healthy 40 yr old lady and started using these 5000iu D3 from energize health store with some basic k2 I got from another store. The chronic pain I had on my back from an injury was less sore within a week and has completely disappeared now its been a month. I hope everyone gets their D3 sorted. I am now very health conscious after seeing what a difference one vitamin makes. I just never want to feel uncomfortable in my own body like that again. I happily vouch for energize health store and the quality of the supplements they sell. I buy am in JHB & get mine shipped up. Thats how strongly I reccomend the store and the quality products. Thanks a mil guys.