Tsh of 8: Low to high ranges, symptoms, and what they mean
Low to high ranges, symptoms, and what they mean
The thyroid-stimulating hormone (TSH) test measures the amount of TSH in the blood. TSH levels convey how well a person’s thyroid is functioning.
Doctors can use TSH test results to diagnose thyroid disorders, such as hypothyroidism and hyperthyroidism.
The pituitary gland produces TSH, which is a hormone that stimulates the thyroid gland.
The thyroid is a butterfly-shaped gland in the throat. It produces hormones that help regulate many bodily functions, such as metabolism, heart rate, and body temperature.
This article describes the TSH test and results. We also discuss what high and low TSH levels indicate and available treatments.
Share on PinterestMNT-infographic_guide infographic by Diego Sabogal 1401179-TSH-levels-original
The normal range depends on a person’s age and whether they are pregnant.
The ranges tend to increase as a person gets older. Research has not shown a consistent difference in TSH levels between males and females.
However, according to the American Thyroid Association, doctors generally consider levels are within a normal range between 0.4–4.0 milliunits per liter (mU/l).
The following table provides estimates of TSH levels that are normal, low (indicating hyperthyroidism), and high (indicating hypothyroidism):
| Hyperthyroidism | Normal | Mild hypothyroidism | Hypothyroidism |
| 0–0.4 | 0.4–4 | 4–10 | 10 |
Many labs use these reference values.
However, there is some debate about these ranges. The author of a 2016 review suggests that normal levels are more likely to fall between 0.5–2.5 milli-international units (mIU) per milliliter.
Females are more likely to experience thyroid dysfunction than males. The Office on Women’s Health reports that 1 in 8 females experience thyroid problems at some point. This includes hyperthyroidism and hypothyroidism.
The risk of thyroid problems increases during pregnancy and around menopause.
Research does not show a consistent difference in TSH levels between males and females. However, some evidence suggests that TSH levels are generally higher in females. For example, studies in 2020 investigating Chinese and French populations suggest that TSH levels are higher in females, but other factors, such as age, are more likely to affect TSH levels.
In some people, thyroid conditions are linked with sexual dysfunction. This may affect more males than females. According to a 2019 study, 59–63% of males with hypothyroidism also experience sexual dysfunction, compared with 22–46% of females who have hypothyroidism.
Blood TSH levels tend to increase as people get older, with evidence noting that hypothyroidism is the most common thyroid condition in people over 60 and steadily increases with age.
Research involving older adults suggests that roughly 7–14% of people may have TSH levels above the upper limit of reference ranges.
Pregnancy hormones naturally increase the levels of certain thyroid hormones in the blood. This is essential for the development of the fetal brain and nervous system.
At the same time, the levels of TSH in the blood decrease. As a result, doctors use lower reference ranges during pregnancy. The lower TSH range is decreased by around 0.4 mU/l, and the upper limit reduced by approximately 0.5 mU/l.
Levels of TSH in the blood increase gradually during the second and third trimesters, but they remain lower than normal levels in women who are not pregnant.
Doctors carefully monitor TSH levels throughout pregnancy. Having unusually high or low levels can affect the risk of miscarriage and cause pregnancy-related complications, such as:
- preeclampsia
- premature birth
- low birth weight
- congestive heart failure
TSH levels are highest at birth and gradually decrease as a child gets older. As such, TSH levels can vary among children.
After the newborn phase, health experts may define mild hypothyroidism in children as TSH levels ranging between 4.5–10 mU/l.
The following table shows TSH levels for children by age, according to an older study using data from 512 healthy children:
| Age | Reference ranges (mU/l) |
| Day of birth | 3.84–11.75 |
| 1 month | 1.18–3.57 |
| 1 year | 1.17–3.55 |
| 5 years | 1.15–3.47 |
| 12 years | 1.09–3.31 |
| 18 years | 1.05–3.16 |
High TSH levels indicate hypothyroidism. People develop hypothyroidism when their thyroid produces low levels of hormones.
