Wavy hair is not simply dominant or recessive. Hair texture is a polygenic trait, meaning it is influenced by multiple genes working together rather than a single dominant or recessive gene. The most well-studied gene involved is the trichohyalin (TCHH) gene, but variations in several other genes also play a role, which is why children … Read more
Yes, baking soda absorbs many odors. It works through a simple chemical reaction, not by masking smells. When baking soda, which is sodium bicarbonate, comes into contact with acidic odor molecules, it neutralizes them. This is why it is a common and effective tool for freshening refrigerators, carpets, and shoes. Research supports its use as … Read more
You feel the sting behind your eyes and know what is coming. Your throat tightens, your face warms, and tears start to pool. You are in a meeting, on a bus, or at a family dinner, and you cannot leave. The good news is that crying is a normal physical response, and you can interrupt … Read more
Merkel cell carcinoma is a rare and aggressive type of skin cancer that starts in Merkel cells, which are cells in the top layer of skin linked to the sense of touch. It often appears as a fast-growing, painless bump on sun-exposed skin, most commonly on the head, neck, or arms. The main symptoms are … Read more
The scratchy throat hits first. Then the sneezing, the congestion, or maybe the sudden fever and body aches. You need to know quickly: is this a cold you can ride out, or the flu, which can turn serious? The fastest way to tell the difference is the speed and severity of your symptoms. The flu … Read more
Yes, you get bloated when on your period. It is one of the most common symptoms of the menstrual cycle. Most women who menstruate experience some degree of bloating right before or during their period. The bloating happens because of natural hormone shifts, not because of anything you did wrong. It is a normal part … Read more
Black carrot juice comes from a dark purple variety of the common carrot. Unlike the orange carrots you see in most grocery stores, black carrots are packed with a group of plant pigments called anthocyanins. These pigments give the juice its deep color and act as antioxidants in the body. The juice tastes mildly sweet … Read more
Tretinoin does not kill bacteria. It is not an antibacterial agent. Its power comes from changing how your skin cells behave, which indirectly makes life much harder for acne-causing bacteria. The bacteria that cause acne, Cutibacterium acnes, thrive in clogged pores. Tretinoin works by speeding up cell turnover, which prevents pores from becoming clogged in … Read more
Opening the freezer to grab ground beef for dinner and finding it brown can be alarming. You might wonder if it has spoiled or if you need to throw it away. The short answer is that meat turning brown in the freezer is a normal chemical reaction, not a sign of spoilage. Frozen meat that … Read more
A belly button keloid is an overgrowth of scar tissue that forms after skin damage, such as a piercing or surgery. Getting rid of one completely is difficult, but treatment options do exist. Dermatologists typically combine surgical removal with other therapies to reduce the chance it grows back. The most effective approach depends on the … Read more