on November 10, 2026

What Does High SGPT Really Mean? Silent Inflammation and What It's Doing to Your Insulin

Diabetes & Liver Health|Liver Essentials|Nutrition After 50
World Diabetes Day Series 2026
By Dt. Sheetal Ruparel Somaiya | Diabetes & Gut Health Specialist
Adult over 50 discussing paired liver function and HbA1c test results with a doctor
Quick answer

What is silymarin and how bioavailable are different silymarin ingredients?

Silymarin is a natural plant extract from the seeds of milk thistle (Silybum marianum), used for liver care for over 2,000 years. Its main active part is called silybin. It supports the liver by acting as an antioxidant and helping calm inflammation signals. The catch is absorption. With a standard silymarin extract, the body takes in less than half, about 23 to 47%.8,10 When silybin is paired with phosphatidylcholine, a fat that is part of your own cell walls, absorption was 4.6 times higher in a small study of nine healthy volunteers.11 Wrapping silymarin in tiny fat bubbles (liposomes) is another approach designed to carry more of it to the liver.9

This World Diabetes Day, 14 November 2026, I want to talk about a number that is handed to so many of my patients over 50 with barely a second glance: SGPT, also written as ALT, sitting just above the “normal” range on a liver function test.

India’s diabetes burden is large and still growing. An estimated 101 million people are living with diabetes, and another 136 million are in the prediabetes range (ICMR-INDIAB).1 If you are an active adult over 50, you or someone close to you has probably had a fasting glucose or HbA1c conversation with a doctor in the past year. What rarely comes up in that same conversation is the liver enzyme reading printed on the same report.

If you searched “what does high SGPT mean,” here is the short version. An elevated SGPT tells us that liver cells are inflamed. That inflammation does not stay in the liver. It sends signals through the blood that make the rest of your body less responsive to insulin. By the end of this article you will know how that link works, which tests to book together, which daily habits help, and how liposomal silymarin may help support the liver pathways involved.

What silent liver inflammation can do to your blood sugar

Inflammation is the immune system’s response to injury or stress. In the liver, that stress can come from excess fat storage, alcohol, ultra-processed food, viral exposure or general metabolic strain. When liver cells stay irritated over time, they release inflammatory messengers called cytokines, mainly TNF-α and IL-6. If this pattern goes unaddressed, insulin resistance can develop quietly, often well before fasting glucose or HbA1c move out of the normal range.

Signs that insulin resistance may already be underway include:

  • Tiredness that hits after meals, especially carbohydrate-heavy ones
  • Abdominal fat that resists changes in diet and exercise
  • Fasting glucose that creeps up year after year, even while still “within range”
  • Difficulty losing weight despite consistent effort

This is not a theoretical link. In a long-term cohort, even modestly elevated ALT predicted new-onset type 2 diabetes independently of BMI, age and family history.2 Earlier work tied raised ALT to reduced insulin sensitivity in the liver well before diabetes was diagnosed.3 The liver and blood sugar tend to travel together, often regardless of body size. I regularly see this pattern in patients with a completely normal BMI but an elevated SGPT.

How does liver inflammation turn into insulin resistance?

Here is the sequence, step by step:

  1. Liver cells become inflamed (from fat accumulation, oxidative stress, or other triggers).
  2. This activates a cellular alarm system called the NF-κB signalling pathway.
  3. NF-κB activation triggers the release of pro-inflammatory cytokines, TNF-α and IL-6, into the bloodstream.
  4. These cytokines reach muscle and fat cells throughout the body.
  5. Inside those cells, the cytokines disrupt IRS-1 signalling (the insulin receptor substrate that normally relays insulin’s message).
  6. Cells stop responding properly to insulin.
  7. Because the signal is broken, the liver keeps releasing glucose into the blood even when it shouldn’t.
  8. Blood sugar gradually climbs over months and years.
Infographic titled How Liver Inflammation Turns into Insulin Resistance, showing eight steps from inflamed liver cells and NF-κB activation to cytokine release, disrupted IRS-1 insulin signalling, and gradually rising blood sugar.

Think of IRS-1 signalling as a relay race. Insulin hands the baton to the cell, and the baton is meant to be carried smoothly to the finish line, where glucose is absorbed. Inflammatory cytokines trip the runner mid-race. The handoff fails, and glucose circulates in the blood instead of being taken up where it is needed.

It is worth knowing that insulin resistance can show up differently in women and is sometimes dismissed as something unrelated. Skin darkening around the neck and underarms (acanthosis nigricans), a history of irregular cycles or PCOS, and stubborn weight gain are all worth raising with your doctor alongside your liver enzymes, rather than treating each one in isolation.

What can you do about a high SGPT and insulin resistance?

The encouraging part is that these patterns respond to consistent, achievable changes. None of this needs a dramatic overhaul. Small, steady shifts add up over months.