When someone’s thyroid gland does not produce enough hormones, the pituitary gland produces more TSH to compensate.
Symptoms of hypothyroidism may include:
- fatigue
- weight gain
- swelling of the face and neck
- increased sensitivity to cold temperatures
- dry skin
- thinning hair
- a slow heart rate
- irregular or heavy menstrual periods
- fertility problems
- depression
- constipation
Low TSH levels indicate hyperthyroidism.
This is also known as an overactive thyroid.
If a person’s thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH.
Symptoms of hyperthyroidism can include:
- irregular or rapid heartbeat
- muscle weakness
- nervousness or irritability
- difficulty sleeping
- frequent bowel movements or diarrhea
- weight loss
- mood changes
The TSH test involves a healthcare professional drawing blood from a vein in the inner arm. They then send the blood sample for laboratory testing.
Usually, people do not need to prepare for a TSH test. However, if the doctor is checking the blood for more than one issue, a person may need to fast or prepare in another way. The doctor will provide this information beforehand.
A TSH test is often the best way to monitor thyroid function. However, if a person has abnormally high or low TSH levels, the doctor may need to perform at least one other diagnostic test to identify the underlying cause.
These tests look at levels of specific thyroid hormones and antibodies.
In addition to age, sex, and pregnancy, many other factors can also affect TSH levels. Evidence suggests that genetic, environmental, or intrinsic factors can alter TSH levels. Some of these factors may include:
- other conditions occurring at the same time
- medications
- supplements
- ethnicity
- diet and iodine status
- time of day and time of year
- autoantibodies and heterophilic antibodies
- smoking
- pollutants
Doctors can treat hypothyroidism with medications, such as levothyroxine, that replace the missing thyroid hormones.
A person should take this medication once a day or as prescribed. The doctor will monitor how well the treatment is working by running additional blood tests every few months.
According to the Food and Drug Administration (FDA), people should take levothyroxine once a day: in the morning and on an empty stomach, at least half an hour before eating.
The FDA also recommends that a person informs their doctor if they eat soybean flour, walnuts, dietary fiber, or cottonseed meal — these foods can affect how the body processes levothyroxine. Drinking grapefruit juice may also delay the absorption of levothyroxine.
Hyperthyroidism treatments focus on reducing thyroid hormone levels to prevent long-term health complications.
A person may need to take beta-blockers and antithyroid medications.
Another effective treatment is radioiodine therapy. This involves taking a capsule or liquid that contains radioactive iodine-131, which destroys cells that produce thyroid hormones. However, people who take radioiodine therapy may develop hypothyroidism in the future.
Surgical removal of the thyroid gland can treat severe hyperthyroidism. Doctors often reserve this for individuals who cannot take first-line medications and severe cases of hyperthyroidism.
A TSH test measures the amount of the hormone in the blood.
Doctors can use the results to diagnose thyroid conditions, such as hypothyroidism and hyperthyroidism.
Normal TSH ranges can vary widely, depending on a person’s age, sex, and weight. Reference TSH ranges remain controversial, but for most people, the normal range falls between 0.4 and 4.0 mU/l.
Having an overactive or underactive thyroid can cause health issues that interfere with a person’s daily life. During pregnancy, unusually high or low TSH levels can lead to complications.
A doctor can provide more information about the TSH test and interpreting the results.
Low to high ranges, symptoms, and what they mean
The thyroid-stimulating hormone (TSH) test measures the amount of TSH in the blood. TSH levels convey how well a person’s thyroid is functioning.
Doctors can use TSH test results to diagnose thyroid disorders, such as hypothyroidism and hyperthyroidism.
The pituitary gland produces TSH, which is a hormone that stimulates the thyroid gland.
The thyroid is a butterfly-shaped gland in the throat. It produces hormones that help regulate many bodily functions, such as metabolism, heart rate, and body temperature.
This article describes the TSH test and results. We also discuss what high and low TSH levels indicate and available treatments.
