Can I ask what people think please? Recent results, TSH 0.68 range (0.35-4.94) FT4 14.3 range (9.00-19.00) FT3 2.8 range (2.60-5.70) blood test done early in the morning, before levothyroxine and before food and drink, except water. I'm taking 75mcg levothyroxine, feel very well but get constipation, have always had this problem right from childhood. I get tired in the afternoons, but then I'm 70!! Anyway, I said to doc isn't that T3 figure rather low, no he said, that's fine. Just checking what you thought. I did try increasing the T4 about a year ago to 100mcg per day but got palpitations.