Seasonal affective disorder is depression with a seasonal pattern, and UK guidance treats it as depression — which puts talking therapy and medication ahead of the light box that most writing leads with.
Before you start frowning, it is a given that all situations in life are not funny. In fact, when you are seeking therapy, it is usually for something serious that needs to be dealt with so that you can continue to live your life. Here, laughter is used as a means to an end and not as a way to make light of your situation.
The UK figures rather than the inherited American ones: shade from eleven until three, factor 30 with four-star UVA, and the dangerous plants that do not actually grow here.
Sound amalgam fillings should not be removed for health reasons — removing them raises mercury exposure and costs tooth tissue. What the UK rules now say, why the phase-out is an environmental measure rather than a safety finding, and where holistic dentistry goes past the evidence.
What an allergy actually is, what the immune system is doing when one happens, why it affects some people and not others, and how allergy differs from intolerance.