Six doable actions after 50

  • Pair your tests. Get HbA1c and fasting glucose done on the same visit as your liver function test, at least once a year or as your doctor advises. This is the single change I wish more people over 50 would make.
  • Ease off alcohol and ultra-processed food. Both place direct metabolic strain on liver cells and feed the inflammatory cycle above. Consistent reduction matters more than occasional strictness.
  • Fill half your plate with vegetables, and add soluble fibre. Fibre slows glucose absorption and supports a healthier gut microbiome, which helps calm the inflammatory signalling that travels between gut and liver.
  • Walk for 30 minutes a day. Brisk walking keeps muscle, a main site where insulin acts, active and engaged, which supports insulin sensitivity.
  • Add gentle resistance movement twice a week. Light resistance bands or body-weight exercises are enough to begin.
  • Manage stress and sleep. Sustained stress hormones can stoke inflammation through the same NF-κB pathway, so rest and relaxation are part of the plan.

How can silymarin support the liver’s inflammation and insulin story?

This is where silymarin, the active complex in milk thistle (Silybum marianum), enters the conversation. It is a mix of flavonolignans, including silybin A and B, isosilybin, silychristin and silydianin, and it has one of the richest bodies of mechanistic research among liver-supportive botanicals.8 Two of its actions are most relevant to what we have just covered:

  • NF-κB inhibition. Silymarin interferes with the same signalling pathway that triggers cytokine release from inflamed liver cells, which helps support a calmer inflammatory response at its source.
  • Antioxidant activity. Silymarin scavenges reactive oxygen species and supports the body’s own antioxidant enzymes (SOD, catalase and glutathione peroxidase), easing the oxidative stress that keeps liver cells irritated.

Research also points to activation of the Nrf2 pathway and lower TNF-α and IL-6 signalling.8 On liver enzymes specifically, a systematic review of 29 randomised controlled trials with 3,846 participants found that 65.5% of studies reported lower liver enzyme levels with silymarin, with the most consistent findings in people with fatty liver.6 A trial protocol known as the Siliver study is assessing ALT, AST, fasting glucose, insulin and HOMA-IR over 12 weeks in NAFLD.7

Here is the catch, and I explain it to almost every patient who asks about milk thistle. Standard silymarin is poorly water soluble (a BCS Class II compound), and its oral bioavailability is reported at only about 23 to 47%.8,9,10 Much of what you swallow in a standard tablet never reaches the liver in a usable form. In a pharmacokinetic study, silybin delivered bound to phosphatidylcholine reached 4.6 times the blood levels of conventional silymarin.11 That is why delivery technology matters as much as the ingredient.

Meru Activs™ Liver Essentials uses LECIVA®-SilyLip, a liposomal silymarin system that wraps the active compound in a sunflower phospholipid shell. The phospholipid layer resembles the liver cell’s own membrane, a format designed to help silymarin reach the liver. The daily serving is two capsules.

This World Diabetes Day, take two steps

World Diabetes Day is a reminder to look early and act early. If you take one thing from this article, let it be this: your liver enzyme reading and your blood sugar reading are part of the same conversation, and they deserve to be tested together.

Step 1: Test together

Book HbA1c and fasting glucose testing on the same visit as your next liver function test, so that silent inflammation is monitored before it reaches diabetes territory.

Step 2: Support your liver every day

Meru Activs™ Phospholipids Liver Essentials

Meru Activs Liver Essentials is a liposomal silymarin supplement made for adults over 50 and formulated for better absorption. It works best alongside the habits above: paired tests, less alcohol and processed food, more fibre, a daily walk and good sleep.

Learn more about Liver Essentials

Consult your doctor before starting any new health capsules, particularly if you have an existing liver or metabolic condition or take long-term prescription medication. Not for children under 5, or for pregnant or lactating women unless directed by a healthcare professional.

Your liver function test is not only a liver story. It may be an early chapter in your blood sugar story too, and early chapters are where small, steady changes count most.

Frequently asked questions

What does high SGPT mean?
A high SGPT, also called ALT (alanine aminotransferase), means liver cells are inflamed or under stress and are leaking this enzyme into the blood at higher than usual levels. It is one of the most commonly flagged markers on a routine liver function test. Doctors usually look for the underlying cause, such as fatty liver, medicines, alcohol or metabolic strain, so a repeat test and an HbA1c and fasting glucose check on the same visit are sensible next steps.
Can liver inflammation cause insulin resistance?
It can contribute. Inflamed liver cells release cytokines such as TNF-α and IL-6 into the bloodstream. These reach muscle and fat cells and disrupt IRS-1, the relay that carries insulin’s message inside the cell. Over time, cells respond less to insulin, which is called insulin resistance and is linked with a higher risk of type 2 diabetes. Cohort studies show that raised ALT predicts later diabetes independently of BMI, age and family history.
What are the signs of insulin resistance?
Common signs include tiredness after carbohydrate-heavy meals, abdominal fat that resists diet and exercise, fasting glucose that rises slowly year after year even within the normal range, and difficulty losing weight despite steady effort. Some women also notice skin darkening around the neck or underarms (acanthosis nigricans). Many people have no signs at all, which is why a fasting glucose and HbA1c test alongside a liver function test is useful.
Is an elevated SGPT serious?
A mildly raised SGPT is common and not automatically an emergency, but it deserves follow-up, especially if it appears on repeat tests. Research shows that even modestly elevated ALT is associated with a higher chance of developing type 2 diabetes later. Your doctor may suggest a repeat liver function test, a review of medicines and alcohol intake, and an HbA1c and fasting glucose test on the same visit to understand the cause.
Can silymarin support healthy liver enzyme levels?
Silymarin, the active complex in milk thistle (Silybum marianum), supports the liver through NF-κB inhibition and antioxidant activity. A systematic review of 29 randomised controlled trials found that 65.5% of studies reported lower liver enzyme levels with silymarin. Standard silymarin is poorly absorbed (about 23 to 47%), so liposomal forms are designed for better delivery. Health capsules do not replace medical care, so please consult your doctor first.
Can you have liver inflammation without symptoms?
Yes, which is why it is called silent inflammation. Liver inflammation can continue for years without pain, digestive symptoms or other obvious signs, and it is often found only through a routine liver function test. Its link with insulin resistance is easy to miss for the same reason, since both can build quietly before blood sugar numbers move outside the normal range. Regular testing after 50 is the most reliable way to notice early.

