First, I want to say from my long experience that NOW products are great! Magnesium is great for men or women. Lowering my blood pressure. at times I take two (it's safe) It is also very relaxing and helps to fall asleep! At times or rarely if I get really upset or feel irritable (like most of us human... unless you're a sheep) I take one and I'm so relaxed. Relaxes tight muscles and muscles spasm. It's also great to take at Menopause or if your period is changing your mood. Magnesium is known to be healthy, Your heart will thank you. Happy Heart Happy Life. I take it for years. Don't take more than two a day (800 mg). Most days I take only one at night at bedtime