I've been taking one of these daily for 3 months after finding out I have a B12 deficiency when trying to find the cause of my dizziness, Vertigo spells and body sway. I also take Migrelief to treat vestibular migraines and I've been in physical therapy for 4 months. All of these things have helped me do a big turnaround after living with balance issues for several years. I stopped taking Jarrow Formulas Methylcobalamin for a week to see if it was really making a difference and I noticed a lot of my symptoms started to return. I take this Methly B12 religiously. I've also noticed an increase in memory and focus which I had been struggling with the last year or so. I'm not sure about increased energy since I still get tired a lot, but I also know I need to get more sleep every night lol. The taste isn't bad, but I don't love it either. Also, I'm so happy to report I did not suffer from any allergic reactions that other reviews have reported, although I suffer from lots of different allergies and allergic reactions to medications are common with me. UPDATE: I've been taking this 4 or 5 times a week for the last year and my B12 level did a complete turnaround at my last physical. My doctor said I can even cut back to 2 or 3 times a week now (though it's water soluable so my body will just pee out the extra). This stuff is the real deal