Sources and original illustrations

Primary references and the limits of this educational collection.

Primary references

• AAD: How to Clean Your Makeup Brushes — Brush cleaning, drying and avoiding shared makeup tools.
• FDA: Eye Cosmetic Safety — Eye-area product use, contamination, sharing and avoiding unsafe application.
• FDA: Shelf Life and Expiration Dating of Cosmetics — Storage, shelf-life variability, eye cosmetics and changes in products.
• FDA: Microbiological Safety and Cosmetics — Contamination risks, product handling and the role of preservatives.
• AAD: Is It Okay to Wear Makeup with Acne? — Makeup selection, gentle removal and tool hygiene for acne-prone skin.
• AAD: What Causes Acne? — Hair products, equipment and cosmetics can be relevant to acne concerns.
• AAD: How to Fade Dark Spots in Darker Skin Tones — Irritation, pigmentation, sun protection and professional assessment.
• AAD: Melasma Self-Care — Sun and visible light protection, gentle products and cosmetic coverage.
• AAD: Seven Rosacea Skin-Care Tips — Gentle handling and skincare as part of a clinician-directed rosacea plan.
• FDA: Allergens in Cosmetics — Allergens, ingredient information and limits of marketing terms.
• AAD: Hair Removal: How to Shave — Shaving preparation, direction, blade care and avoiding irritation.
• AAD: Hair Removal: How to Wax — Waxing precautions, medicine interactions and avoiding injured skin.
• AAD: Laser Hair Removal FAQs — Procedure risks, skilled provision and realistic expectations.
• AAD: Six Ways to Remove Unwanted Hair — Differences among shaving, waxing, depilatories and professional options.
• AAD: How to Apply Self-Tanner — Self-tanner application principles and continued need for sun protection.
• AAD: How to Safely Exfoliate at Home — Exfoliation methods, irritation risks and existing routine considerations.
• FDA: Alpha Hydroxy Acids — AHA ingredient information and sun-sensitivity cautions.
• AAD: Seven Tips for Healing Dry, Chapped Lips — Avoiding lip irritation, suitable care and assessment of persistent problems.
• AAD: Is Your Workout Causing Acne? — Gentle sweat handling, clean clothing and equipment contact.
• AAD: Twelve Summer Skin Problems You Can Prevent — Swimming-related dryness and practical summer skincare.

Original visual material

The diagrams in this edition are original SVG illustrations explaining the sequence or decisions in each guide. They do not show a laboratory experiment, a personal trip or a tested product result. No photographs from the linked sources are reproduced.

Check the source in context

References were consulted during preparation of this edition. A source may cover a broader or narrower question than a particular guide; the support notes above explain why it is listed. Read the original for methodology, exceptions and updates.