Posted by iHerb Customer on Jun 21, 2014 | Verified Purchase
About me - I am 33 and have a manageable chronic endocrine problem. I function relatively normal but was often too tired, could not concentrate, lacked appetite, was underweight. I figured that maybe these are side effects of my health issues. About vitamin D3 - I read a few articles, some reports - it's all out there, accessible (Dr. Oz for beginning). These opened my eyes. I don't get enough sun exposure, I spend most of my life indoors and also in my region we get 4-5 months of dimmed sunlight. Conclusion - I started a high dose of vitamin d3 and I could feel and see the results: better mood and appetite, gained a few pounds. I also supplemented minerals and took l-glutamine. In the sunny summer days I cut down the dosage, 1 every 2-3 days. About this brand - softgels, easy to take, large quantity, nice price. I took natrol's before and switched to these because of the price-quantity advantage.