Questions to Ask About Prediabetes

A prediabetes diagnosis comes with a problem most people don’t recognize in the moment: the appointment is often short, the news is unexpected, and the follow-up guidance — if it comes at all — tends to be vague. “Watch what you eat” and “come back in a year” are not action plans. The questions to ask about prediabetes that actually matter are the ones that turn a diagnosis into a direction: what your numbers mean, what the realistic reversal targets are, what monitoring plan you’re on, and whether any medications are worth discussing. Prediabetes is a clinical window — the period between normal glucose and Type 2 diabetes when intervention has the best chance of changing the outcome. These questions help you use that window well.

Understanding Your Diagnosis

What Exactly Do My Numbers Mean?

Prediabetes is defined by specific laboratory thresholds. A fasting plasma glucose of 100–125 mg/dL, measured after at least 8 hours without eating, falls in the prediabetes range. An A1c of 5.7–6.4% — the same test used to monitor diabetes — indicates prediabetes when it falls in this range. A 2-hour oral glucose tolerance test result of 140–199 mg/dL is a third diagnostic method. Your first question should be: which test produced your result, and what was the specific number?

This matters because results at different ends of the range carry different risk profiles. An A1c of 5.8% and an A1c of 6.3% are both prediabetes, but the 6.3% is substantially closer to the Type 2 diabetes threshold of 6.5%. Knowing exactly where you fall helps calibrate how urgently intervention is needed. Also ask: was the result confirmed? A single borderline result should ideally be repeated on a different day before major lifestyle decisions are made.

How Serious Is Prediabetes — and How Likely Is It to Progress?

Without intervention, approximately 15–30% of adults with prediabetes will develop Type 2 diabetes within five years (CDC, 2023). That means the majority — 70–85% — do not progress to Type 2 diabetes within that timeframe even without intervention. The more important statistic is the reversal evidence: the landmark Diabetes Prevention Program (DPP) clinical trial demonstrated that intensive lifestyle intervention reduced progression from prediabetes to Type 2 diabetes by 58% over three years — significantly better than the 31% reduction achieved by metformin (DPP Research Group, 2002).

Ask your provider: “Given my specific numbers, how concerned should I be? And what does successful management look like for someone at my level?” The answer should give you a sense of the urgency and a realistic timeline for improvement.

Reversal and Lifestyle Targets

Can Prediabetes Be Reversed?

For many adults, yes — particularly with early intervention. The clinical definition of prediabetes reversal is a return to normal glucose ranges: a fasting glucose below 100 mg/dL or an A1c below 5.7%. The DPP evidence shows this is achievable for a significant proportion of adults who make sustained lifestyle changes. The two targets that drove the 58% risk reduction were specific and measurable: at least 7% reduction in body weight (about 14 pounds for a 200-pound adult) and at least 150 minutes of moderate-intensity physical activity per week.

Ask your provider: “Based on my current weight and activity level, is reversal a realistic goal for me? What specific targets should I be working toward?” Understanding that reversal is a defined clinical goal — not just “feeling better” — makes the effort more purposeful and the progress more measurable.

What Specific Lifestyle Changes Should I Focus on First?

Lifestyle intervention for prediabetes focuses on three interconnected targets: weight management, physical activity, and dietary quality. Weight loss of 5–7% of body weight significantly reduces progression risk even when the full DPP target isn’t reached — partial improvement still matters. Physical activity recommendations center on 150 minutes per week of moderate-intensity activity, such as brisk walking, cycling, or swimming, spread across most days of the week.

Dietary changes for prediabetes don’t require eliminating entire food groups. The evidence-supported approach centers on reducing refined carbohydrates (white bread, white rice, sugary drinks, pastries), increasing fiber intake through vegetables, legumes, and whole grains, and reducing ultra-processed food consumption overall. Ask your provider: “Should I be referred to a registered dietitian nutritionist or a certified diabetes care and education specialist for structured dietary counseling?” General dietary advice is less effective than individualized guidance from a specialist who can work with your food preferences and specific glucose response patterns.

What Is the Diabetes Prevention Program?

The Diabetes Prevention Program is a CDC-recognized lifestyle change program based on the NIH-funded DPP clinical trial. It is available in person through organizations like the YMCA and many hospital systems, and online through CDC-recognized digital DPP providers. The program provides structured group coaching sessions over 12 months, covering goal-setting, dietary strategies, physical activity planning, and the behavioral challenges that arise during sustained lifestyle change. Adults who complete the full program achieve average weight loss of 5–7% and significantly reduce their progression risk.

