* Historically:
* Carmine (Cochineal): This is probably the most well-known historical source of red. Carmine is a pigment derived from crushed cochineal insects. These insects, native to Central and South America, produce carminic acid, which is extracted and processed to create a vibrant red dye. Carmine is still used in some lipsticks today, and it's often listed as "carmine," "cochineal extract," "natural red 4," or "CI 75470" on ingredient lists.
* Red Ochre: A natural clay pigment containing iron oxide.
* Cinnabar: A toxic mercury sulfide mineral that was used in ancient times, despite its harmfulness. Its use was eventually discontinued due to its toxicity.
* Red Lead (Minium): Another toxic substance (lead tetroxide) used in the past that was later abandoned due to safety concerns.
* Plant-Based Dyes: Various plants have been used to create red dyes, including beetroot, henna, and berries. However, these often weren't as vibrant or long-lasting as other options.
* Modern Times:
* Synthetic Dyes: Most modern red lipsticks rely on synthetic dyes created in laboratories. These dyes offer a wide range of red shades, excellent color stability, and are generally considered safe for use in cosmetics when properly regulated. Common synthetic red dyes include:
* D&C Red 6
* D&C Red 7
* D&C Red 21
* D&C Red 27
* D&C Red 28
* Red 40 Lake
* And many others. The "D&C" indicates that the dye is approved by the FDA for use in drugs and cosmetics.
* Carmine: As mentioned earlier, carmine is still used in some lipsticks, often favored by consumers looking for "natural" ingredients.
* Iron Oxides: Iron oxides (like red iron oxide) can contribute to red tones in lipstick formulations.
Important Considerations:
* Safety: Modern cosmetic regulations are in place to ensure that the dyes used in lipsticks are safe for human use. However, some people may have sensitivities or allergies to specific dyes, so it's always a good idea to check the ingredient list.
* Vegan/Vegetarian: If you're vegan or vegetarian, be aware that lipsticks containing carmine are not suitable. Look for products that specifically state they are vegan.
In summary, while red lipstick historically relied on a wider and sometimes dangerous array of sources, modern red lipsticks primarily use synthetic dyes or carmine for their red color, with regulations in place to ensure safety.