What to do, green tea evidence

Published 2026-02-20 · MyCBC Blog

Watch-and-wait for CLL and SLL: What to do, green tea evidence, safe activities and clear signs treatment is needed

Being placed on a watch-and-wait plan after a diagnosis of chronic lymphocytic leukaemia (CLL) or small lymphocytic lymphoma (SLL) raises many practical questions. Which activities are safe? Can lifestyle changes or supplements delay treatment? What symptoms or test trends mean it is time to start therapy? This guide summarises the most useful, evidence-aware advice for people in observation and their caregivers.

What does "watch-and-wait" mean?

Watch-and-wait (also called active surveillance or observation) is an intentional strategy used when CLL or SLL is present but not causing symptoms, organ damage or significant blood count problems. The disease is monitored regularly with clinical reviews and blood tests, and treatment is started only if progression meets accepted clinical criteria. The goal is to avoid unnecessary therapy and its side effects while keeping close attention to changes that require intervention.

Who is suitable for watch-and-wait?

• People with no or minimal symptoms related to CLL/SLL.
• Stable blood counts without significant anaemia or thrombocytopaenia.
• No fast-growing lymph nodes that impair organ function.
• People whose disease does not meet guideline criteria for immediate treatment.

Individual circumstances vary. If you have questions about whether observation is appropriate, discuss them with your haematology team.

Everyday activities: what you can and cannot do

Most normal activities are safe while on watch-and-wait. The general principle is to maintain health and quality of life while avoiding unnecessary risks.

Safe and recommended activities

• Regular exercise - aerobic and resistance training improves cardiovascular health, mood and energy levels.
• Balanced diet - focus on whole foods, lean protein, fruit and vegetables to manage weight and other health risks.
• Weight management - healthy weight reduces risk of heart disease and diabetes.
• Routine screenings and vaccinations - keep up with cancer screening, influenza and other recommended vaccines after checking suitability with your specialist.
• Normal travel and social activities - allowed in most cases; consider infection risk and access to care if travelling far.
• Moderate alcohol - occasional drinks are typically fine; avoid heavy daily drinking.

Activities to be cautious about

• Avoid situations where immediate medical care would be unavailable if you are near the point of needing treatment.
• Take special precautions during outbreaks of infectious disease; people with CLL have a higher infection risk.
• High-risk stunts or extreme activities that could cause injury are not recommended for anyone and are best avoided.

Green tea, supplements and "natural" approaches: what the evidence says

It is common to wonder whether natural products can slow CLL. The short answers are: some products have been studied, but strong evidence that any supplement delays the need for treatment or prolongs survival is lacking.

Green tea extracts

High-dose green tea extract, containing concentrated catechins (for example epigallocatechin gallate or EGCG), has been investigated in small trials and can reduce lymphocyte counts in some people with early disease. However, there is no clear proof that such supplements extend time to treatment or improve long-term outcomes. Also:

• You would need an amount of concentrated extract that is difficult to match by drinking ordinary green tea.
• Supplements are not regulated like medicines, so quality and potency vary by brand.
• Side effects and interactions are possible, especially at high doses.

If you are considering a green tea supplement, discuss it with your specialist before starting.

Other supplements (vitamin D, multivitamins, herbal products)

Correcting a documented vitamin D deficiency is reasonable for general health, but there is no robust evidence that vitamin D prevents CLL progression. Herbal products and over-the-counter supplements lack consistent quality control and proven benefit in CLL. Always check supplements with your healthcare team before using them.

How to reduce other health risks while in observation

People with CLL often live with other chronic conditions that are more likely to cause harm than the early disease itself. Focusing on these areas improves overall survival and quality of life.

• Control cardiovascular risk - treat high blood pressure, high cholesterol and diabetes aggressively.
• Quit smoking - reduces risk of infections, lung disease and other cancers.
• Maintain cancer screening - skin checks, colorectal screening, and other routine tests as recommended.
• Vaccinations - discuss influenza, pneumococcal and shingles vaccinations with your haematologist; some live vaccines may not be appropriate.

What to watch for: the tripwires that usually lead to treatment

Treatment decisions are rarely made on a single blood test. Clinicians look at clinical trends and how the disease affects your life. Key indicators that suggest starting therapy include:

• Significant or progressive symptoms - persistent fatigue that interferes with daily life, unintentional weight loss, fevers or night sweats.
• Progressive cytopenias - falling haemoglobin leading to symptomatic anaemia or platelet counts low enough to cause bleeding.
• Rapidly enlarging lymph nodes or spleen - especially when they cause pain or organ compression.
• Recurrent or severe infections - indicating impaired immune function.
• Rapid rise in white cell counts - especially when accompanied by other adverse trends.

There is no single white blood cell number that mandates treatment. The decision is based on the overall clinical picture and the trend over time. Most people have a window of months or longer to make a considered decision about therapy rather than needing immediate treatment the day a single test changes.

Practical checklist to track between appointments

Keeping a simple record helps you and your team recognise meaningful change.

• Weekly or monthly weight and note of unintentional loss.
• Frequency and severity of infections in the last 6-12 months.
• New or increasing fatigue, impact on work and daily tasks.
• Any new bruising or bleeding.
• Notable increase in lymph node size or new lumps.
• Documented trends in haemoglobin and platelet counts from blood tests.

When to see a CLL specialist

Seeing a specialist can be very helpful but is not always required immediately after diagnosis. Reasons to consult a CLL haematologist include:

• Planning treatment for the first time or considering clinical trials.
• Complex or rapidly changing disease behaviour.
• Unexplained symptoms that other specialists cannot attribute to a different cause.
• Seeking a second opinion or more detailed discussion of long-term management options.

Managing fatigue and the emotional burden

Fatigue is one of the most common and frustrating symptoms, whether during observation or after treatment. Practical strategies include:

• Rule out reversible causes - check for anaemia, thyroid problems, vitamin deficiencies and medication side effects.
• Energy pacing - break tasks into smaller steps and prioritise important activities.
• Regular light exercise - even short daily walks can improve energy over time.
• Sleep hygiene - maintain a consistent sleep schedule and reduce stimulants near bedtime.
• Mental health support - counselling, peer support groups and psychological therapy can help with anxiety and adjustment.

Common pitfalls and misconceptions

• Expecting a single lab value to trigger treatment - focus on trends and symptoms, not one isolated result.
• Self-prescribing supplements - unregulated products can be ineffective or harmful and may interact with future therapies.
• Ignoring comorbidities - heart disease and other conditions often have greater short-term impact than early CLL and deserve active management.
• Delaying medical review for new significant symptoms - unusual or persistent problems should be checked rather than assumed unrelated.

Summary: practical priorities while on watch-and-wait

• Stay active and manage other health risks - exercise, healthy diet and control cardiovascular risk factors.
• Keep routine monitoring appointments and report new or worsening symptoms promptly.
• Be cautious with supplements and discuss any you intend to use with your healthcare provider.
• Maintain cancer screening and annual skin checks due to higher risk of secondary cancers.
• Plan ahead for treatment discussions so you have time to weigh options if therapy becomes advisable.

Watch-and-wait is an active approach that works well for many people. Staying informed, tracking meaningful changes and focusing on overall health and quality of life will help you make the best decisions with your clinical team. If anything significant changes, ask for a timely review so that treatment decisions can be made without undue delay.