Ask your provider: “Am I eligible for a referral to the Diabetes Prevention Program, and does my insurance cover it?” Medicare covers CDC-recognized DPP for eligible beneficiaries. Many private insurers cover it as well. Our doctor visit checklist for diabetes covers the full set of questions and preparation steps for any diabetes or prediabetes care appointment.

Monitoring Plan — Blood Sugar and A1c

How Often Should I Test My Blood Sugar at Home?

Home glucose monitoring is not automatically required for everyone with prediabetes. Adults managing through lifestyle changes — and not on glucose-lowering medications — often do not need to test at home between A1c checks. However, some adults find home monitoring motivating and instructive. Seeing how specific meals affect post-meal glucose can reinforce dietary choices in a concrete, immediate way that periodic lab tests cannot.

Ask your provider: “Should I be monitoring my blood sugar at home, and if so, how often and at what times?” If home monitoring is recommended, post-meal testing — two hours after the start of eating — is often more informative for prediabetes management than fasting-only testing, because post-meal glucose elevation is frequently the earliest metabolic abnormality in prediabetes.

How Often Will I Need A1c or Fasting Glucose Tested?

The ADA Standards of Care 2024 recommend that adults with prediabetes have their glucose status monitored at least annually, and more frequently for those at higher risk of progression — particularly those with an A1c closer to the 6.4% threshold, those with significant obesity, or those with a prior history of gestational diabetes. Ask your provider: “How often will you test my A1c or fasting glucose, and what result would indicate I’ve progressed to Type 2 diabetes?”

A result of A1c 6.5% or fasting glucose ≥126 mg/dL on two separate occasions confirms a Type 2 diabetes diagnosis — knowing this threshold helps you understand exactly what each future test result means.

Medication — Is Metformin Appropriate?

Should I Consider Metformin for Prediabetes?

Metformin is the most widely prescribed oral medication for Type 2 diabetes, and the ADA Standards of Care 2024 specifically state that metformin may be considered for adults with prediabetes — particularly those younger than 60, with a BMI of 35 or higher, with a history of gestational diabetes, or with A1c levels at the higher end of the prediabetes range (6.0–6.4%). The DPP demonstrated that metformin reduced prediabetes progression by 31% — meaningful, but significantly less than the 58% achieved by intensive lifestyle intervention.

Metformin is inexpensive, generic, and has a well-established safety profile. The most common side effects are gastrointestinal — nausea, diarrhea, stomach upset — which typically improve within a few weeks and are minimized by taking the medication with food. Ask your provider: “Based on my profile, is metformin something I should consider? What are the risks and benefits in my specific situation?” This is a discussion to have with your care team — not a medication to start independently.

Are There Other Medications Used for Prediabetes?

GLP-1 receptor agonists — including semaglutide (brand name Ozempic or Wegovy) and liraglutide (Victoza or Saxenda) — have demonstrated significant weight loss and glucose-lowering effects and are increasingly discussed in the context of prediabetes management for adults with obesity. These medications are not FDA-approved specifically for prediabetes prevention, but they are used in this context in clinical practice. They are significantly more expensive than metformin and come with their own side effect profiles, primarily gastrointestinal.

If your prediabetes is accompanied by significant obesity and lifestyle intervention has been difficult to sustain, ask your provider: “Are there any other medications, such as GLP-1 agonists, that might be appropriate for my situation?”

Cardiovascular and Related Health Risks

Does Prediabetes Affect My Heart Health?

Adults with prediabetes have elevated cardiovascular risk even before developing Type 2 diabetes. Prediabetes is associated with early changes in blood vessel function, elevated inflammatory markers, and higher rates of hypertension and dyslipidemia — all cardiovascular risk factors. Ask your provider: “Should I have my blood pressure and cholesterol checked as part of this evaluation? Are there cardiovascular risks I should be managing alongside the glucose issue?”

Many adults learn they have prediabetes at a general annual check-up that may or may not include a full lipid panel and blood pressure assessment. Ensuring these are evaluated gives a complete picture of metabolic health and allows any additional cardiovascular risk management to begin early.

Do I Need to Worry About Diabetes Complications Now?

