I am 79 yrs. old. I've been taking Jarrow K2-MK-7 for over 2 yrs. & have miraculous results. After about 1 yr. I had no tartar on teeth-even on exposed roots & none since. I gradually increased dosage from 45 to 90mcg then to 180 mcg. About month ago a large "age spot" 1"x1/2" x1/4" high dark grainy growth on L. shoulder on back just crumbled, leaving only a small round 1/4" pink spot w/minor blood...it continues to fade away. A wart in front of throat fading/shrinking daily; age spots all over my body are gradually fading & disappearing, including many under my breasts -the ones under rt. breast fading faster than the left. My hair & nails growing very strong & fast, new hair growing all the time- no more hair loss. Now I complain about constantly having to cut all nails & hair. My skin is no longer dry. Age 17 I had multiple cervical & thoracic compression fractures from diving accident. DXA bone can about 7-8 yrs ago revealed spinal osteopenia; same test March this yr. still osteopenia. I had a freak fall 2/27/17 & sustained "non-displaced" (hairline) fracture of left shoulder; I took entire brunt of fall on front left shoulder; entire upper arm was black & movement very limited. Everyone was surprised the fx was not worse. My MD presc. Fosamax, I refused to take, instead doubled dosage of K2. I used home exercises to prevent Frozen shoulder syndrome & pain meds until no longer needed. Many medical doctors refuse to believe K2 even exists...I gave 3 Kaiser drs. & 1 tech "Vitamin K2 & the Calcium Paradox" by Kate Rheaume-Bleue, B.Sc, ND & some info from "Vitamin K2, The missing Nutrient for Heart and Bone Health" by Dennis Goodman, MD. I hightly recommend both books-both available from Amazon. Also, based on author's suggestions, I also take Vitamins A, D3 & Zinc in addition to others I already took. Getting K2 from MK7 important. Both authors explain why. I also gave book to my acupuncturist, who's eyes lit up when he saw the title' ; he now recommends K2 to most patients, & one to my dentist who was baffled by the sudden changes in my teeth & one to several family members