In meteorology, the term isotherm refers to a contour line that connects points on a weather map that have equal temperatures at a given time. Just as contour lines on topographical maps are used to show gradients of elevation, isotherms are used to show gradients of temperature. Isotherms usually are shown in five- or 10-degree intervals on maps. The temperature differences they delineate are often indicated by different colors. The curve of an isotherm is shaped by variations in temperature across the area being mapped.
Biotin is vital to cell proliferation, which is why it is a valuable tool in hair growth. When ingested, biotin reacts with cell enzymes and plays a vital part in producing amino acids, which are the building blocks of protein.
The rate that your hair will grow after you start taking biotin supplements depends on several factors: your metabolism (how quickly you digest and process supplements and food), your daily activity level, your diet, and how much water you drink. If you decide to try biotin to make your hair longer and stronger, do not start with a high dose (some sites recommend taking 10,000 mcg to start) and remember: mcg means microgram. That one millionth of a gram!