The microvascular complications most closely associated with diabetes — diabetic retinopathy, diabetic nephropathy, and peripheral neuropathy — generally develop after years of sustained elevated glucose in the Type 2 diabetes range, not at the prediabetes stage. However, some research suggests that early-stage nerve damage and kidney function changes may begin at the higher end of prediabetes glucose levels. Ask your provider: “Given my glucose level, should I have any baseline assessments done now — such as kidney function or an eye exam — before starting treatment?”

Non-alcoholic fatty liver disease is also more common in adults with prediabetes, and asking about liver health screening is reasonable if you have other risk factors such as obesity or elevated liver enzymes.

When Would I Need to See a Specialist?

Most adults with prediabetes are managed effectively in primary care, particularly in the early stages when lifestyle intervention is the primary focus. Specialist referral is appropriate in specific situations.

An endocrinologist should be involved if prediabetes progresses to Type 2 diabetes despite lifestyle intervention and metformin, if you have complex comorbidities, or if your provider is uncertain about the right monitoring or treatment approach. A certified diabetes care and education specialist (CDCES) provides structured self-management education that most primary care visits cannot replicate — including detailed carbohydrate management, glucose monitoring instruction, and practical behavioral coaching. A registered dietitian nutritionist (RDN) offers individualized dietary counseling that translates general guidance into specific, practical meal planning appropriate for your food preferences, schedule, and metabolic goals.

Ask your provider: “Should I see any specialists at this stage? Can you refer me to a CDCES or a dietitian who works with prediabetes?”

Our questions to ask about Type 2 diabetes covers the specialist-level questions that become relevant if prediabetes progresses. Our long-term diabetes care plan provides the framework for managing diabetes if a Type 2 diagnosis follows. Our living well with diabetes guide covers the sustainable self-management approach that underlies both prediabetes reversal and long-term Type 2 diabetes management.

The CDC’s prediabetes overview provides authoritative statistics on prediabetes prevalence and the evidence base for the Diabetes Prevention Program. The NIDDK’s prediabetes and insulin resistance overview covers the clinical mechanisms behind prediabetes and the evidence for intervention. The ADA’s prediabetes guidance provides the current standards for diagnosis, monitoring, and treatment.

What Does Success Look Like?

Understanding what you’re working toward makes the effort sustainable. Success in prediabetes management has a specific clinical definition: A1c returning to below 5.7% or fasting glucose consistently below 100 mg/dL. But partial improvement is also meaningful. An A1c that drops from 6.3% to 5.9% — still in prediabetes range but further from the Type 2 threshold — represents real risk reduction even if full normalization hasn’t been achieved.

Ask your provider: “What would my A1c need to be at my next check to know the intervention is working? And what’s a realistic timeline to expect improvement?” The DPP results appeared within months of intervention, with the most significant changes in the first six months of sustained lifestyle change. Most providers would consider an A1c retest at six months a reasonable evaluation point for adults who make meaningful lifestyle changes.

The important framing is that prediabetes is not “cured” by a single normal A1c — it requires sustained habits to keep glucose in the normal range. Success means building a sustainable routine, not completing a temporary program.

Frequently Asked Questions

Can prediabetes be reversed with diet alone?

For some adults, dietary changes alone are sufficient to return glucose to the normal range, particularly for those at the lower end of the prediabetes range (A1c 5.7–5.9%, fasting glucose 100–109 mg/dL) and those with modest excess weight. The evidence most strongly supports a combined approach: reducing refined carbohydrate intake, increasing dietary fiber, achieving 5–7% weight loss where applicable, and adding physical activity. For adults whose glucose is at the higher end of prediabetes (A1c 6.2–6.4%), dietary changes alone may not be sufficient.

What A1c level is considered prediabetes?

The ADA defines prediabetes as an A1c between 5.7% and 6.4%. An A1c below 5.7% is considered normal, while 6.5% or higher on two separate tests confirms a Type 2 diabetes diagnosis. Within the prediabetes range, risk is not uniform: an A1c of 5.7% represents lower risk of near-term progression than an A1c of 6.3%, which is close to the diabetes threshold.

How quickly does prediabetes turn into Type 2 diabetes?

Without intervention, approximately 15–30% of adults with prediabetes develop Type 2 diabetes within five years — meaning the majority do not progress in that timeframe even without treatment. With intensive lifestyle intervention, that risk is reduced by 58%. With metformin, it is reduced by 31%. The timeline varies significantly based on starting A1c, body weight, physical activity level, diet quality, and other metabolic factors.

