I don't do well with vitamin A supplementation, but I do well with vitamin D. Your results may vary.
I personally don't do well with Vitamin A supplementation either. FCLO is ok. But I've noticed best results from ingesting pastured liver. It's absolutely amazing. I've been striving to eat 2 or 3 servings of 8 ounces each week.
I also take Vitamin D and get sun somewhat frequently. I take about 5,000-10,000 IU of Vitamin D from supplements, and occaisonally get sun (maybe 2-3 times a week, not much, but accordingly to Dr. Hollick's recommendations for sensible sun exposure).
I'm a sceptic as regards vitamin-/mineral-supplementation. They never worked for me at all. I would recommend your looking at this website to avoid any possible issues in the future:-
Of course. I agree, food is always the best source of nutrients.
Where are you getting your vitamin A and D?
Which foods? How much sun?
I prefer my Vitamin A from liver (of course grass fed). I've been getting beef liver, and I've been eating about 2-3 servings a week of 6-8 ounces. I also take FCLO, maybe a teaspoon a day, some days I skip. Not exact amounts. More just on a 'how I feel' basis.'
I take a Vitamin D3 supplement, 5,000-10,000 IU daily, and I get maybe 5-10 minutes of full body sun exposure 3x a week around noon.