The genetic history of the British Isles is the subject of research within the larger field of human population genetics. It has developed in parallel with DNA testing technologies capable of identifying genetic similarities and differences between populations.he genetic history of the British Isles is the subject of research within the larger field of human population genetics. It has developed in parallel with DNA testing technologies capable of identifying genetic similarities and differences between populations.
Brittle diabetesâalso called labile diabetesâis a rare but serious form of the disease in which there are dramatic and often unpredictable fluctuations in blood sugar levels. Blood sugar naturally rises and falls throughout the day in response to meals, exercise and other factors.
There are a few serious medical causes, such as malnutrition, hypothyroidism and having a biotin deficiency. If your brittle hair is chronically awful, your first course of action should be to check in with your doctor. But the most common culprits of crispy, fragile hair are excessive exposure to UV rays, heat styling, chlorine, and chemical processes, like dyes and bleaches.