What is normal range for T3 and T4?
A normal T3 level might be somewhere between 100 to 200 nanograms per deciliter (ng/dL), while a normal T4 level falls between 5.0 to 12.0 micrograms per deciliter (μg/dL). Free T4, which tests for the amount of T4 that is available in the body, should range between 0.8 to 1.8 nanograms per deciliter (ng/dL).
What does T3 and T4 tell you?
This test measures the level of triiodothyronine (T3) in your blood. T3 is one of two major hormones made by your thyroid, a small, butterfly-shaped gland located near the throat. The other hormone is called thyroxine (T4.) T3 and T4 work together to regulate how your body uses energy.
What are the symptoms of low T3 and T4?
For example, T3 and T4 regulate your heart rate and how fast your intestines process food. So if T3 and T4 levels are low, your heart rate may be slower than normal, and you may have constipation/weight gain. If T3 and T4 levels are high, you may have a rapid heart rate and diarrhea/weight loss.
What are normal T3 levels?
The range for normal values are: Total T3 — 60 to 180 nanograms per deciliter (ng/dL), or 0.9 to 2.8 nanomoles per liter (nmol/L) Free T3 — 130 to 450 picgrams per deciliter (pg/dL), or 2.0 to 7.0 picomoles per liter (pmol/L)
What happens when T3 is low?
Abnormally low levels of T3 may indicate hypothyroidism or starvation. It could also indicate that you have a long-term illness since T3 levels decrease when you’re sick. If you’re sick enough to be hospitalized, your T3 levels are likely to be low.
How can I increase my T3 naturally?
Several health studies have shown that T3 and T4 hormone levels increase with exercise. Beyond helping to stimulate thyroid production, exercise also helps to counteract many of the side effects of hypothyroidism such as gaining weight, loss of muscle, depression, and low energy levels.
Why is T3 more potent than T4?
In terms of its effects on the body, however, T3 is much more active and potent than T4. This is due to two factors. First, more T4 than T3 stays bound to carrier proteins in the blood (and therefore can’t signal hormone receptors). Second, T3 is more effective than T4 at binding and activating the thyroid hormone receptors.
What is the ratio of T3 to T4?
The human thyroid produces t4 and t3 in a ratio of 20:1. That is, it secretes 100 nmol T4 and 5 nmol T3. Armour has a 4:1 ratio, meaning that the amount of t3 is much higher than is found in humans.
How much T3 converts from taking T4?
There is some question over how much t3 is equivalent to a certain amount of t4 but 25mcg t3 is believed to be approximately equivalent to 100mcg t4. In practice this can work very differently though. Maybe reduce to 75mcg levo and add a quarter tablet initially and then another quarter after a few days or a week or so if you are OK with it.
What is the optimal level of T3?
A Free T4 at 14, with a range of 9-19, is mid-range for example, but a Free T4 at 11 is mid-range for a range of 7.5-14.5. So both are considered optimal readings. It’s important to be aware that a suppressed TSH alone doesn’t mean you’re hyperthyroid or over medicated.