References

  1. Anjana RM, Unnikrishnan R, Mohan D, et al. Metabolic non-communicable disease health report of India: the ICMR-INDIAB national cross-sectional study (ICMR-INDIAB-17). Lancet Diabetes Endocrinol. 2023;11(7):474-489. doi:10.1016/S2213-8587(23)00119-5
  2. Sattar N, Scherbakova O, Ford I, et al. Elevated alanine aminotransferase predicts new-onset type 2 diabetes independently of classical risk factors, metabolic syndrome, and C-reactive protein. Diabetes. 2004;53(11):2855-2860. doi:10.2337/diabetes.53.11.2855
  3. Vozarova B, Stefan N, Lindsay RS, et al. High alanine aminotransferase is associated with decreased hepatic insulin sensitivity and predicts the development of type 2 diabetes. Diabetes. 2002;51(6):1889-1895. doi:10.2337/diabetes.51.6.1889
  4. Ballestri S, Zona S, Targher G, et al. Nonalcoholic fatty liver disease is associated with an almost twofold increased risk of incident type 2 diabetes and metabolic syndrome: evidence from a systematic review and meta-analysis. J Gastroenterol Hepatol. 2016;31(5):936-944. doi:10.1111/jgh.13264
  5. Marušić M, Paić M, Knobloch M, Liberati Pršo AM. NAFLD, insulin resistance, and diabetes mellitus type 2. Can J Gastroenterol Hepatol. 2021;2021:6613827. doi:10.1155/2021/6613827
  6. Calderon Martinez E, Herrera D, Mogan S, et al. Impact of silymarin supplements on liver enzyme levels: a systematic review. Cureus. 2023;15(10):e47608. doi:10.7759/cureus.47608
  7. de Avelar CR, Nunes BVC, Sassaki BS, et al. Efficacy of silymarin in patients with non-alcoholic fatty liver disease: the Siliver trial, a study protocol for a randomized controlled clinical trial. Trials. 2023;24:177. doi:10.1186/s13063-023-07210-6
  8. Sayyad M, Sutar AD, Shivhare K, Shukla R, Flora SJS. Silymarin as a phytopharmaceutical agent: advances in mechanistic insights, formulation strategies, and pre-clinical applications. Front Pharmacol. 2025;16:1711653. doi:10.3389/fphar.2025.1711653
  9. Makouie S, Bryś J, Małajowicz J, et al. A comprehensive review of silymarin extraction and liposomal encapsulation techniques for potential applications in food. Appl Sci. 2024;14(18):8477. doi:10.3390/app14188477
  10. Woo JS, Kim TS, Park JH, Chi SC. Formulation and biopharmaceutical evaluation of silymarin using SMEDDS. Arch Pharm Res. 2007;30(1):82-89.
  11. Barzaghi N, Crema F, Gatti G, Pifferi G, Perucca E. Pharmacokinetic studies on IdB 1016, a silybin-phosphatidylcholine complex, in healthy human subjects. Eur J Drug Metab Pharmacokinet. 1990;15(4):333-338.

Disclaimer: This article is for general information and educational purposes only and does not constitute medical advice, diagnosis, or treatment. A qualified physician should always evaluate elevated liver enzymes and concerns about blood sugar or insulin resistance. Always consult your doctor before making significant dietary changes, particularly if you are managing a health condition or are on medication. Dietary supplements, including silymarin, are not intended to diagnose, treat, cure, or prevent any disease. Meru Activs Liver Essentials is a health supplement and is not for medicinal use.

Dt. Sheetal Ruparel Somaiya
Nutritionally Reviewed By

Dt. Sheetal Ruparel Somaiya

Clinical Dietitian | Diabetes, Nutrition & Gut Health Specialist | Digital Health Strategist

Clinical dietitian with 20 years of experience in diabetes management, gut health, and lifestyle nutrition for adults over 50. Specialises in practical nutrition planning, medical nutrition therapy, and evidence-based health communication. View Full Profile →