Should I take metformin for prediabetes?

The ADA Standards of Care 2024 indicate that metformin may be considered for adults with prediabetes who are under 60, have a BMI of 35 or higher, have a history of gestational diabetes, or whose A1c is at the higher end of the prediabetes range (6.0–6.4%). Metformin reduced prediabetes progression by 31% in the DPP. For most adults, lifestyle changes are the first-line recommendation, with metformin as an adjunct for those at higher progression risk. This is a decision to make with your care team based on your specific profile.

What foods should I avoid with prediabetes?

Refined carbohydrates — white bread, white rice, sugary beverages, pastries, and processed snacks — raise post-meal glucose more rapidly than higher-fiber carbohydrates, and reducing these is the most impactful dietary change for most adults with prediabetes. Ultra-processed foods in general are associated with higher type 2 diabetes risk. Foods to emphasize include non-starchy vegetables, legumes, nuts, whole grains, and lean proteins. A registered dietitian can translate these principles into a specific, practical eating plan tailored to your preferences.

A prediabetes diagnosis is the most important medical conversation many adults will have before being told they have Type 2 diabetes — because it may be the last moment when the trajectory is clearly reversible. The questions in this guide are designed to help you leave that appointment with specific information: your exact numbers, your reversal targets, your monitoring schedule, and whether any medications are appropriate to discuss. Bring these questions to your next visit and ask for clear answers to each one.

What to Do After Your Prediabetes Appointment

The appointment itself is only the beginning. Many adults leave with a clearer sense of the diagnosis but no written plan, no follow-up date, and no referrals — which means the momentum of that conversation fades before anything changes. Taking a few specific steps after the visit significantly improves the chance that the intervention actually happens.

Request a written summary of your results. Ask for the actual lab values — fasting glucose, A1c, or OGTT result — not just “prediabetes.” Knowing whether your A1c is 5.8% or 6.3% changes how urgently you approach the next steps. Most practices can send a portal summary within 24 hours; if yours doesn’t, call and ask for the specific numbers.

Set a follow-up date before you leave. The ADA recommends at least annual monitoring for prediabetes, but many providers will defer the next appointment until you call. Scheduling the A1c retest — at six months if you’re making significant lifestyle changes, or twelve months otherwise — before you leave removes the inertia that causes follow-up to slip. Put it on your calendar the same day.

Ask about referrals at the same appointment. Referrals to a registered dietitian, a certified diabetes care and education specialist, or the Diabetes Prevention Program are all easier to request at the initial prediabetes appointment than at a follow-up. Providers are more likely to initiate the referral when the diagnosis is fresh and the visit is focused on it. If you wait until the next annual check-up, the urgency has faded and the referral may not happen.

Start tracking your glucose if recommended. If your provider recommends home glucose monitoring, begin within the first week while the appointment is still fresh. The most informative readings for prediabetes management are fasting glucose (before eating in the morning) and post-meal glucose two hours after the start of the meal. A simple log — even a paper notebook — gives you and your provider concrete data at the follow-up visit rather than general impressions about how you’ve been doing.

Make one dietary change first. Trying to overhaul everything at once is one of the most common reasons lifestyle intervention stalls. Behavioral research consistently shows that a single, specific dietary change — such as eliminating sugary beverages, replacing white rice with a higher-fiber grain, or adding a serving of vegetables to lunch — is more likely to stick than a comprehensive dietary overhaul attempted all at once. Once that change is established as a habit, add another. The goal at six months is not a perfect diet; it is a meaningfully better one.

Find a 150-minute exercise plan that fits your life. The DPP’s 150-minute target sounds manageable — and it is, if the activity is something you’ll actually do. Walking is the most evidence-supported and accessible option. Five 30-minute walks per week is exactly 150 minutes. If your schedule is irregular, three 50-minute sessions or six 25-minute sessions achieve the same target. The format doesn’t matter; consistency does. Starting with a target that’s achievable for your current fitness level and schedule is more important than starting with the most intense option available.

Sources: Centers for Disease Control and Prevention (2023); National Institute of Diabetes and Digestive and Kidney Diseases (2023); Diabetes Prevention Program Research Group, NEJM 2002; American Diabetes Association Standards of Care 2024; Mayo Clinic (2024).