Share on PinterestMNT-infographic_guide infographic by Diego Sabogal 1401179-TSH-levels-original
The normal range depends on a person’s age and whether they are pregnant.
The ranges tend to increase as a person gets older. Research has not shown a consistent difference in TSH levels between males and females.
However, according to the American Thyroid Association, doctors generally consider levels are within a normal range between 0.4–4.0 milliunits per liter (mU/l).
The following table provides estimates of TSH levels that are normal, low (indicating hyperthyroidism), and high (indicating hypothyroidism):
| Hyperthyroidism | Normal | Mild hypothyroidism | Hypothyroidism |
0–0. 4 | 0.4–4 | 4–10 | 10 |
Many labs use these reference values.
However, there is some debate about these ranges. The author of a 2016 review suggests that normal levels are more likely to fall between 0.5–2.5 milli-international units (mIU) per milliliter.
Females are more likely to experience thyroid dysfunction than males. The Office on Women’s Health reports that 1 in 8 females experience thyroid problems at some point. This includes hyperthyroidism and hypothyroidism. The risk of thyroid problems increases during pregnancy and around menopause.
Research does not show a consistent difference in TSH levels between males and females. However, some evidence suggests that TSH levels are generally higher in females. For example, studies in 2020 investigating Chinese and French populations suggest that TSH levels are higher in females, but other factors, such as age, are more likely to affect TSH levels.
In some people, thyroid conditions are linked with sexual dysfunction.
This may affect more males than females. According to a 2019 study, 59–63% of males with hypothyroidism also experience sexual dysfunction, compared with 22–46% of females who have hypothyroidism.
Blood TSH levels tend to increase as people get older, with evidence noting that hypothyroidism is the most common thyroid condition in people over 60 and steadily increases with age.
Research involving older adults suggests that roughly 7–14% of people may have TSH levels above the upper limit of reference ranges.
Pregnancy hormones naturally increase the levels of certain thyroid hormones in the blood. This is essential for the development of the fetal brain and nervous system.
At the same time, the levels of TSH in the blood decrease. As a result, doctors use lower reference ranges during pregnancy. The lower TSH range is decreased by around 0.4 mU/l, and the upper limit reduced by approximately 0.5 mU/l.
Levels of TSH in the blood increase gradually during the second and third trimesters, but they remain lower than normal levels in women who are not pregnant.
Doctors carefully monitor TSH levels throughout pregnancy. Having unusually high or low levels can affect the risk of miscarriage and cause pregnancy-related complications, such as:
- preeclampsia
- premature birth
- low birth weight
- congestive heart failure
TSH levels are highest at birth and gradually decrease as a child gets older. As such, TSH levels can vary among children. After the newborn phase, health experts may define mild hypothyroidism in children as TSH levels ranging between 4.5–10 mU/l.
The following table shows TSH levels for children by age, according to an older study using data from 512 healthy children:
| Age | Reference ranges (mU/l) |
| Day of birth | 3.84–11.75 |
| 1 month | 1.18–3.57 |
| 1 year | 1.17–3.55 |
| 5 years | 1.15–3.47 |
| 12 years | 1. 09–3.31 |
| 18 years | 1.05–3.16 |
High TSH levels indicate hypothyroidism. People develop hypothyroidism when their thyroid produces low levels of hormones.
When someone’s thyroid gland does not produce enough hormones, the pituitary gland produces more TSH to compensate.
Symptoms of hypothyroidism may include:
- fatigue
- weight gain
- swelling of the face and neck
- increased sensitivity to cold temperatures
- dry skin
- thinning hair
- a slow heart rate
- irregular or heavy menstrual periods
- fertility problems
- depression
- constipation
Low TSH levels indicate hyperthyroidism. This is also known as an overactive thyroid.
If a person’s thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH.
Symptoms of hyperthyroidism can include:
- irregular or rapid heartbeat
- muscle weakness
- nervousness or irritability
- difficulty sleeping
- frequent bowel movements or diarrhea
- weight loss
- mood changes
The TSH test involves a healthcare professional drawing blood from a vein in the inner arm.
