Another factor you could add, if you stay in a warm climate, and the type of food you eat, could contribute a change in your spunk
So every time I holiday in Italy, my spunk becomes more white, and I produce a lot more. I suppose with the weather, sunny climated, it could be down tot he sun and the Vit-D being produced. Food wise, a lot of pasta made with love, namely olive oil, which is used in most cooked items in Italy, and of course on the pasta, parmesan cheese, and lots of it