Your hormone levels can be adversely affected by dietary inadequacies, including a lack of iodine. Some guys with low T recover when an underlying thyroid problem is treated or resolved. You are getting EFA’s and iodine in the clams+oysters. You can add fish oil caps, flax seed meal or oil and nuts to your diet. Low cholesterol can also be a problem and eggs would be helpful in that case. If your blood pressure is increasing, high potency B complex multi-vit with iodine and trace elements. Vit C and natural source vit-E would be a good basis of antioxidants.
I am not surprised that those dietary features could improve your hormones. EFA’s are very important to brain structure and function. Your EFA increases may have helped you feel better from a cognitive point of view. Thyroid status also greatly influences brain function and well-being. Thyroid levels regulate mitochondrial function, the foundation of energy for every cell in your body. There can be lot more going on than change of T levels.
Suggest that you also test DHEA-S and supplement if needed. Most men at your age are deficient. DHEA levels at the time of a man’s heart attack are predictive of one-year mortality.