When taken regularly, a vitamin D supplement can help ensure you’re getting enough of the key vitamin so your body can function at its best.* Here’s a breakdown of what to know about vitamin D supplements, the effects of vitamin D in the body, and how to make sure your routine is working for you. And while you can certainly try to add more fatty fish to your diet (which provides some vitamin D) and spend more uninterrupted time in the sun, taking a vitamin D supplement is almost always necessary to get optimal amounts D (i....

Enter collagen water, a simple tonic that’s currently having a moment. So much so that you can now find it in stores, prepackaged and ready to go. But what is collagen water, exactly? Let’s explore its benefits and side effects (plus how to make it yourself) below. The prepackaged drink is super trendy right now, thanks to the popularity of collagen in general. That’s because collagen supplements are commonly sold as powders, which are meant to be mixed in liquid....

Supported by The Human Genome Project (1990-2003)—an international research effort to determine the DNA sequence of the entire human genome—researchers began to better understand human nutrition at the molecular level of gene expression. Within the last three decades, nutrigenomics research has advanced the interest of personalized nutrition therapy, while confirming that food conveys powerful information used by the body. And it plays an instrumental relationship in our genes, too. Similarly, nutrigenetics is a personalized nutrition2 domain that examines the different phenotypic responses to diet (such as glucose levels, weight, or plasma cholesterol) depending on an individual’s genetic composition, dietary intake, and health outcomes....

Learning to move away from these scripts can unlock whole new realms of pleasure, new types of sensations, and more uniquely connective experiences. In most modern-day practice in the West, tantric massage involves massaging and stimulating the full body with particular focus on sensitive areas like the penis and vulva. It’s sometimes referred to as simply an erotic massage, although a tantra massage also incorporates breathwork, meditation, and mindfulness elements and is not necessarily sexual....

We reached out to sex educator and coach Suzannah Weiss and sex educator and Girl Sex 101 author Allison Moon for their tips on how to nail it. The giver’s body is perpendicular to the receiver’s body (so their bodies form a T shape), as opposed to parallel (where their bodies are aligned in one straight line). (Here’s a helpful diagram.) RELATED: 29 Oral Sex Techniques That Actually Make Women Orgasm The positioning can be tricky, so Weiss suggests trial and error....

As the alternatives are becoming more apparent, we are also becoming more aware of our options around our relationship structures. Monogamy is pretty much optional these days. More and more people are not only learning about ethical non-monogamy, but they are considering it for themselves. In the best-case scenario, both parties in the relationship are equally curious about exploring non-monogamy together. But that is not always available. As one partner might rejoice in their newfound freedom, the other partner might find themselves awake in their nightmare....

As a Ph.D. diplomate of the American Board of Sleep Medicine, I’ve devoted 35 years to the study of human sleep and clinical sleep disorders. Here are the drinks I recommend avoiding for better shut-eye—and the beverages that will help your sleep better: Milk, 90 minutes before sleep, may also help you fall asleep (if you’re not lactose intolerant). Whether you warm it up or not is a personal preference—it has no effect on milk’s sleep-inducing properties, which are tied to the essential amino acid L-tryptophan....