They then send the blood sample for laboratory testing.
Usually, people do not need to prepare for a TSH test. However, if the doctor is checking the blood for more than one issue, a person may need to fast or prepare in another way. The doctor will provide this information beforehand.
A TSH test is often the best way to monitor thyroid function. However, if a person has abnormally high or low TSH levels, the doctor may need to perform at least one other diagnostic test to identify the underlying cause. These tests look at levels of specific thyroid hormones and antibodies.
In addition to age, sex, and pregnancy, many other factors can also affect TSH levels. Evidence suggests that genetic, environmental, or intrinsic factors can alter TSH levels. Some of these factors may include:
- other conditions occurring at the same time
- medications
- supplements
- ethnicity
- diet and iodine status
- time of day and time of year
- autoantibodies and heterophilic antibodies
- smoking
- pollutants
Doctors can treat hypothyroidism with medications, such as levothyroxine, that replace the missing thyroid hormones.
A person should take this medication once a day or as prescribed. The doctor will monitor how well the treatment is working by running additional blood tests every few months.
According to the Food and Drug Administration (FDA), people should take levothyroxine once a day: in the morning and on an empty stomach, at least half an hour before eating.
The FDA also recommends that a person informs their doctor if they eat soybean flour, walnuts, dietary fiber, or cottonseed meal — these foods can affect how the body processes levothyroxine. Drinking grapefruit juice may also delay the absorption of levothyroxine.
Hyperthyroidism treatments focus on reducing thyroid hormone levels to prevent long-term health complications.
A person may need to take beta-blockers and antithyroid medications.
Another effective treatment is radioiodine therapy. This involves taking a capsule or liquid that contains radioactive iodine-131, which destroys cells that produce thyroid hormones.
However, people who take radioiodine therapy may develop hypothyroidism in the future.
Surgical removal of the thyroid gland can treat severe hyperthyroidism. Doctors often reserve this for individuals who cannot take first-line medications and severe cases of hyperthyroidism.
A TSH test measures the amount of the hormone in the blood. Doctors can use the results to diagnose thyroid conditions, such as hypothyroidism and hyperthyroidism.
Normal TSH ranges can vary widely, depending on a person’s age, sex, and weight. Reference TSH ranges remain controversial, but for most people, the normal range falls between 0.4 and 4.0 mU/l.
Having an overactive or underactive thyroid can cause health issues that interfere with a person’s daily life. During pregnancy, unusually high or low TSH levels can lead to complications.
A doctor can provide more information about the TSH test and interpreting the results.
Heating cabinet with mounting plate (WxHxD), mm, 500x700x350, TSh-9
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Basic cabinets with mounting plate
| Heater 150 W, 220 V | 1 pc. |
| Automatic 1P, 6A, 4.5kA, C | 1 pc. |
| Feed-through terminal, 2-wire ZNI-4 mm2 | 1 pc. |
| Cable gland (for cable D 18-25 mm) PG-29 | 6 pcs. |
| Fan 120x120x25, 220 V, 19 W, 109 m3 | 1 pc. |
| NC thermostat red (0..60 0 C) | 1 pc. |
| NO thermostat blue (0..60 0 C) | 1 pc. |
| Document pocket | 1 pc. |
| Lock+key | 2 sets |
| Mounting plate (galvanized) 410×610 mm | 1 pc. |
| Ground bar with insulator DIN rail 8 slots | 1 pc. |
| End sensor | 1 pc. |
| DIN rail 1.23 m | 1 pc. |
The complete set of these cabinets can be changed, for this, contact the manager of Metcom Group LLC.
