When the skin is exposed to UV-B light, cholesterol in the skin is transformed into vitamin D3. In general the skin does not need much UV-B energy to generate vitamin D3, and 15 minutes of strong sunshine every day is usually considered enough.
Best Answer: These are all types of drugs in one form or another. Hallucinogen is an umbrella term, meaning this includes both stimulants and depressants but mainly depressants.A hallucinogen is a drug that causes hallucinations. Examples include LSD and different types of mushrooms.llegal stimulants include meth(amphetamine)s, cocaine, crack, ecstasy. A depressant is a drug that overrelaxes your body, you are less aware and more susceptible to others' influence. Your heart rate and BP slow down, and you can lack coordination.
a chemical agent capable of producing hallucinations. adj., adj hallucinogenÂ´ic. Drugs that have hallucinogenic properties include lsd, mescaline, and psilocybin.Certain mushrooms, seeds, and cactus buttons (such as peyote) are also hallucinogenic. mind-altering chemical, drug, or agent, specifically a chemical the most prominent pharmacologic action of which is on the central nervous system (for example, mescaline); in normal people, it elicits optic or auditory hallucinations, depersonalization, perceptual disturbances, and disturbances of thought processes.