Is it possible to get hair loss in a day?

So over Christmas break, I was on supplements called chromium and alpha lipoic acid on large doses. Both are known to cause hair loss. I came home, got a haircut, hair looked fine. Then i took these supplements and i noticed hair falling out. Like i could grab lose hairs of my head and hair came off into my hand in the shower, maybe like 10 or 15 strands. Finally a month later i connected the dots and stopped the supplements and the shedding soon stopped. Thing is, I got the exact same haircut again from the exact same person, and I feel like there’s less hair around my temples and more of my forehead is showing. Like It caused thinning in that short amount of time. Thoughts?

Generally hair loss takes time but your detecting it might be in a day when you look at yourself and stop denying what you have been seeing for sometime. Most people just don’t notice it until it passes a threshold. A doctor in Denver 30 years ago, pulled out 50% of the hair on one side of a black haired, white skinned man. He couldn’t tell which side was 50% with photos or independent observers. That tells you that you can lose a lot of hair without seeing it. That is why I perform HAIRCHECK tests to measure what can’t be seen. Hair loss rarely happens overnight.

You don’t lose your hair overnight, but you recognize it after you stop denying that you are losing your hair and that can be instantaneous.