Kilpirauhanen ja lihavuus?

Suomessa ohjeistuksissa lukee (lähes kaikissa hormoneissa) ylipainon VÄHENTÄVÄN laboratoriossa mitattua arvoa.

Vähenemistä perustellaan lihavan suuremmalla veritilavuudella, vaikka toisaalta lihavalla on enemmän soluja, joille pitäisi siirtää enemmän vähän kaikkea. Thyroid Manager, kappale "Effects of the Environment, Chemicals and Drugs on Thyroid Function" mukaan lihavuuden pitäisi LISÄTÄ mm. T3:a eikä lihavuus vaikuta aivot-kilpirauhanen-hormonituotanto-akseliin. Onko tämäkin jotain suomettumista, kun näin räikeästi valehdellaan?

Overfeeding and Obesity

Overfeeding produces an increase in the serum T3 concentration as a result of an increased conversion of T4 to T3. It is particularly marked when the excess calories are given in the form of carbohydrates.77 Thus, it appears that the effect of overnutrition on iodothyronine metabolism is the opposite of that of starvation. This finding gives further credence to the speculation that changes in thyroid hormone may serve to modulate the homeostasis of energy expenditure.

Although it has been reported that serum T3 concentrations correlate with body weight,78 it appears that this phenomenon reflects the effect of an increase in caloric intake on T3 production. Most studies find that obese subjects have normal thyroid function and hormone metabolism.79 Furthermore, no abnormalities in the hypothalamic-pituitary-thyroid axis have been demonstrated in obese subjects.