He can take Ashwagandha tablets twice daily for the better effectiveness.Keep him under nutritious food .

Avoid ashvgandha lifestylechange, kachnarguggal coriander can helpyou

If body is not showing any symptom at all...then there is no need to worry because these values of tsh, t3, t4 vary from person to person

This is hyperthyroidism and must be addressed timely.

“Hi, I went through your father’s reports. Since his T3–T4 are stable and antibodies are normal, the low TSH has to be understood in the overall context, including symptoms and health history. Ashwagandha is a good rasayana, but in thyroid cases its use is very individualized—it can help some but may not suit everyone. Instead of starting directly, it’s better if we discuss his lifestyle, prakriti and medical background once, so I can guide you safely on whether KSM-66 will benefit him or if any other Ayurvedic approach will be better. You can book a consult and I’ll plan it out in detail for him.”

Only for 7hrs to 7days

We need to check him to understand the root cause of the values and symptoms if any... Taking random meds like ashwagandha Or any other herb may not give him the optimal results.

Consult ayurveda physician for proper diagnosis and root cause of ailment before consuming any medicine

Consult for prescription and guidance

"Low TSH with normal T3, T4 and no symptoms usually indicates subclinical hyperthyroid pattern, especially if consistent for long. Since antibodies are negative, it is not autoimmune. Ashwagandha may influence thyroid function, so better to avoid without supervision. I suggest you consult me for a safe personalized plan."

Consult for prescription

No absolutely no .it's medicine not dal chawal