May 2026 in “Revista Iluminart” In this study, researchers found that adding coffee grounds to neutral shampoo, a popular DIY trend, resulted in peak caffeine extraction after seven days, with concentrations surpassing those in commercial products, suggesting educational potential for chemistry classes.
August 2015 in “Arquivo Brasileiro de Medicina Veterinária e Zootecnia/Arquivo brasileiro de medicina veterinária e zootecnia” This study found that maternal caffeine intake during gestation and lactation can lead to skin lesions like hypotrichosis and alopecia in both mother and offspring rats, irrespective of maternal cortisol levels.
This study evaluated the therapeutic response of an Afro-descendant patient with non-scarring alopecia after prolonged use of alkaline straighteners and mechanical traction, highlighting the susceptibility of Afro hair to chemical and mechanical damage due to its structure.
December 2025 in “Revista em Agronegócio e Meio Ambiente” This study investigated the effects of ultrasound-assisted extraction on sunflower seed oil mixed with defective green coffee grains, finding that higher coffee grain ratios decreased oil yield but increased phenolic content and antioxidant activity, with potential applications for wound treatment.
In this study, researchers found that cosmetic formulations containing guaraná extract effectively controlled oiliness in oily skin and hair by reducing sebaceous gland activity and lipid content without compromising skin barrier function, making them promising for managing excessive sebum production.