Characteristic
| Useful depth, mm | 310 |
| Color | Gray RAL 7035 |
| Degree of protection | IP66 |
| Climatic version | UHL1 |
| Coating | Powder |
| Height, mm | 700 |
| Width, mm | 500 |
| Depth, mm | 350 |
| Weight, kg | 24 |
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Please note that the reference information about the goods posted on this site is not an offer, the availability and cost of equipment must be clarified with the managers of Metcom Group LLC, who will be happy to help you in choosing equipment and placing an order for it.
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IEK Busbar N “zero” on DIN insulator Ni ShNI-6×9-8-D-S, YNN10-08-D-K07-N
IEK Busbar N “zero” on DIN insulator Ni ShNI-6×9-8-D -C, YNN10-08-D-K07-N
N, PEIEK YNN10-08-D-K07-N
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IEK YNN10-08-D-K07-N
DIN rail N “zero” Ni SHNI-6×9-8-D-S IEK
Buy at low prices IEK YNN10-08-D-K07-N
Description IEK YNN10-08-D-K07-N
Busbars with insulator type SHNI are designed for electrical and mechanical connection of neutral, protective and phase conductors.
Structurally, the SHNI busbars are made of a brass busbar mounted on a plastic insulator or in an insulator made of self-extinguishing plastic. Normal tire operating conditions are: – ambient temperature from -40 to +50 C; – the average value of relative humidity is not more than 90%. Nickel-plated tires have a higher corrosion resistance of the material and an attractive appearance, which makes them suitable for use in environments with increased aggressiveness.
High corrosion resistance material for protection in aggressive environments. Nickel-plated busbar allows simultaneous connection of copper and aluminum alloy conductors of the 8000 series. Insulator material: flame retardant plastic (test with a glowing thread at 960°C). Maximum operating current: up to 100 A. Tires comply with the requirements of TR TS 004/2011. Made from high quality brass. Wide range of products.
Specifications
| Bar section: | 6×9 |
| Rated current In: | 100 A |
| Material: | Brass |
| Finish: | Nickel plated |
| Number of cable outlets: | 8 |
| Bar length: | 64 mm |
| Type: | With DIN insulator |
| Insulator color: | Blue |
| Rated voltage: 9002 6 | 400 V |
Max. conductor cross section: | 16/6 mm² |
| Operating temperature: | -40…+50 °C |
| Width: | 88.5 mm |
| Height: | 42 mm |
| Mounting type: | DIN rail |
| Purpose of tires: |
Specifications IEK YNN10-08-D-K07-N
- Packing width
100 cm - Packing height
100 cm - Packing depth
100 cm - Volume weight
1 kg - Multiplicity of delivery
1
org/PropertyValue”>Unit
PC.
- Mounting type
DIN rail
- Material
Brass
- Tire section
6×9
- Rated current, A
100a
- Type
Tires N
- Insulator color
Blue
- Packing width
100 cm - Packing height
100 cm - Packing depth
100 cm - Volume weight
1 kg - Unit
PC.
- Multiplicity of delivery
1 - Mounting type
DIN rail
- Material
Brass
- Tire section
6×9
- Rated current, A
100a
- Type
Tires N
- Insulator color
Blue
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Minimum order amount 1,500.00 ₽
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Manufacturer’s warranty 1 year
IEK is the largest company that sells electrical products that can be used for example for the use and distribution of energy or light or anything else related to energy or light. IEC was established in 1999 and still works.
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Volumetric weight: 1 kg
Dimensions: 100x100x100
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Pickup in Russia
Volumetric weight: 1 kg
Dimensions: 100x100x100
fan, house 7/2, entrance 2, office 1
Delivery by courier in Russia
Volumetric weight: 1 kg
Dimensions: 100x100x100
In Russia:
| Own delivery service | 390 ₽ | 2-3 days | |
| Russian Post | clarify | 3-20 days | |
| IEC | clarify | 2-7 days | |
| SDEK | Express light | clarify | 2-7 days |
| SDEK | Super Express | clarify | 2-4 days |
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| ZhelDorExpedition | clarify | 3-10 days | |
| Baikal Service | clarify | 2-10 days | |
| Energy | 400. | ||